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1. 18 Getting Support 18 2 Quick Start 19 Quick Start Part 1 Connecting the Hardware 19 Step 1 Connect the ADSL cable and optional telephone 20 Step 2 Connect the Ethernet cable 20 Step 3 Install USB software and connect the USB cable For Ethernet USB Combo model only 20 Step 4 Attach the power connector 21 Quick Start Part 2 Configuring Your Computers 22 Before you begin 22 Windows XP PCs 22 Windows 2000 PCs 23 Windows Me PCs 24 Windows 95 98 PCs 25 Windows NT 4 0 workstations 26 Assigning static Internet information to your PCs 27 Connecting a computer to the USB port For Ethernet USB model only 28 TDM E400 TDM C40
2. 123 Adding NAT Rules 125 The NAPT rule Translating between private and public IP addresses 125 The RDR rule Allowing external access to a LAN computer 127 The Basic rule Performing 1 1 translations 130 The Filter rule Configuring a Basic rule with additional criteria 131 The Bimap rule Performing two way translations 133 The Pass rule Allowing specific addresses to pass through untranslated 134 13 Configuring Firewall Settings 135 Configuring Global Firewall Settings 135 Managing the Blacklist 138 14 Configuring Filters and Blocking Protocols 139 Configuring IP Filters 140 Viewing Your IP Filter Configuration 140 Configuring IP Filter Global Settings 141 Creating IP Filter Rules 142 IP filter rule examples 147 Viewing IP Filter Statistics
3. 183 How Autodetect Works 183 Autodetect Modes 183 Configuring Autodetect 184 A IP Addresses Network Masks and Subnets 185 IP Addresses 185 Structure of an IP address 185 Table of Contents 11 Network classes 186 Subnet masks 186 B Troubleshooting 188 C Glossary 190 Index 197 13 About this User s Manual This User s Manual shows you how to set up the Ethernet Modem Router and how to customize its configuration to meet the needs of your network and Internet connection type This document is organized in five major parts each containing several chapters Part 1 Getting Started describes the product features provides quick start setup instructions and explains basic configuration information you will need to begin using the Ethernet Modem Router Read the chapters in Part 1 before attempting to use or configure the device Depending on your LAN and Internet connection r
4. 148 Managing Current IP Filter Sessions 148 Configuring Bridge Filters 150 Configuring Global Bridge Filter Settings 150 Adding Bridge Filter Rules 151 Bridge Filter Rule Example 155 Editing and Deleting Rules and Subrules 156 Viewing Rule Statistics 156 Blocking Protocols 157 Part 5 Administrative Tasks and System Monitoring About Part 5 160 TDM E400 TDM C400 ADSL Modem Router User s Manual 10 15 Managing Access to the Configuration Program 161 Managing User Logins 161 Changing Login Passwords 163 Enabling Management through the WAN Port 164 Configuring SNMP 165 Creating Communities 165 Adding Hosts to Communities 166 Viewing Hosts 166 Viewing Glob
5. 92 8 Configuring Dynamic Host Configuration Protocol 93 Overview of DHCP 93 What is DHCP 93 Why use DHCP 93 Ethernet Modem Router DHCP modes 94 TDM E400 TDM C400 ADSL Modem Router User s Manual 8 Configuring DHCP Server 95 Guidelines for creating DHCP server address pools 95 Adding DHCP Server Address Pools 96 Viewing modifying and deleting address pools 98 Excluding IP addresses from a pool 99 Viewing current DHCP address assignments 99 Configuring DHCP Relay 100 Setting the DHCP Mode 101 9 Configuring DNS Server Addresses 103 About DNS 103 Assigning DNS Addresses to PCs 103 Configuring DNS Relay
6. 104 10 Configuring IP Routes 106 Overview of IP Routes 106 IP routing versus telephone switching 106 Hops and gateways 107 Using IP routes to define default gateways 107 Do I need to define IP routes 107 Viewing the IP Routing Table 108 Adding IP Routes 110 11 Configuring the Routing Information Protocol 111 RIP Overview 111 When should you configure RIP 111 Configuring the Ethernet Modem Router s Interfaces with RIP 112 Viewing RIP Statistics 114 Part 4 Security Features About Part 4 116 12 Configuring Network Address Translation 117 Overview of NAT 117 Viewing NAT Global Settings and Statistics 119 Viewing NAT Rules and Rule Statistics 122 Table of Contents 9 Viewing Current NAT Translations
7. When a packet matches a rule it can either be accepted forwarded towards its destination or denied discarded depending on the action specified in the rule Note Bridge filters can be used when the unit is configured in either bridge or router mode Configuring Global Bridge Filter Settings To display the Bridge Filter Configuration page click the Services tab and then click Bridge Filter in the task bar Figure 63 Bridge Filter Configuration Page The Bridge Filter Configuration page displays a table for viewing adding and managing rules and enables you to configure global bridge filter settings For descriptions of the items in the table see Adding Bridge Filter Rules on page 151 You can also configure the following global settings on this page Chapter 14 Configuring Filters and Blocking Protocols 151 Field Description Enable Disable You can click the Enable and Disable radio buttons to activate deactivate the service Although each rule can be independently enabled and disabled no rules will be effective unless the Enable radio button is selected here Default Action Your selection in the Default Action drop down list determines the action to be taken on all packets that do not match a bridge filter rule The available options are o Accept All packets are accepted on all interfaces except those specifically denied by a bridge filter rule Packets may still be denied due to firewa
8. 168 Viewing the System Log You can view data generated or acquired by routine system communication with other devices such as the results of negotiations with the ISP s computers for DNS and gateway IP addresses This information does not necessarily represent unexpected or improper functioning and is not captured by the system traps that create alarms This information accumulates and displays in a system log window To view the system log click the Admin tab and then click System Log in the task bar Figure 74 System Log page You can click to display a Windows File Download dialog box that enables opening or saving the contents of the log to your PC The file is assigned the default name syslog vlf and can be viewed with any text editor Chapter 16 Monitoring System Status and Performing Diagnostics 169 Viewing DSL Information To view configuration parameters and performance statistics for the Ethernet Modem Router s DSL line log into Web Configuration and then click the WAN tab The DSL Status page displays by default Figure 75 DSL Status Page The DSL Status page displays current information on the DSL line performance The page refreshes according to the setting in the Refresh drop down list which you can configure In the DSL Status table the Operational Status setting displays a red orange or green ball to indicate that the DSL line is idle starting up or up and running respectively You can
9. 3 If you want the changes to be permanent follow the instructions on page 46 to commit them Note DNS addresses that are assigned to LAN PCs prior to enabling DNS relay will remain in effect until the PC is rebooted DNS relay will only take effect when a PC s DNS address is the LAN IP address Similarly if after enabling DNS relay you specify a DNS address other than the LAN IP address in a DHCP pool or statically on a PC then that address will be used instead of the DNS relay address 106 10 Configuring IP Routes You can use Web Configuration to define specific routes for your Internet and network data This chapter describes basic routing concepts and provides instructions for creating routes Note that most users do not need to define IP routes Overview of IP Routes The essential challenge of a router is when it receives data intended for a particular destination which next device should it send that data to When you define IP routes you provide the rules that a computer uses to make these decisions IP routing versus telephone switching IP routing decisions are similar to those made by switchboards that handle telephone calls When you dial a long distance telephone number you are first connected to a switchboard operated by your local phone service carrier All calls you initiate go first to this main switchboard If the phone number you dialed is outside your calling area the switchboard opens a
10. Both the LAN eth 0 and or usb 0 and the WAN interfaces eoa 0 are enabled for bridging See Making Interfaces Bridgeable Bridge Enabled on page 79 The bridging service is enabled See Enabling Bridging Mode on page 80 The ISP should provide setup instructions for the LAN PC s which may involve installing software to enable logging in to their servers called a PPPoE client The PC s gateway IP address should be configured as the IP address of the ISPs access server In the System View page in the Home tab the Mode field will reflect Routing and Bridging Although you are exclusively using a bridging connection to your ISP the device recognizes at least one IP enabled interface eth 0 and therefore regards the device as capable of both routing and bridging Chapter 6 Configuring the System Operating Modes 83 Scenario 3 Routed and Bridged Connections to ISP In this configuration the LAN is like that described in Scenario 1 but also includes PCs that use a bridged Internet connection You would then need to establish bridging services in addition to routing This would also be necessary if the LAN contains PCs that use non IP networking protocols such has AppleTalk or IPX This configuration would have these features An Ethernet and or USB interface with an IP address and network mask that identify it as being in the same subnet as the LAN PCs See Chapter 4 for instructions An WAN interface for the
11. Source Destination Port Port number criteria for the source computer s from which the packet originates and destination computer s Port numbers identify the type of traffic that the computer or server can handle and are specified by the Internet Assigned Numbers Authority IANA For example port number 80 indicates a Web server 21 indicates an FTP server You can choose a port type by name from the drop down lists or if not available in the list specify the IANA port number in the text boxes Select Any other port if this criteria will not be used These fields will be dimmed unavailable for entry unless you have selected TCP or UDP as the protocol See the description of Src IP Address for the statement options any eq gt etc TCP Flag Specifies whether the rule should apply only to TCP packets that contain the synchronous SYN flag only to those that contain the non synchronous NOT SYN flag or to all TCP packets This field will be dimmed unavailable for entry unless you selected TCP as the protocol ICMP Type Specifies whether the value in the type field in ICMP packet headers will be used as criteria The code value can be any decimal value from 0 255 You can specify that the value must equal eq or not equal neq the specified value or you can select any to enable the rule to be invoked on all ICMP packets This field will be dimmed unavailable for entry unless you specify ICMP as the protocol
12. The DHCP Server Pool Modify page displays Figure 36 DHCP Server Pool Modify Page You can change the domain name associated with an IP address pool or enable disable the pool By default a pool is enabled when you create it If you want the changes to be permanent follow the instructions on page 46 to commit them Chapter 8 Configuring Dynamic Host Configuration Protocol 99 Excluding IP addresses from a pool If you have IP addresses that are designated for fixed use with specific devices or for some other reason you do not want to make them available to your network you can exclude them from the pool Display the DHCP Server Pool Modify page as shown in Figure 36 Type each address to be excluded in the Excluded IP field and click When you are done specifying excluded addresses click and then use the Commit function to save your changes to permanent memory see page 46 Viewing current DHCP address assignments When the Ethernet Modem Router functions as a DHCP server for your LAN it keeps a record of any addresses currently leased to your computers To view a table of all current IP address assignments display the DHCP Server Configuration page and then click A page displays similar to that shown in Figure 37 Figure 37 DHCP Server Address Table Page The DHCP Server Address Table lists any IP addresses that are currently leased to your computers For each leased address the ta
13. the associated IPoA interface Not all settings are available on the IPoA Interface Modify page To modify the other settings you must delete the interface and create a new one Be sure to submit and commit your changes if you make modifications TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 74 Adding IPoA Interfaces Follow these instructions to add an IPoA interface 1 Display the IPoA page and click The IPoA Interface Add page displays Figure 26 IPoA Interface Add Page 2 Select the next available interface name from the IPoA Interface drop down list 3 In the Configured IP Address and Net Mask text boxes type the address and mask that you want to assign to the IPoA interface If you enable the DHCP option in step 6 below then the IP address you enter here will serve as a requested address the DHCP server may assign another address if necessary 4 From the Interface Sec Type drop down list select the level of firewall security for the interface Public Private or DMZ see page 72 for definitions 5 In the RFC 1577 field click the Yes radio button if the interface complies with the IETF specification RFC 1577 and click 6 If the remote IPoA computer provides a DHCP server you can click the Enable radio button in the Use DHCP field to have the IP address dynamically assigned from the server 7 If you want the IPoA interface to serve as the default route fo
14. TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 146 Field Description ICMP Code Specifies whether the value in the code field in ICMP packet headers will be used as criteria The code value can be any decimal value from 0 255 You can specify that the value must equal eq or not equal neq the specified value or you can select any to enable the rule to be invoked on all ICMP packets This field will be dimmed unavailable for entry unless you specify ICMP as the protocol IP Frag Pkt Determines how the rule applies to IP packets that contain fragments You can choose from the following options o Yes The rule will be applied only to packets that contain fragments o No The rule will be applied only to packets that do not contain fragments o Ignore Default The rule will be applied to packets whether or not they contain fragments assuming that they match the other criteria IP Option Pkt Determines whether the rule should apply to IP packets that have options specified in their packet headers o Yes The rule will be applied only to packets that contain header options o No The rule will be applied only to packets that do not contain header options o Ignore Default The rule will be applied to packets whether or not they contain header options assuming that they match the other criteria Packet Size Specifies that the IP filter rule will take affect only on packets whose size in byte
15. The Ethernet Modem Router can operate as a router a bridge or both The system operating mode is determined by how you configure the LAN and WAN interfaces to exchange data within your network and with your ISP This chapter provides an overview of how routers and bridges work and explains how to configure the device interfaces and other settings to meet the needs of your network and ISP connection type Overview of Bridges and Routers Both bridges and routers enable communication between two networks such as a home network and ISP s network of Internet access servers Although to an end user they may appear to provide the same functionality bridges and routers operate differently and provide different services Some ISPs require their customers to use a bridge connection whereas others allow a routed connection How Bridges Work Bridges enable computers on two networks to communicate as if they are on two segments of the same physical LAN A bridge learns the hardware IDs of all computers on each network it is attached to These hardware IDs are assigned by manufacturers to devices such as network interface cards that enable computers to connect to networks The bridge determines which hardware IDs are connected on each side of the bridge and stores these associations in its bridge forwarding table For example when the Ethernet Modem Router is acting as a bridge it learns to associate the hardware IDs of each of your LAN c
16. See Quick Start Part 2 Configuring Your Computers for instructions 6 Log into Web Configuration by typing the new IP address in your Web browser s address location box 7 If you want the changes to be permanent follow the instructions on page 46 to commit them Configuring the USB Interface IP Address 1 If the LAN Configuration page is not already displaying click the LAN tab If the USB Configuration table does not display below the LAN Configuration table then your system does not support a USB connection Contact your ISP for assistance 2 In the USB Configuration table enter the IP Address and Network Mask for the USB interface The IP address must place the USB interface in the same subnet as the USB computer The USB interface and USB computer can also be in the same subnet as the LAN interface and the computers attached to it For example if the LAN and USB interfaces are assigned addresses 192 168 1 254 and 192 168 1 2 respectively then the PCs attached to either port can be assigned addresses in the range 192 168 1 3 through 192 168 1 253 3 If you are using IGMP on your network click the IGMP Enable radio button See the explanation of IGMP on page 54 4 In the MTU field enter the Maximum Transmission Unit size in bytes This specifies the largest Ethernet packet that the interface will accept Packets larger than this size will be dropped 5 Click TDM E400 TDM C400 Etherne
17. The NAPT rule on page 125 to submit your changes TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 134 The Pass rule Allowing specific addresses to pass through untranslated You can create a Pass rule to allow a range of IP addresses to remain untranslated when another rule would otherwise do so Figure 56 NAT Rule Add Page Pass Flavor The Pass rule must be assigned a rule ID that is a lower number than the ID assigned to the rule it is intended to pass In you want a specific IP address or range of addresses to not be subject to an existing rule say rule number 5 then you can create a Pass rule with an ID number from 1 to 4 Follow these instructions to add a Pass rule see steps 1 4 under The NAPT rule on page 125 for detailed instructions corresponding to steps 1 and 2 below 1 Display the NAT Rule Add Page select PASS as the Rule Flavor and enter a Rule ID 2 Select the interface on which this rule will be effective 3 In the Local Address From and Local Address To fields type the lowest and highest IP addresses that define the range of private address you want to be passed without translation If you want the Pass rule to act on only one address type that address in both fields 4 Follow steps 7 12 under The NAPT rule on page 125 to submit your changes 135 13 Configuring Firewall Settings Web Configuration provides built in firewall functions enabling you to pro
18. Typically NAT rules are used for communication between your LAN and the Internet Because the device uses the WAN interface which may be named ppp 0 eoa 0 or ipoa 0 to connect your LAN to your ISP it is the usual IFName selection 6 In the Local Address From field and Local Address To fields type the starting and ending IP addresses respectively of the range of private address you use on your network that you want to be translated You can specify that data from all LAN addresses should be translated by typing 0 zero in each From field and 255 in each To field Or type the same address in both fields if the rule only applies to one computer 7 In the Global Address From and Global Address To fields type the public IP address assigned to you by your ISP If you have multiple WAN interfaces in both fields type the IP address of the interface to which this rule applies This rule will not be enforced for data that arrives on other WAN interfaces If you have multiple WAN interfaces and want the rule to be enforced on a range of them type the starting and ending IP addresses of the range 8 Click 9 When a page displays to confirm your change click to return to the NAT Configuration page The new rule should display in the NAT Rule Configuration table 10 Ensure that the Enable radio button is selected and then click A page displays to confirm your changes 11 If you want the changes to be permanent
19. follow the instructions on page 46 to commit them Chapter 12 Configuring Network Address Translation 127 The RDR rule Allowing external access to a LAN computer You can create an RDR rule to make a computer on your LAN such as a Web or FTP server available to Internet users without having to obtain a public IP address for that computer The computer s private IP address is translated to your public IP address in all incoming and outgoing data packets Note Without an RDR rule or Bimap rule described on page 133 the Ethernet Modem Router blocks attempts by external computers to access your LAN computers The following example illustrates using the RDR rule to provide external access to your web server Your ADSL2 Ethernet Modem Router receives a packet containing a request for access to your Web server The packet header contains the public address for your LAN as the destination IP address and a destination port number of 80 Because you have set up an RDR rule for incoming packets with destination port 80 the device recognizes the data as a request for Web server access The device changes the packet s destination address to the private IP address of your Web server and forwards the data packet to it Your Web server sends data packets in response Before the ADSL ADSL2 Ethernet Modem Router forwards them on to the Internet it changes the source IP address in the data packets from the Web server s private addres
20. note that this is not required Your LAN configuration includes two subnets For example the following pool can be created to distribute IP addresses over the Ethernet LAN interface which is assigned IP address 192 168 1 254 by default Pool 0 192 168 1 2 through 192 168 1 254 mask 255 255 255 0 TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 96 The DHCP server distributes addresses to computers connected to one of its interfaces only when that interface is in the same subnet as the pool addresses In the examples shown above the IP addresses in pool 0 would be assigned only over the Ethernet and USB interfaces Adding DHCP Server Address Pools Follow these instructions to create an IP address pool 1 Log into Web Configuration click the LAN tab and then click DHCP Server in the task bar The DHCP Server Configuration page displays Figure 34 DHCP Configuration Page Depending on your pre configured settings the table may display up to two address pools each in a row or may be empty 2 Click The DHCP Server Pool Add page displays Figure 35 DHCP Server Pool Add Page Chapter 8 Configuring Dynamic Host Configuration Protocol 97 3 Enter values for the Start IP Address End IP Address and Net Mask fields which are required and any others as needed Field Description Start End IP Addresses Specifies the lowest and highest addresses in the pool up to a maximum r
21. required When done change the IP properties on the PC so that it is also in the appropriate subnet If your network uses a DHCP server other than the ADSL Ethernet Modem Router to assign IP addresses you can also configure the device to accept and use a LAN IP address assigned by that server Similarly if your ISP performs DHCP serving for your network you can configure the device to accept an IP address assigned from the ISP s server In this mode the ADSL Ethernet Modem Router is considered a DHCP client of your or your ISP s DHCP server Note Ethernet Modem Router itself can function as a DHCP server for your LAN computers as described in Chapter 8 but not for its own LAN interface Follow these steps to change the default LAN IP properties or to configure the LAN interface as a DHCP client 1 Log into Web Configuration and click the LAN tab The LAN Configuration page displays Chapter 4 Configuring the LAN and USB Interfaces 53 Figure 14 LAN Configuration Page Note Depending on the pre configured settings the LAN Configuration or USB Configuration table may not display You cannot create these interfaces using Web Configuration Contact your ISP for assistance The LAN Configuration table displays the following settings Setting Description System Mode Identifies the system operating mode for your device such as Routing mode Bridging mode or both modes simultaneously See Chapter 6 fo
22. see the PPP configuration page for example o A public interface typically connects to the Internet PPP EoA and IPoA interfaces are typically public Packets received on a public interface are subject to the most restrictive set of firewall protections defined in the software Typically the global setting for public interfaces is Deny so that all accesses to your LAN initiated from external computers are denied discarded at the public interface except for those allowed by a specific IP filter rule o A private interface connects to your LAN such as the Ethernet interface Packets received on a private interface are subject to a less restrictive set of protections because they originate within the network Typically the global setting for private interfaces is Accept so that LAN computers have access to the ADSL2 Ethernet Modem Routers Internet connection o The term DMZ de militarized zone in Internet networking terms refers to computers that are available for both public and in network accesses such as a company s public Web server Packets received on a DMZ interface whether from a LAN or external source are subject to a set of protections that is in between public and private interfaces in terms of restrictiveness The global setting for DMZ type interfaces may be set to Deny so that all attempts to access these servers are denied by default the administrator may then configure IP filter rules to allow accesses
23. table will retain each route that it learns from adjacent computers Update Time specifies how frequently the Ethernet Modem Router will send out its routing table to its neighbors 3 In the IFName column select the name of the interface on which you want to enable RIP For communication with RIP enabled devices on your LAN select the LAN interface usually eth 0 For communication with your ISP or a remote LAN select the PPP EoA or other WAN interface used for that connection See page 92 for a description of various interfaces and their names Chapter 11 Configuring the Routing Information Protocol 113 4 Select a metric value for the interface RIP uses a hop count as a way to determine the best path to a given destination in the network The hop count is the sum of the metric values assigned to each port through which data is passed before reaching the destination Among several alternative routes the one with the lowest hop count is considered the fastest path For example if you assign this port a metric of 1 then RIP will add 1 to the hop count when calculating a route that passes through this port If you know that communication via this interface is slower than through other interfaces on your network you can assign it a higher metric value than the others You can select any integer from 1 to 15 5 Select a Send Mode and a Receive Mode The Send Mode setting indicates the RIP version this int
24. the download rate is higher than the upload rate The asymmetrical rates benefit home users because they typically download much more data from the Internet than they upload ATM Asynchronous Transfer Mode A standard for high speed transmission of data text voice and Appendix C Glossary 191 video widely used within the Internet ATM data rates range from 45 Mbps to 2 5 Gbps See also data rate authenticate To verify a user s identity such as by prompting for a password authentication server A server typically located within an ISP s network that stores the usernames passwords certificates and other data needed to verify users logging on to a network See also accounting server binary The base two system of numbers that uses only two digits 0 and 1 to represent all numbers In binary the number 1 is written as 1 2 as 10 3 as 11 4 as 100 etc Although expressed as decimal numbers for convenience IP addresses in actual use are binary numbers e g the IP address 209 191 4 240 is 11010001 10111111 00000100 11110000 in binary See also bit IP address network mask bit Short for binary digit a bit is a number that can have two values 0 or 1 See also binary bridging Passing data from your network to your ISP and vice versa using the hardware addresses of the devices at each location Bridging contrasts with routing which can add more intelligence to data transfers by using network addresses inst
25. 125 TDM E400 TDM C400ADSL2 Ethernet Modem Router User s Manual 200 NAT 193 adding rules 125 BASIC flavor 130 BIMAP flavor 133 default configuration 118 defined 117 Filter flavor 131 global settings 119 NAPT flavor 125 PASS flavor 134 RDR flavor 127 viewing performance statistics 122 NAT Configuration page 119 NAT Rule Configuration page 122 NAT Rule Global Statistics page 121 NAT Rule Statistics page 122 NAT Rule Add page BASIC 130 NAT Rule Add page Bimap 133 NAT Rule Add page Filter 131 NAT Rule Add page NAPT 125 NAT Rule Add page Pass 134 NAT Rule Add page RDR 127 NAT Translation Details page 124 NAT Translations page 123 Navigating 40 Netmask See Network mask Network See LAN Network Address Translation See NAT Network classes 186 Network ID 185 Network interface card 17 Network mask 194 in DHCP address table 99 Network mask 186 NIC 194 Notational conventions 14 Operating mode scenarios 81 Operating modes as displayed in the System View table 78 overview 76 ZIPB 86 Packet 194 Packets filtering 140 Pages Alarm 167 ATM VC Add 59 60 ATM VC Configuration 58 Autodetect 184 Backup Restore Config 179 Blocked Protocols 157 Bridge Configuration 70 79 Bridge Filter Configuration 150 Bridge Filter Rule 151 Bridge Filter Subrul
26. 46 to commit them 89 Part 3 Routing and IP Related Features TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 90 About Part 3 Part 3 explains how to view information relating to Internet Protocol processing and describes configuring the Ethernet Modem Router s IP routing features Part 3 contains the following chapters Chapter 7 Viewing System IP Addresses and IP Performance Statistics shows how to view the IP information associated with the device interfaces and statistics related to IP packet processing Chapter 8 Configuring Dynamic Host Configuration Protocol describes how to configure the Ethernet Modem Router s DHCP server and DHCP relay agent to dynamically assign IP information to your LAN PCs Chapter 9 Configuring DNS Server Addresses describes how to specify the IP addresses for the Domain Name Servers that your LAN will use when accessing the Internet Chapter 10 Configuring IP Routes describes how to create rules that specify the device interfaces through which data packets should be forwarded based on their destination IP addresses Chapter 11 Configuring the Routing Information Protocol explains how to configure a protocol that enables the Ethernet Modem Router to share its routing information with other routers on your LAN or the Internet 91 7 Viewing System IP Addresses and IP Performance Statistics The interfaces on the Ethernet Mo
27. A Windows dialog box will display to enable you to choose where to save the file The file is named commitedcfg cfg and can be opened with any text editor You can change the file name to identify the date or characteristics of the configuration however you must change it back to commitedcfg cfg before restoring it To restore a saved configuration file click A Windows dialog box will display to enable you to select the file which must be named commitedcfg cfg from your PC or network Double click the file and then click The following message displays while the file is being uploaded Loading New Software Please do not interrupt the upgrade process The system will reboot soon Please open a new browser window to continue browsing When the system reboots your connection to the Web Configuration will be suspended and may appear to hang If you want to continue to use Web Configuration wait about 30 seconds and Refresh the browser window e g press lt F5 gt if using Internet Explorer You may need to log in again 181 18 Modifying Port Settings This chapter describes how to modify the Port ID numbers associated with the Ethernet Modem Router s Web FTP and Telnet servers Overview of IP port numbers The header information in an IP data packet specifies a destination port number Routers use the port number along with the IP addresses to forward the packet to its intended recipient For example all IP d
28. Information Protocol See RIP Security levels setting 141 SNMP Host Add page 166 SNTP configuring 43 Software upgrades 177 Stateful inspection 145 Static IP addresses 27 Statically assigned IP addresses 93 Storing an image 179 Submitting vs committing 46 Subnet 195 defined 97 Subnet mask See Network mask Subnet masks 186 System Modify page 44 System Log page 168 System Mode page 80 System requirements for Configuration Manager 38 System requirements 17 TCP IP 195 Telnet port modifying address 181 Testing setup 37 Time and date changing 43 Traceroute using 174 Traps See Alarms Troubleshooting 188 TTL 195 Twisted pair 196 Typographical conventions 14 Upgrading software 177 Upgrading the image 177 Upstream 196 USB 196 configuring IP on PC 31 configuring PC 28 installing 20 installing driver 28 USB cable connecting 30 USB port configuring IP information 55 User Config Modify page 163 User Config Add page 162 User Configuration page 161 User logins managing 161 User privelege levels 161 Username Index 203 default 39 VC 196 VCI 196 VPI 196 WAN 196 WAN interface configuring multiple 92 IP address 91 WAN to WAN bridging configuring 84 Web browser requirements 17 Web browser requirements 38 Web browsers compatible versions 38
29. Mode page where you can enable or disable the corresponding bridging services The Bridge Configuration page also displays a table for specifying the interfaces that support bridging The table may be empty if bridging has not yet been configured Chapter 5 Configuring the WAN Interfaces 71 13 In the interface table select all interface names on which you want to perform bridging and click To enable bridging with your ISP select the EoA interface and the LAN interface s eth 0 and or usb 0 You can enable bridging on an IP enabled EoA interface in this case the same interface will be capable of handling both bridged and routed data packets 14 Click the Bridging Enable Disable link The System Mode page displays Figure 24 System Mode Page You can also access the System Mode page from the task bar in the Home tab 15 Click the Bridging Enabled radio button if not already selected and then click A page will briefly display to confirm your changes and will return you to the Bridge Configuration page 16 If you want the changes to be permanent follow the instructions on page 46 to commit them TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 72 Configuring IPoA Interfaces An IPoA interface can be used to exchange IP packets over the ATM network without using an underlying Ethernet over ATM EoA connection Typically this type of interface is used only in product deve
30. Modem Router If you are using the Ethernet Modem Router with a single computer or hub you can use a straight through or crossover Ethernet cable to attach the PC directly to the device The crossover cable is wired differently than the cable you would use to connect to a hub When you compare the colored wires on each end of a cable they will be in the same sequence on crossover cables they will not Contact your ISP for assistance Step 3 Install USB software and connect the USB cable For Ethernet USB Combo model only You can attach a single computer to the device using a USB cable The USB port is useful if you have a USB enabled PC that does not have a network interface card for attaching to your Ethernet network You must install software on the PC to enable communication see Connecting a computer to the USB port on page 28 Chapter 2 Quick Start 21 Step 4 Attach the power connector Connect the AC power adapter to the Power connector on the back of the device and plug in the adapter to a wall outlet or power strip Turn on and boot up your computer s and any connected LAN devices such as hubs or switches TDM E400 TDM C400 ADSL2 Modem Router User s Manual 22 Quick Start Part 2 Configuring Your Computers Quick Start Part 2 provides instructions for configuring the Internet settings on your computers to work with the Ethernet Modem Router Before you begin By default the E
31. Operating Modes 79 Configuring Routable and Bridgeable Interfaces Making Interfaces Routable IP Enabled A routable or IP enabled interface is simply one that has been assigned an IP address IP enabled interfaces are capable of forwarding IP packets You can assign IP addresses to any LAN or WAN interface For information about assigning IP information to LAN interfaces e g eth 0 and usb 0 see Chapter 4 For information about assigning IP information to WAN interfaces see Chapter 5 Making Interfaces Bridgeable Bridge Enabled When you make an interface bridgeable you enable the software to receive Ethernet packets through that interface for forwarding through the device s other bridgeable interfaces If an interface is not bridgeable it can only forward IP packets assuming the interface has been IP enabled Note If you create a LAN or WAN interface it must be IP enabled bridge enabled or both An interface that has no IP address and is not made bridgeable will not pass any data Follow these instructions to specify which interfaces can perform bridging 1 Log into Web Configuration and click the Bridging tab The Bridge Configuration page displays Figure 30 Bridge Configuration Page The Bridge Configuration page provides links shown in red to the System Mode page where you can enable or disable the corresponding bridging services The Bridge Configuration page also displays a table for spec
32. Router s Web Configuration so that your ISP can log in and manager your system for example Accessing Web Configuration requires accessing the Ethernet Modem Router s own Web server also called its HTTP server In this case you would want to use the Port Settings feature to assign a non standard port number to the Ethernet Modem Router s HTTP server Without a non standard port number the NAT rule would redirect your ISP s log in TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 182 attempt to your LAN HTTP server rather than to the HTTP server on the Ethernet Modem Router Thereafter when your ISP wants to log on to your Web Configuration they would type your IP address in their browser followed by a colon and the non standard port number as shown in this example http 10 0 1 16 61000 Your ISP may also have special circumstances that require changing the port numbers contact them before making any changes here Follow these steps to modify port settings 1 Log into Web Configuration click the Admin tab and then click Port Settings in the task bar The Port Settings page is shown in Figure 85 Figure 85 Port Settings Page 2 Type the new port number s in the appropriate text box es and click The default port numbers are shown in Figure 85 You can enter non standard port numbers in the range 61000 62000 3 Click Commit amp Reboot in the task bar and click to sav
33. Start process should enable any computer on your LAN to use the Ethernet Modem Router to access the Internet To test the connection turn on the device wait about 30 seconds and then verify that its LEDs are illuminated as described in Table 2 Table 2 LED Indicators Label LED Status Color Description 1 PWR ON Green Power supply is connected Blinking Green Training with DSLAM 2 WAN ON Green ADSL link is ready ON Green PPP sync up 3 PPP Blinking Green Data transmitting 4 LAN ON Green Ethernet transmitting 5 USB LAN For Ethernet USB Combo only ON Green USB port is connected If the LEDs illuminate as expected test your Internet connection from a LAN computer and from the USB computer if applicable Open your web browser and type the URL of any external website such as http www yahoo com The LED labeled PPP should be blinking rapidly and may appear solid as the device connects to the site If the LEDs do not illuminate as expected or the web page does not display see Appendix A for troubleshooting suggestions Or contact your ISP for assistance 38 3 Getting Started with the Web Configuration The Ethernet Modem Router includes a preinstalled program called the Web Configuration which provides an interface to the software installed on the device It enables you to configure the device settings to meet the needs of your network You access it through your web brow
34. System View page on the Home tab displays each time you log into the program shown in Figure 11 on page 40 TDM E400 TDM C400 ADSL2 Modem Router User s Manual 40 Functional Layout Web Configuration tasks are grouped into categories which you can access by clicking the tabs at the top of each page Each tab displays the available tasks in a horizontal menu at the top of the page You can click on these menu items to display the specific configuration options Figure 10 Web Interface Functional Layout A new page displays when you click each task in the task bar The left most task displays by default when you click on a new tab The same task may appear in more than one tab when appropriate For example the Lan Config task displays in both the LAN tab and the Routing tab Commonly used buttons The following buttons are used throughout the application Button Function Stores in temporary system memory any changes you have made on the current page See Committing Changes on page 46 for instructions on storing changes permanently Redisplays the current page with updated statistics or settings On pages that display accumulated statistics this button resets the statistics to their initial values Launches the online help for the current topic in a separate browser window Help is available from any main topic page Selected Tab Task bar for this tab Chapter 3 Getting Started with Web Configurat
35. TDM E400 TDM C400 ADSL Modem Router User s Manual 2 Important Rules for Safe Operation In addition to the careful attention devoted to quality standards on the manufacture of your ADSL2 Ethernet Modem Router safety is a major factor in the design of every product However safety is your responsibility too This section lists important information that will help assure your enjoyment and proper use of the ADSL2 Ethernet Modem Router and accessory equipment Please read them carefully before operation and using your Router Read and Follow Instructions you should read all the safety and operating instructions before operating the Router Retain Instructions You should save all the safety and operating instructions for your future reference Heed Warning Comply with all warnings on the products and in the operating instructions Check Power Sources Operate this product only from the type of power source indicated on the product s marking label If you are not sure of the type of power supplied to your home consult your dealer or local power company Be Careful of Overloading Do not overload wall outlets or extension cords as this can result in a risk of fire or electric shock Overloaded AC outlets extension cords frayed power cords damaged or cracked wire insulation and broken plugs are dangerous They may result in a shock or fire hazard Periodically examine the cord and if its appearance indicates
36. adjacent routers A multicast group of computers is one whose members have designated as interested in receiving specific content from the others Multicasting to an IGMP group can be used to Appendix C Glossary 193 simultaneously update the address books of a group of mobile computer users or to send company newsletters to a distribution list Internet The global collection of interconnected networks used for both private and business communications intranet A private company internal network that looks like part of the Internet users access information using web browsers but is accessible only by employees IP See TCP IP IP address Internet Protocol address The address of a host computer on the Internet consisting of four numbers each from 0 to 255 separated by periods e g 209 191 4 240 An IP address consists of a network ID that identifies the particular network the host belongs to and a host ID uniquely identifying the host itself on that network A network mask is used to define the network ID and the host ID Because IP addresses are difficult to remember they usually have an associated domain name that can be specified instead See also domain name network mask ISP Internet Service Provider A company that provides Internet access to its customers usually for a fee LAN Local Area Network A network limited to a small geographic area such as a home office or small building LED Light Emitti
37. again You may be prompted to install files from your Windows 95 98 installation CD Follow the instructions to install the files 7 Click to restart the PC and complete the TCP IP installation Next configure the PCs to accept IP information assigned by the Ethernet Modem Router 8 Open the Control Panel window and then click the Network icon 9 Select the network component labeled TCP IP and then click If you have multiple TCP IP listings select the listing associated with your network card or adapter 10 In the TCP IP Properties dialog box click the IP Address tab 11 Click the radio button labeled Obtain an IP address automatically 12 Click the DNS Configuration tab and then click the radio button labeled Obtain an IP address automatically 13 Click twice to confirm and save your changes You will be prompted to restart Windows 14 Click TDM E400 TDM C400 ADSL2 Modem Router User s Manual 26 Windows NT 4 0 workstations First check for the IP protocol and if necessary install it 1 In the Windows NT task bar click the Start button point to Settings and then click Control Panel 2 In the Control Panel window double click the Network icon 3 In the Network dialog box click the Protocols tab The Protocols tab displays a list of currently installed network protocols If the list includes TCP IP then the protocol has already been enabled Skip to step 9 4 If T
38. and USB Interfaces 51 Connecting Your PCs via Ethernet and or USB 51 Configuring the LAN Ethernet Interface 52 Configuring the USB Interface IP Address 55 5 Configuring WAN Interfaces 57 Configuring the ATM VC 58 Modifying ATM VCs 59 Adding ATM VCs 60 Configuring PPP Interfaces 61 Viewing Your Current PPP Configuration 61 Viewing PPP Interface Details 64 Adding a PPP Interface 66 Configuring EoA Interfaces 67 Adding EoA Interfaces 69 Table of Contents 7 Configuring IPoA Interfaces 72 Adding IPoA Interfaces 74 6 Configuring the System Operating Modes 76 Overview of Bridges and Routers 76 How Bridges Work 76 How Routers Work 77 Overview of System Operating M
39. begin the trace The results display in the window at the bottom of the page and include the IP address of each router or computer reached from the first to last hop and the access time for each packet sent 177 17 Upgrading the Software and Storing and Restoring the Configuration Data All system software is contained in a single file called an image The image is stored in system flash memory and contains the operating system device drivers application code and configuration data The configuration data includes all the customizable settings described in this User s Manual You can upgrade the image by installing a new one provided by your ISP You can also save the current configuration data to a file which you can later restore to system flash Upgrading the Image Your ISP may from time to time notify you that a software upgrade is available Upgrade files may be provided to you in two ways On a CD ROM or other media You can use Web Configuration to upload the file from the CD ROM drive or your PC s hard drive or shared network drive to system flash On remote ISP server You can use Web Configuration download the file and load it to system flash Upgrading Using an Image Stored Locally Follow this procedure if you have obtained an updated image from your ISP and stored the file on your PC CD ROM or other media 1 Insert the media containing the file in your PC s CD ROM disk drive You can access th
40. click to end the DSL connection To restart the connection you can click Although you generally will not need to view the remaining data it may be helpful when troubleshooting connection or performance problems with your ISP You can click to reset all counters to zero and to redisplay the page with newly accumulated values You can click to display the DSL Parameters page which provides data about the configuration of the DSL line TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 170 Figure 76 DSL Parameters Page The DSL Parameters and Status table displays settings preconfigured by the product manufacturer or your ISP The Config Data table lists various types of error and defects measurements found on the DSL line You cannot modify this data From the DSL Status page you can also click to display DSL line performance statistics Figure 77 DSL Statistics Page Chapter 16 Monitoring System Status and Performing Diagnostics 171 The DSL Statistics page reports error data relating to the last 15 minute interval the current day and the previous day At the bottom of the page the Detailed Interval Statistic table displays links you can click on to display detailed data for each 15 minute interval in the past 24 hours For example when you click on 1 4 data displays for the 16 intervals 15 minutes each that make up the previous 4 hours Figure 78 shows an example Figure 78
41. color on the two connectors then it is a straight through type On a cross over type wire 1 on one connector should be the same color as wire 3 on the other The same is true of wires 2 and 6 Verify that your cable is sufficient for your network requirements A 100 Mbit sec network 10BaseTx should use cables labeled CAT 5 A 10Mbit sec network may tolerate lower quality cables Internet Access My PC cannot access Internet Use the ping utility described on page 173 to check whether your PC can communicate with the Ethernet Modem Router s LAN IP address by default 192 168 1 254 If it cannot check the Ethernet cabling If you statically assigned a private IP address to the computer not a registered public address verify the following Check that the gateway IP address on the computer is your public IP address see Quick Start Part 2 Configuring Your Computers for instructions If it is not correct the address or configure the PC to receive IP information automatically Verify with your ISP that the DNS server Appendix B Troubleshooting 189 Problem Troubleshooting Suggestion specified for the PC is valid Correct the address or configure the PC to receive this information automatically Verify that a Network Address Translation rule has been defined on the Ethernet Modem Router to translate the private address to your public IP address The assigned IP address must be within the ran
42. connection to a higher level switchboard for long distance calls That switchboard looks at the area code you dialed and connects you with another switchboard that serves that area This new switchboard in turn may look at the prefix in the number you dialed the middle set of three numbers and connect to a more localized switchboard that handles numbers with that prefix This final switchboard can then look at the last four digits of the phone number to open a connection with the person or company you dialed In comparison when your computer initiates communication over the Internet such as viewing a web page connecting to an web server the data it sends out includes the IP address of the destination computer the phone number All your outgoing requests first go to the same router at your ISP the first switchboard That router looks at the network ID portion of the destination address the area code and determines which next router to send the request to After several such passes the request arrives at a router for the destination network which then uses the host ID portion of the destination IP address the local phone number to route the request to the appropriate computer The network ID and host ID portions of IP addresses are explained in Appendix A With both the telephone and the computer all transactions are initially sent to the same switchboard or router which serves as a gateway to other highe
43. continue The Installer begins copying the necessary installation files to the required locations When complete a window displays prompting you to connect the USB cable to your computer TDM E400 TDM C400 ADSL2 Modem Router User s Manual 30 Figure 5 USB Setup Wizard Prompt for Hardware Plug In 6 Connect the USB cable to the ADSL2 Ethernet Modem Router and to your computer The provided USB cable provided has a flat connector on one end called Type A and a square connector on the other Type B Connect the flat connector to your PC and the square connector to the Ethernet Modem Router See Figure 6 To ADSL Ethernet router To PC Figure 6 USB Cable Connectors If a Microsoft digital signature dialog box again displays click to continue A window displays briefly indicating that the system has found new hardware and the Finished page displays to complete the installation Figure 7 DSL Modem Setup Wizard Finished Page 7 Click You are now finished installing the driver You do not need to restart your computer Proceed to USB Driver Installation Part 2 to configure IP properties on the USB PC Chapter 2 Quick Start 31 USB Driver Installation Part 2 Configuring IP properties on the USB PC Now that the USB driver installation is complete you must configure the USB PC so that its IP properties place it in the same subnet as the Ethernet Modem Router s USB port There are
44. data on how many NAT rules have been invoked and how much data has been translated A page displays similar to the one shown in Figure 46 Chapter 12 Configuring Network Address Translation 121 Figure 46 NAT Rule Global Statistics Page The table provides basic information for each NAT rule you have set up You can click to restart the accumulation of the statistics at their initial values TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 122 Viewing NAT Rules and Rule Statistics To view the NAT rules currently defined on your system select NAT Rule Entry in the NAT Options drop down list The NAT Rule Configuration page displays Figure 47 NAT Rule Configuration Page The NAT Rule Configuration table displays a row containing basic information for each rule For a description of these fields refer to the instructions for adding rules pages 125 through 134 From the NAT Rule Configuration page you can click to add a new rule or use the icons in the right column to delete or view details on a rule To view data on how often a specific NAT rule has been used click in the Action s column A page displays similar to the one shown in Figure 48 Figure 48 NAT Rule Statistics Page The statistics show how many times this rule has been invoked and how many currently active sessions are using this rule You can click to reset the statistics to zeros and to display newly accumulated d
45. down respectively You cannot manually enable or disable the interface a red ball may indicate a problem with the DSL connection or the connection to the ISPs access server Action Icons you can click on to edit or delete the associated EoA interface Not all settings are available on the EoA Interface Modify page To modify the other settings you must delete the interface and create a new one Be sure to submit and commit your changes if you make modifications Adding EoA Interfaces Follow these instructions to add an EoA interface 1 Click the WAN tab and then click EOA in the task bar 2 Click The EoA Interface Add page displays Figure 22 EoA Interface Add Page 3 Select one of the predefined interface names from the EoA Interface drop down list 4 From the Interface Sec Type drop down list select the level of IP Firewall to be used on this interface as defined on page 68 5 In the Lower Interface field select the lower level interface name over which this protocol is being configured If the interface will be used to provide only a bridged connection to your ISP skip to step 8 6 If you are creating the EoA interface to provide a routed Internet connection enter the IP address for the interface in the Conf IP Address field and enter the network mask This address serves as the public IP address for your entire LAN and is usually assigned by your ISP TDM E400 TDM C400 ADS
46. firewall Any method of protecting a computer or LAN connected to the Internet from intrusion or attack from the outside Some firewall protection can be provided by packet filtering and Network Address Translation services FTP File Transfer Protocol A program used to transfer files between computers connected to the Internet Common uses include uploading new or updated files to a web server and downloading files from a web server hop When you send data through the Internet it is sent first from your computer to a router and then from one router to another until it finally reaches a router that is directly connected to the recipient Each individual leg of the data s journey is called a hop hop count The number of hops that data has taken on its route to its destination Alternatively the maximum number of hops that a packet is allowed to take before being discarded see also TTL host A device usually a computer connected to a network HTTP Hyper Text Transfer Protocol HTTP is the main protocol used to transfer data from web sites so that it can be displayed by web browsers See also web browser web site ICMP Internet Control Message Protocol An Internet protocol used to report errors and other network related information The ping command makes use of ICMP IGMP Internet Group Management Protocol An Internet protocol that enables a computer to share information about its membership in multicast groups with
47. not place this product on an unstable surface or support The product may fall causing serious injury to a child or adult as well as serious damage to the product Use Care in Moving Product and Cart Combinations Quick stops excessive force and uneven surfaces may cause the product and cart combination to overturn Unplug Power Before Cleaning Do not use liquid cleaner or aerosol cleaner Use a damp cloth for cleaning 3 Keep Objects Out of Openings Never push objects of any kind into this product through openings as they may touch dangerous voltage or short out parts which could result in a fire or electric shock Never spill liquid on the product Protect From Lightning For added protection for this product during a lightning storm or when it is left unattended and unused for long periods of time unplug it from the wall outlet and disconnect the cable system This will prevent damage to the product due to lightning and power line surges Do Not Remove Covers Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltage or other hazards Unplug this Product From Wall Outlet Carefully as the Power Adaptor May Be Hot Refer Servicing to Qualified Service Personnel Under the Conditions Listed Below When the power supply cord or plug is damaged If liquid has been spilled or objects have fallen into the product If the product has been exposed to
48. of certain types TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 142 Creating IP Filter Rules To create an IP filter rule you set various criteria that must be met in order for the rule to be invoked Use these instructions to add a new IP filter rule Also refer to the examples on page 147 1 On the IP Filter Configuration page click The IP Filter Rule Add page displays Figure 60 IP Filter Rule Add Page Chapter 14 Configuring Filters and Blocking Protocols 143 2 Enter or select data for each field that applies to your rule The following table describes the fields Field Description Rule ID Each rule must be assigned a sequential ID number Rules are processed from lowest to highest on each data packet until a match is found It is recommended that you assign rule IDs in multiples of 5 or 10 e g 10 20 30 so that you leave enough room between them for inserting new rules if necessary Action The action that will be taken when a packet matches the rule criteria The action can be Accept forward to destination or Deny discard the packet Direction Specifies whether the rule should apply to data packets that are incoming or outgoing on the selected interface Incoming refers to packets coming from the LAN and outgoing refers to packets going to the Internet You can use rules that specify the incoming direction to restrict external computers from accessing your LA
49. of software over which the EoA interface will operate This will be an ATM VC interface such as aal5 0 Config IP Address and Netmask The IP address and network mask you want to assign to the interface If the interface will be used for bridging with your ISP and you will not be using the Ethernet Modem Router as a router on your LAN then you do not need to specify IP information If you enable DHCP for this interface then the Configured IP address will serve only as a request to the DHCP server The actual address that is assigned by the ISP may differ if this address is not available Use DHCP When enabled this setting instructs the device to accept IP information assigned dynamically by your ISP s DHCP server If the interface will be used for bridging with your ISP and you will not be routing data through it leave this checkbox unselected Default Route Indicates whether the Ethernet Modem Router uses the IP address assigned to this interface if any as its default route for your LAN Your system can have only one default route See Chapter 10 for an explanation of default routes Gateway Address The external IP address that the ADSL2 Ethernet Modem Router communicates with via the EoA interface to gain access to the Internet This is typically an ISP server Chapter 5 Configuring the WAN Interfaces 69 Field Description Status A green or red ball will display to indicate that the interface is currently up or
50. operates at a lower protocol level While IP filter rules act on IP data packets known as layer 3 data bridge filter rules act on Ethernet and similar packets often referred to as layer 2 or MAC layer data The blocked protocols feature enables you to select from a predefined list the protocol that you want to block All data passed to the ADSL ADSL2 Ethernet Modem Router using a blocked protocol will be discarded without consideration of the source computer destination computer or the device interface on which it was received TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 140 Configuring IP Filters When you define an IP filter rule and enable the feature you instruct the Ethernet Modem Router to examine each data packet it receives to determine whether it meets criteria set forth in the rule The criteria can include the size of the packet the network or internet protocol it carries the direction in which it is traveling for example from the LAN to the Internet or vice versa the IP address of the sending computer the destination IP address and other characteristics of the packet data If the packet matches the criteria established in a rule the packet can either be accepted forwarded towards its destination or denied discarded depending on the action specified in the rule Viewing Your IP Filter Configuration To view your current IP filter configuration log into Web Config
51. protocols This chapter describes how to configure the Ethernet Modem Router to use one of these called the Routing Information Protocol RIP RIP Overview RIP is an Internet protocol you can set up to share routing table information with other routing devices on your LAN at your ISP s location or on remote networks connected via the ADSL line Generally RIP is used to enable communication on autonomous networks An autonomous network is one in which all computers are administered by the same entity An autonomous network may be a single network or a grouping of several networks under the same administration An example of an autonomous network is a corporate LAN including devices that can access it from remote locations such as the computers telecommuters use Using RIP each device sends its routing table to its closest neighbor every 30 seconds The neighboring device in turn passes the information on to its next neighbor and so on until all devices in the autonomous network have the same set of routes When should you configure RIP Most small home or office networks do not need to use RIP they have only one router such as the Ethernet Modem Router and one path to an ISP In these cases there is no need to share routes because all Internet data from the network is sent to the same ISP gateway You may want to configure RIP if any of the following circumstances apply to your network Your home network setup includes
52. rain or water If the product does not operate normally by following the operating instructions Adjust only those controls that are covered by the operating instructions If the product has been dropped or the cabinet has been damaged When the product exhibits a distinct change in performance such as the inability to perform basic functions this indicates a need for service Require Safety Check Upon completion of any service or repairs to this product ask the service technician to perform safety checks recommended by service point to determine that the products is in safe operating condition 5 Table of Contents About this User s Manual 13 Using this Document 14 Notational conventions 14 Typographical conventions 14 Special messages 14 Part 1 Getting Started About Part 1 16 1 Getting to Know the TDM 400 TDM C400 Ethernet Modem Router 17 Features 17 System Requirements 17 Parts Check
53. settings Offset 2 Offset from TCP Header Mask 0x0FFF Cmp Type eq Lower Value 0x0017 The hexadecimal number 0x0017 is binary port number 23 the well known port number for Telnet packets 4 Click the Enable radio button at the top of the Bridge Filter Subrule Add page and then click 5 If necessary enable the Bridge Filter Service by clicking the Enable radio button at the top of the Bridge Filter Configuration page All TCP packets incoming on the ppp 0 interface will now be dropped TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 156 Editing and Deleting Rules and Subrules In the table on the Bridge Filter Rule page the following items display in the Actions column for each rule and subrule Button Description Edits the rule or subrule The Bridge Filter Rule Modify or Bridge Filter Subrule Modify page displays See Adding Bridge Filter Rules for a description of the items on these pages Deletes the rule or subrule Before deleting a rule you must first delete all of its subrules A page displays to enable you to confirm or cancel the deletion The above icons do not display for rules that are preconfigured by the ISP these rules and related statistics can be viewed but not otherwise accessed via the Web based interface Viewing Rule Statistics You can view statistics for each rule and total statistics for all rules To view statistics for an individual rule cli
54. then click Remote Image Upgrade in the task bar The Remote Image Upgrade page displays Figure 83 Remote Image Upgrade Page Note If the page does not display a table as shown in Figure 83 but displays only the Upload button skip to step 5 In this case the download server IP address filename and logon information has already been hard coded into your system 2 In the IP Address text boxes type the IP address of the server from which the file is to be downloaded 3 In the Upgrade File text box type the complete name of the file to be downloaded and installed The file name can be either TEImage bin or TEPatch bin where represents any number of characters 4 In the Username and Password fields type the logon information to the ISP s server if the ISP requires it Chapter 17 Upgrading the Software and Storing and Restoring the Configuration Data 179 5 Click An alert window pops up displaying the following message Image upgrade may take a few minutes after which the system will reboot 6 Click to start the image upgrade The file begins downloading from the ISP s server and loading the image into flash When image upgrade is complete the following message displays Remote Image Upgrade Successful The system will proceed to reboot itself automatically Wait 1 minute to allow the reboot to complete You must refresh your browser and log in again if you want to continue using Web Con
55. two ways to do this The Ethernet Modem Router is configured to assign an appropriate IP address to the USB PC If you want to use this automatic assignment feature called DHCP server you must configure the USB PC to accept dynamically assigned IP information Follow the instruction on pages 22 through 226 that correspond to the operating system installed on your PC If you want to assign a static IP address to the PC follow the instructions on page 27 and use the following information o In the Network and Dial up Connections window be sure to select the icon that corresponds to your new USB connection not the one that corresponds to your Ethernet NIC When you display properties for the icon the following text should display in the Connect Using text box USB IAD LAN Modem n o The USB interface on the Ethernet Modem Router is preconfigured with these properties USB interface IP address 192 168 1 2 USB interface subnet mask 255 255 255 0 Therefore your PC must be configured as follows IP address 192 168 1 n where n is a number from 3 to 253 Subnet mask 255 255 255 0 Default gateway 192 168 1 2 TDM E400 TDM C400 ADSL2 Modem Router User s Manual 32 Chapter 2 Quick Start 33 Quick Start Part 3 Configuring the Ethernet Modem Router In Quick Start Part 3 you log into the program on the Ethernet Modem Router and configure basic settings for your Internet connection Your ISP shoul
56. whether the IPoA protocol to be used complies with the IEFT specification named RFC 1577 Classical IP and ARP over ATM contact your ISP if unsure Chapter 5 Configuring the WAN Interfaces 73 Field Description Lower interface IPoA interfaces are defined in software and then associated with lower level software and hardware structures at the lowest level they are associated with a physical port the WAN port This field should reflect an interface name defined in the next lower level of software over which the IPoA interface will operate This will be an ATM VC interface such as aal5 0 Peer IP Address The IP address of the remote computer you will be connecting to via the WAN interface Config IP Address and Netmask The IP address and network mask you want to assign to the interface If DHCP is enabled this address serves as a request to the remote computer s DHCP server which may assign another address Gateway Address The external IP address that the ADSL ADSL2 Ethernet Modem Router communicates with via the IPoA interface to gain access to the Internet This is typically an ISP server Status A green or red ball will display to indicate that the interface is currently up or down respectively You cannot manually enable or disable the interface a down interface may indicate a problem with the DSL connection or with the remote IPoA computer Action Icons you can click on to edit or delete
57. 0 ADSL Modem Router User s Manual 6 Quick Start Part 3 Configuring the Ethernet Modem Router 33 Logging in to the Ethernet Quick Configuration Page 33 Default Router Settings 35 Testing Your Setup 37 3 Getting Started with the Web Configuration 38 Accessing the Web Configuration 38 Functional Layout 40 Commonly used buttons 40 The Home Page and System View Table 41 Modifying Basic System Information 43 Modifying the Date and Time or Configuring SNTP 43 Specifying the TDM E400 TDM C400 Name and Network Domain Name 45 Committing Changes and Rebooting 46 Committing Changes 46 Rebooting the device using Web Configuration 47 Part 2 Interfaces and Operating Modes About Part 2 50 4 Configuring the LAN
58. 5 Bridge Filter Configuration page 150 Bridge Filter Rule page 151 Bridge Filter Subrule page 153 Bridge filters 150 Bridge forwarding table 76 Bridgeable interfaces 79 82 83 85 Bridged Internet connection configuring 82 Bridge Router AutoSense BRAS 85 Bridges overview 76 Bridging 191 special features 84 Broadband 191 Broadcast 191 Commit amp Reboot page 46 Computers configuring IP information 22 Configuration Manager overview 38 troubleshooting 189 Data packet 117 Date and time changing 43 Default configuration 35 Default gateway 107 De militarized zones 141 Denial of Service 136 DHCP defined 93 191 device modes 94 setting operating mode 101 DHCP Address Table page 99 DHCP client defined 93 DHCP Configuration page 96 101 DHCP relay 191 configuring 94 configuring device as 100 DHCP Relay Configuration page 100 DHCP server 191 configuring 94 configuring the device as 95 TDM E400 TDM C400ADSL2 Ethernet Modem Router User s Manual 198 defined 93 modifying viewing pools 99 pools 93 using a LAN device as 94 using existing on LAN 52 using ISP as 94 viewing assigned addresses 99 DHCP Server Pool Modify page 98 DHCP Server Pool Add page 96 Diagnosing problems after installation 37 Diagnostics page 172 Diagnostics Page Traceroute 175 Diagnostics P
59. C400 Name and Network Domain Name You can specify an easy to remember name for the Ethernet Modem Router and a domain name for the network on which it resides These are used only to simplify access to the Web Configuration program The Name and Domain Name fields display on the System Modify page as shown in Figure 12 on page 44 You can set a name only or a name and domain name together If you specify a name only then the next time you want to access Web Configuration you can type this name in the location box in your Web browser instead of typing the numeric IP address For example if you named the device myrouter and left the Domain Name field blank then you could type the following in your Web browser to access Web Configuration http myrouter If you also specify a domain name for the ADSL2 Ethernet Modem Router the next time you access Web Configuration type the domain name and the device name in your Web browser For example if you entered myrouter in the Name field and mydomain com in the Domain Name field then you would type the following in your Web browser to access Web Configuration http myrouter mydomain com After you enter information in these fields follow steps 3 through 5 on page 44 to save your changes Note Using a name domain instead of the IP address to access Web Configuration will work only when the DNS relay feature is enabled DNS Relay is automatically enabled when the DNS server addre
60. CP IP does not display as an installed component click 5 In the Select Network Protocol dialog box select TCP IP and then click You may be prompted to install files from your Windows NT installation CD or other media Follow the instructions to install the files After all files are installed a window displays to inform you that a TCP IP service called DHCP can be set up to dynamically assign IP information 6 Click to continue and then click if prompted to restart your computer Next configure the PCs to accept IP information assigned by the Ethernet Modem Router 7 Open the Control Panel window and then double click the Network icon 8 In the Network dialog box click the Protocols tab 9 In the Protocols tab select TCP IP and then click 10 In the Microsoft TCP IP Properties dialog box click the radio button labeled Obtain an IP address from a DHCP server 11 Click twice to confirm and save your changes and then close the Control Panel Chapter 2 Quick Start 27 Assigning static Internet information to your PCs In some cases you may want to assign Internet information to some or all of your PCs directly often called statically rather than allowing the ADSL Ethernet Modem Router to assign it This option may be desirable but not required if You have obtained one or more public IP addresses that you want to always associate with specific computers for example if
61. CP information assigned by a DHCP server 1 Open the Windows Control Panel and display the computer s Networking properties Configure the TCP IP properties to Obtain an IP address automatically the actual text may vary depending on your operating system For detailed instructions see Quick Start Part 2 Configuring Your Computers for instructions Next you specify the IP address of the DHCP server and select the interfaces on your network that will be using the relay service 2 Log into the Web Configuration click the LAN tab and then click DHCP Relay in the task bar The DHCP Relay Configuration page displays Figure 38 DHCP Relay Configuration Page 3 In the DHCP Server Address fields type the IP address of your ISP s DHCP server If you do not have this address it is not essential to enter it here Requests for IP information from your LAN will be passed to the default gateway which should route the request appropriately 4 Select the device s WAN interface from the drop down list and click The WAN interface may be named ppp 0 eoa 0 or ipoa 0 Contact your ISP if you are unsure which type to use Note that you can also delete an interface from the table by clicking in the right column Chapter 8 Configuring Dynamic Host Configuration Protocol 101 5 Click A page displays to confirm your changes and the program returns to the DHCP Relay Configuration page 6 Follow th
62. Cs to use the ADSL Ethernet Modem Router s LAN IP address as their DNS server address using either of the following methods by assigning the LAN IP address statically to each PC by inputting the LAN IP address or the address 0 0 0 0 as the DNS address in the DHCP server pool used by the PCs 2 If using a PPP connection to the ISP click the Use DNS check box so that the DNS server addresses it learns are used for DNS relay Or If not using a PPP connection or if you want to specify DNS addresses in addition to those learned through PPP configure the DNS addresses on the ADSL2 Ethernet Modem Router as follows Chapter 9 Configuring DNS Server Address 105 a Click the Services tab and then click DNS in the task bar The DNS Configuration page displays Figure 40 DNS Configuration Page b Type the IP address of the DNS server in an empty row and click You can enter up to two addresses c Click the DNS Relay Poll Status check box if you want the software to send regular test messages to the DNS servers to ensure that they remain up recommended If none of the specified DNS servers respond including any acquired by PPP which do not display in the table then an alert will display in the System Log window see the Admin tab System Log page You can specify the interval in minutes between each DNS poll message in the DNS Relay Poll Timeout text box d Click the Enable radio button and then click
63. DSL Interval Statistics Page TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 172 Using Diagnostics The diagnostics feature executes a series of test of your system software and hardware connections Use this feature when working with your ISP to troubleshoot problems Running the Diagnostics Program Follow these instructions to begin the diagnostics program 1 Log into Web Configuration click the Admin tab and then click Diagnostics in the task bar The Diagnostics page displays Figure 79 Diagnostics Page 2 From the WAN Interface drop down list select the name of the WAN interface you want to test 3 Click The diagnostics utility runs a series of test to check whether the device s connections are up and working This takes only a few seconds and the results for each test are displayed on screen Pass Fail or Skipped A test may be skipped if the program determines that no suitable interface is configured on which to run the test You can click Help to display an explanation of each test Work with your ISP to interpret the results of the diagnostic tests Chapter 16 Monitoring System Status and Performing Diagnostics 173 Using the Ping Utility Ping is a command you can use to check whether your PC can recognize other computers on your network and the Internet A ping command sends a message to the computer you specify If the computer receives the message it sends messages in rep
64. For example consider a class C network 192 168 1 To split this into two subnets you would use the subnet mask 255 255 255 128 It s easier to see what s happening if we write this in binary 11111111 11111111 11111111 10000000 As with any class C address all of the bits in field1 through field 3 are part of the network ID but note how the mask specifies that the first bit in field 4 is also included Since this extra bit has only two values 0 and 1 this means there are two subnets Each subnet Appendix A IP Addresses Network Masks and Subnets 187 uses the remaining 7 bits in field4 for its host IDs which range from 0 to 127 instead of the usual 0 to 255 for a class C address Similarly to split a class C network into four subnets the mask is 255 255 255 192 or 11111111 11111111 11111111 11000000 The two extra bits in field4 can have four values 00 01 10 11 so there are four subnets Each subnet uses the remaining six bits in field4 for its host IDs ranging from 0 to 63 Note Sometimes a subnet mask does not specify any additional network ID bits and thus no subnets Such a mask is called a default subnet mask These masks are Class A 255 0 0 0 Class B 255 255 0 0 Class C 255 255 255 0 These are called default because they are used when a network is initially configured at which time it has no subnets 188 B Troubleshooting This appendix suggests solutions for problems
65. L2 Ethernet Modem Router User s Manual 70 7 If your ISP will assign the IP address from their DHCP server click the Enable radio button in the Use DHCP field When DHCP is enabled the address you entered in the Conf IP Address field will be requested from the DHCP server the server many assign a different address if necessary 8 If you are using the EoA interface to provide a routed connection to your ISP and you want the EoA interface to serve as the default route for Internet access for your LAN ensure that the Default Route Enable radio button is selected If you have more than on WAN interface note that only one of them can be specified as the default route If you are using the interface to provide a bridged connection then deselect this field 9 In the Gateway IP Address field enter the address of your ISP s access server 10 Click A confirmation page displays to confirm your changes 11 Click to return to the EoA page and view the new interface in the table If the interface will be used to provide only a routed connection to your ISP skip to step 16 If the interface will be used to provide a bridged only connection or a bridged and routed connection to your ISP then continue with step 12 to enable bridging 12 Click the Bridging tab The Bridge Configuration page displays Figure 23 Bridge Configuration Page The Bridge Configuration page provides links shown in red to the System
66. N Interface The interface on the Ethernet Modem Router on which the rule will take effect See the examples on page 147 for suggestions on choosing the appropriate interface for various rule types In Interface The interface from which packets must have been forwarded to the interface specified in the previous selection This option is valid only for the outgoing direction Log Option When Enabled is selected a log entry will be created on the system each time this rule is invoked The log entry will include the time of the violation the source address of the computer responsible for the violation the destination IP address the protocol being used the source and destination ports and the number violations occurring in the previous x minutes Logging may be helpful when troubleshooting This information can also be e mailed to designated administrators See Chapter 13 Configuring Firewall Settings for instructions Security Level The security level that must be enabled globally for this rule to take affect A rule will be active only if its security level is the same as the globally configured setting shown on the main IP Filter Configuration page For example if the rule is set to Medium and the global firewall level is set to Medium then the rule will be active but if the global firewall level is set to High or Low then the rule will be inactive TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Man
67. P Configuration 112 RIP Global Statistics 114 SNMP Host Add 166 System Log 168 System Mode 80 System Modify 44 User Config Add 162 User Config Modify 163 User Configuration 161 Parts checking for 18 PASS NAT flavor 134 Password default 39 recovering 189 PC configuration 22 PC Configuration static IP addresses 27 Performance statistics 92 Ping 173 194 Port 194 Port IDs using with NAT 129 Port numbers using non standard 129 Port settings 181 Port Settings page 182 Power connector 21 PPP 194 settings 62 64 PPP Detail page 64 PPP Configuration page 61 PPP interface 91 PPP Interface Add page 66 PPPoA 194 PPPoE 194 Privilege levels 161 Protocol 194 TDM E400 TDM C400ADSL2 Ethernet Modem Router User s Manual 202 Quick Configuration logging in 33 Quick Configuration page 33 RDR NAT flavor 127 Rebooting 47 Remote Image Upgrade page 178 Reset button 47 Restoring an image 179 RFC 1577 IPoA 72 RIP 194 configuring on device 112 overview 111 viewing statistics 114 RIP Configuration page 112 RIP Global Statistics page 114 RJ 11 195 RJ 45 195 Routable interfaces 79 Routed and bridged Internet connection configuring 83 Routed Internet connection configuring 81 Routers overview 77 Routing 195 Routing and bridging mode 82 Routing
68. P address of the Domain Name System server and Secondary Domain Name System server to be used by computers that receive IP addresses from this pool These DNS servers translate common Internet names that you type into your web browser into their equivalent numeric IP addresses Typically these servers are located with your ISP SMTP SWINS optional The IP addresses of devices that perform various services for computers that receive IP addresses from this pool such as the SMTP or Simple Mail Transfer Protocol server which handles e mail traffic Contact your ISP for these addresses TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 98 4 When you are done defining the pool click A confirmation page displays briefly to indicate that the pool has been added successfully After a few seconds the DHCP Server Pool Add page displays with the newly added pool 5 Follow the instructions in Setting the DHCP Mode on page 101 to enable the DHCP Server Viewing modifying and deleting address pools To view modify or delete an existing address pool display the DHCP Server Configuration page and click the icons in the corresponding row in the address pool table To delete an IP address pool click then submit and commit your changes To view details on an IP address pool click A page displays with the same information that you entered when you added the pool To modify the pool click
69. P server relay agent or client If you configure the device as a DHCP server it will maintain the pool of addresses and distribute them to your LAN computers If the pool of addresses includes private IP addresses you must also configure the Network Address Translation service so that the private addresses can be translated to your public IP address on the Internet If your ISP performs the DCHP server function for your network then you can configure the device as a DHCP relay agent When a computer logs onto the network the Ethernet Modem Router contacts the ISP for the necessary IP information which it relays back to the computer If you have another PC or device on your network already performing the DHCP server function then you can configure the device s LAN interface to be a DHCP client of that server as are your PCs This configuration is described in Chapter 4 Note You can input settings for both DHCP server and DHCP relay mode and then activate either mode at any time Deactivated settings are retained for your future use Chapter 8 Configuring Dynamic Host Configuration Protocol 95 Configuring DHCP Server Note Before you begin be sure to configure your PCs to accept DHCP information assigned by a DHCP server See Quick Start Part 2 Configuring Your Computers for instructions To set up DHCP server you first define the ranges of IP addresses that you want to be distributed to your PCs call
70. QUENTIAL INDIRECT SPECIAL OR PUNITIVE DAMAGES OF ANY KIND OR FOR LOSS OF REVENUE OR PROFITS LOSS OF BUSINESS LOSS OF INFORMATION OR DATE OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE USE PERFORMANCE FAILURE OR INTERRUPTION OF THE POSSIBILITY OF SUCH DAMAGES AND LIMITS ITS LIABILITY TO REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT TRENDNET S OPTION THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE Governing Law This Limited Warranty shall be governed by the laws of the state of California Note AC DC Power Adapter Cooling Fan and Power Supply carry 1 Year Warranty Index 205
71. Rule Flavor and enter a Rule ID 2 Select the interface on which this rule will be effective TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 132 3 Select a protocol to which this rule applies or choose ANY This selection specifies which type of Internet communication will be subject to this translation rule You can select ANY if the rule applies to all data Or select TCP UDP ICMP or a number from 1 255 that represents the Internet Assigned Numbers Authority IANA specified protocol number 4 In the Local Address From and Local Address To fields type the starting and ending IP addresses that identify the range of private address you want to be translated Or type the same address in both fields If you specify a range each address will be translated in sequence to a corresponding address in a range of global addresses which you specify in step 5 The address or range of addresses should correspond to private address or addresses already in use on your network These may be assigned statically to your PCs or dynamically using DHCP as discussed in the Quick Start chapter 5 In the Global Address From and Global Address To fields type the starting and ending address that identify the range of public IP addresses to translate your private addresses to Or type the same address in both fields if you also specified a single address in step 4 6 In the Destination Address From To fields spec
72. WAN to WAN bridging refers to the bridging of data between WAN interfaces This can occur only when bridging is enabled on the device and it has two or more WAN interfaces With WAN to WAN bridging enabled if a packet with an unknown destination address is received from a WAN interface that packet is forwarded to all the other ports including the other bridge enabled WAN interface s This ability may not however be desirable for all users due to security concerns and bandwidth constraints If this is the case WAN to WAN bridging should be disabled Follow this procedure to enable or disable WAN to WAN bridging 1 Click the Bridging tab 2 In the interface table select all WAN interfaces and any others on which you want to perform bridging and click 3 Click the WAN to WAN bridging Enable Disable link 4 On the System Mode Page click the WAN to WAN Bridging Enabled or Disabled radio button and then click A page will display briefly to confirm your changes and will return you to the Bridge Configuration page 5 If you want the changes to be permanent follow the instructions on page 46 to commit them Chapter 6 Configuring the System Operating Modes 85 Configuring Bridge Router AutoSense BRAS Mode In Bridge Router AutoSense BRAS mode the Ethernet Modem Router chooses at startup whether to operate in Routing and Bridging mode or in Bridging only mode based on information it learns while com
73. Windows NT configuring IP information 26 ZIPB mode configuring 86 TDM E400 TDM C400ADSL2 Ethernet Modem Router User s Manual 204 Limited Warranty TRENDnet warrants its products against defects in material and workmanship under normal use and service for the following lengths of time from the date of purchase ADSL Modem Router 5 years If a product does not operate as warranted above during the applicable warranty period TRENDnet shall at its option and expense repair the defective product or deliver to customer an equivalent product to replace the defective item All products that are replaced will become the property of TRENDnet Replacement products may be new or reconditioned TRENDnet shall not be responsible for any software firmware information or memory data of customer contained in stored on or integrated with any products returned to TRENDnet pursuant to any warranty There are no user serviceable parts inside the product Do not remove or attempt to service the product through any unauthorized service center This warranty is voided if i the product has been modified or repaired by any unauthorized service center ii the product was subject to accident abuse or improper use iii the product was subject to conditions more severe than those specified in the manual Warranty service may be obtained by contacting TRENDnet office within the applicable warranty period for a Return Material Authorizati
74. additional changes required to the product settings Part 1 contains the following chapters Chapter 1 Getting to Know the describes the product features and provides a parts list Chapter 2 Quick Start provides instructions for setting up the hardware and for performing initial configuration of the Ethernet Modem Router and your LAN PCs Chapter 3 Getting Started with the Web Configuration provides basic instructions for using the Ethernet Modem Router s configuration program Detailed instructions for modifying each setting are provided in subsequent chapters 17 1 Getting to Know the TDM 400 TDM C400 Ethernet Modem Router Features Internal ADSL2 modem for high speed Internet access 10 100Base T Ethernet Modem Router to provide Internet connectivity to all computers on your LAN USB port for connecting a USB enabled PC For Ethernet USB combo model only Network address translation NAT firewall and IP filtering functions to provide security for your LAN Network configuration through DHCP Server and DHCP Relay Services including IP route and DNS server configuration RIP and IP and DSL performance monitoring Configuration program you access via your Web browser System Requirements In order to use the Ethernet Modem Router you must have the following ADSL ADSL2 ADSL2 service up and running on your telephone line One or more computers each containing an Ethernet 10Base T 100Base T networ
75. al SNMP Statistics 166 16 Monitoring System Status and Performing Diagnostics 167 Viewing System Alarms 167 Viewing the Alarm Table 167 Viewing the System Log 168 Viewing DSL Information 169 Using Diagnostics 172 Running the Diagnostics Program 172 Using the Ping Utility 173 Using the Traceroute Utility 174 17 Upgrading the Software and Storing and Restoring the Configuration Data 177 Upgrading the Image 177 Upgrading Using an Image Stored Locally 177 Uploading an Image Stored Remotely 178 Storing and Restoring Configuration Settings 179 18 Modifying Port Settings 181 Overview of IP port numbers 181 Modifying the Ethernet Modem Router s Port Numbers 181 19 Configuring Autodetect
76. an additional router or RIP enabled PC other than the Ethernet Modem Router The Ethernet Modem Router and the router will need to communicate via RIP to share their routing tables Your network connects via the ADSL line to a remote network such as a corporate network In order for your LAN to learn the routes used within your corporate network they should both be configured with RIP Your ISP requests that you run RIP for communication with devices on their network TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 112 Configuring the Ethernet Modem Router s Interfaces with RIP The following instructions describe how to enable RIP on the Ethernet Modem Router Note In order for the Ethernet Modem Router to communicate with other devices using RIP you must also enable the other devices to use the protocol See the product documentation for those devices 1 Log into the Web Configuration click the Services tab and then click RIP in the task bar The RIP Configuration page displays Figure 43 RIP Configuration Page The page contains radio buttons for enabling or disabling the RIP feature and a table listing interfaces on which the protocol is currently running The first time you open this page the table may be empty 2 If necessary change the Age and Update Time values These are global settings for all interfaces that use RIP Age is the amount of time in seconds that the device s RIP
77. ands of telephone lines and ends with four digits that identify one specific line in that group Similarly IP addresses contain two kinds of information Network ID Identifies a particular network within the Internet or intranet Host ID Identifies a particular computer or device on the network The first part of every IP address contains the network ID and the rest of the address contains the host ID The length of the network ID depends on the network s class see following section Table 3 shows the structure of an IP address Table 3 IP Address structure Field1 Field2 Field3 Field4 Class A Network ID Host ID Class B Network ID Host ID Class C Network ID Host ID Here are some examples of valid IP addresses Class A 10 30 6 125 network 10 host 30 6 125 Class B 129 88 16 49 network 129 88 host 16 49 Class C 192 60 201 11 network 192 60 201 host 11 TDM E400 TDM C400ADSL2 Ethernet Modem Router User s Manual 186 Network classes The three commonly used network classes are A B and C There is also a class D but it has a special use beyond the scope of this discussion These classes have different uses and characteristics Class A networks are the Internet s largest networks each with room for over 16 million hosts Up to 126 of these huge networks can exist for a total of over 2 billion hosts Because of their huge size these networks are used for WANs and by organizations a
78. ange of 254 addresses For example if the LAN interface is assigned IP address 192 168 1 254 then you could create a pool with address range 192 168 1 3 192 168 1 253 for distribution to your LAN computers Mac Address A MAC address is a manufacturer assigned hardware ID that is unique for each device on a network Use this field only if you want to assign a specific IP address to the computer that uses this MAC address If you type a MAC address here you must have specified the same IP address in both the Start IP Address and End IP Address fields Net Mask Specifies which portion of each IP address in this range refers to the network and which portion refers to the host computer For a description of network masks and LAN network masks see Appendix A You can use the network mask to distinguish which pool of addresses should be distributed to a particular subnet as explained on page 95 Domain Name A user friendly name that refers to the subnet that includes the addresses in this pool This is used for reference only Gateway Address The address of the default gateway for computers that receive IP addresses from this pool If no value is specified then the appropriate LAN eth 0 or USB usb 0 port address on the device will be distributed to each PC as its gateway address depending on how each is connected See Hops and gateways on page 107 for an explanation of gateway addresses DNS SDNS Address The I
79. as described on 161 The user name can be up to 128 characters but cannot contain spaces or special characters The password can also be up to 128 characters Be sure to retype the password in the Confirm Password text box exactly as before including lowercase and uppercase characters 4 Click 5 If you want the changes to be permanent follow the instructions on page 46 to commit them You cannot change or delete the default login To delete a subsequently created login click in the corresponding Action s column in the table on the User Configuration page Chapter 15 Managing Access to the Configuration Program 163 Changing Login Passwords Users of all privilege levels can modify their own password Only users with Root privileges can modify other users passwords Follow these instructions to change a login password Note This user ID and password are used only for logging into the Web Configuration it is not the same as the PPP login you may use to connect to your ISP described in Chapter 5 1 From the User Configuration page click next to the login whose password you want to modify The User Config Modify page displays Figure 69 User Config Modify Page 2 Type your current password in the Old Password text box 3 Type your new password in both the New Password and Confirm New text boxes The password can be up to 128 ASCII characters long When logging in you must type the new pa
80. at is outside the specified range self the IP address of the ADSL ADSL2 Ethernet Modem Router interface on which this rule takes effect bcast destination address only Specifies that the rule will be invoked for any packets sent to the broadcast address for the receiving interface The broadcast address is used to send packets to all hosts on the LAN or subnet connected to the specified interface When you select this option you do not need to specify the address so the address fields are dimmed Chapter 14 Configuring Filters and Blocking Protocols 145 Field Description Protocol The basic IP protocol criteria that must be met for rule to be invoked Using the options in the drop down list you can specify that packets must contain the selected protocol eq that they must not contain the specified protocol neq or that the rule can be invoked regardless of the protocol any TCP UDP and ICMP are common IP protocols others can be identified by number from 0 255 as defined by the Internet Assigned Numbers Authority IANA Apply Stateful Inspection When this option is enabled packets are monitored for their state i e whether a packet is the initiating packet or a subsequent packet in an ongoing communication etc This option provides a degree of security by blocking dropping packets that are not received in the anticipated state Such packets can signify an unwelcome attempt to gain access to a network
81. ata Chapter 12 Configuring Network Address Translation 123 Viewing Current NAT Translations To view a list of NAT translations that have recently been performed and which remain in effect for any of the defined rules select NAT Translations from the NAT Options drop down list The NAT Translations page displays Figure 49 NAT Translations Page For each current NAT translation session the table contains the following fields Field Description Trans Index The sequential number assigned to the IP session used by this NAT translation session Rule ID The ID of the NAT rule invoked Interface The device interface on which the NAT rule was invoked from the rule definition Protocol The IP protocol used by the data packets that are undergoing translations from the rule definition Example TCP UDP ICMP Alg Type The Application Level Gateway ALG if any that was used to enable this NAT translation ALGs are special settings that certain applications require in order to work while NAT is enabled NAT Direction The direction Inside or Outside of the translation A NAT direction is assigned to each interface the Ethernet and USB interfaces are defined as inside and the WAN interfaces are defined as outside The NAT direction is determined by the interface on which the rule is invoked Entry Age The elapsed time in seconds of the NAT translation session You can click in the Action column to v
82. ata packets that the ADSL2 Ethernet Modem Router receives from the Internet specify the same IP address your public IP address as the destination However depending on the port number contained in a data packets the ADSL2 Ethernet Modem Router may pass the packet on to its embedded Web or Telnet servers or to another computer on the network The Internet community has developed a list of common server types such as HTTP Telnet e mail and many others and has defined port numbers that can be assigned each This is not a mandatory scheme but is useful in promoting communication between separately administered LANs Modifying the Ethernet Modem Router s Port Numbers In some cases you may want to assign non standard port numbers to the HTTP and Telnet servers that are embedded on the Ethernet Modem Router The following scenario is one example in which changing the HTTP port number may be necessary You have an externally visible Web server on your LAN with a NAT rule RDR flavor that redirects incoming HTTP packets to that Web server When incoming packets contain a destination IP address of your public IP address which is assigned to the ADSL2 Ethernet Modem Router s WAN interface and the standard Web server port number of 80 the NAT rule recognizes the port number and redirects the packets to your Web server s local IP address Assume in this scenario that you also want to enable external access to the Ethernet Modem
83. ated by a network administrator for use only on a LAN whereas a public IP address is purchased from the Internet Corporation for Assigned Names and Numbers ICANN for use on the Internet Typically your ISP provides a public IP address for your entire LAN and you define the private addresses for computers on your LAN In a typical NAT setup your ISP provides you with a single public IP address to use for your entire network Then you assign each computer on your LAN a unique private IP address Or you define a pool of private IP addresses for dynamic assignment to your computers as described in Chapter 8 On the Ethernet Modem Router you set up a NAT rule to specify that whenever one of your computers communicates with the Internet that is it sends and receives IP data packets its private IP address which is referenced in each packet will be replaced by the LAN s public IP address Definitions An IP data packet contains bits of data bundled together in a specific format for efficient transmission over the Internet Such packets are the building blocks of all Internet communication Each packet contains header information that identifies the IP address of the computer that initiates the communication the source IP address the port number that the router associates with that computer the source port number the IP address of the targeted Internet computer the destination IP address and other information When thi
84. b is a lower cost solution than 802 11a but may be subject to signal interference from other devices operating in the same range such as microwave ovens or cordless phones 802 11g An IEEE standard for wireless communication providing bandwidth up to 54 Mbps and signals in the unregulated 2 4 GHz frequency range 802 11g is backwards compatible with 802 11b but offers greater bandwidth for supporting simultaneous users and a higher maximum speed 802 1x An IEEE protocol that specifies a sequence of messages and responses for authentication exchanges occur among ends user stations attempting to log on to a network the network node that handles such requests and an authentication server that stores user authentication data See also authentication server and RADIUS access point In a wireless local area network WLAN an access point is a station that transmits and receives data sometimes referred to as a transceiver The access point often serves as the point of interconnection between the WLAN and a fixed wire network such as a DSL line or Ethernet network accounting server A server typically located within an ISP s network that collects data relating to user login attempts and service usage often for the purpose of providing data for billing ADSL Asymmetric Digital Subscriber Line The most commonly deployed flavor of DSL for home users The term asymmetrical refers to its unequal data rates for downloading and uploading
85. based on the Internet Group Management Protocol Chapter 3 Getting Started with Web Configuration 43 Modifying Basic System Information You can modify the system date and time or configure the device to acquire this information from an ISP server You can also assign a name to the Ethernet Modem Router and to the network domain in which it resides Modifying the Date and Time or Configuring SNTP You can set the system date and time manually or enable the SNTP feature so that the device acquires this information from an ISP server When you set the date and time manually the information will be held only as long as the device stays on if power is turned off or you reboot the date and time revert to default values and must again be updated When you enable SNTP Simple Network Time Protocol the device connects to an ISP server that provides the date and time information You cannot use Web Configuration to specify the IP address of this server it must have been included as a preconfigured software setting Verify with the ISP that they have provided an SNTP server address in the configuration before enabling this service Note Setting the Ethernet Modem Router date and time whether manually or through SNTP does not affect the date and time on your PCs Follow these instructions to change the system date and time or enable SNTP 1 At the bottom of the Home page click The System Modify page displays in a se
86. ber of protocols that the VC can carry as directed by your ISP 3 Click 4 On the confirmation page click to return to the ATM VC Configuration page 5 If you want the changes to be permanent follow the instructions on page 46 to commit them If you already have defined a higher level PPP EoA or IPoA interface that uses this VC then you can verify that the new settings work by attempting to access the Internet from a LAN USB computer Contact your ISP for troubleshooting assistance TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 60 Adding ATM VCs You can create an ATM VC interface if none has been predefined on your system or if you use multiple services with your ISP Each service may require its own VC Follow these instructions to add a VC 1 From the ATM VC Configuration page click The ATM VC Add page displays Figure 17 ATM VC Add Page 2 Select an interface name from the VC Interface drop down list The list begins with the next available ATM VC interface name in sequential order 3 Enter the VPI and VCI values assigned by your ISP and select the mux type from the drop down list 4 In the Max Proto per AAL5 text box enter the number of higher level protocols PPP EoA and IPoA that the ISP indicated that you will need to configure to operate over this VC For many users only one is required 5 Click 6 When the confirmation page displays click
87. ble lists the following information Field Description IP Address The address that has been leased from the pool Netmask The network mask associated with the leased address This identifies the network ID and host ID portions of the address see Appendix A for an explanation of these terms Mac Address The unique hardware ID of the computer to which the IP address has been assigned Pool Start The lower boundary of the address pool shown here to identify the pool from which the leased address was assigned Address Type Can be Static or Dynamic Static indicates that the IP number has been assigned permanently to the specific hardware device Dynamic indicates that the number has been leased temporarily for a specified length of time Time Remaining The amount of time left for the device to use the assigned address The default lease time is 30 days 31536000 seconds TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 100 Configuring DHCP Relay Some ISPs perform the DHCP server function for their customers home small office networks In this case you can configure the device as a DHCP relay agent When a computer on your network requests Internet access the Ethernet Modem Router contacts your ISP to obtain an IP address and other information and then forwards that information to the computer Follow these instructions to configure DHCP relay First you must configure your PCs to accept DH
88. c function of the computer connected to it and therefore can limit the types of data that pass to and from the computer For example Web HTTP servers are usually identified by port number 80 packets containing traffic destined for a Web server will contain this port ID The Internet Assigned Numbers Authority IANA assigns port numbers for common types of servers and functions 7 If the LAN computer that you are making publicly available is configured to use a non standard port number for the type of traffic it receives type the non standard port number in the Local Port field This option translates the standard port number in packets destined for your LAN computer to the non standard number you specify For example if your Web server uses non standard port 2000 but you expect incoming data packets to refer to standard port 80 you would enter 2000 here and select HTTP or type 80 in the Destination Port fields The headers of incoming packets destined for port 80 will be modified to refer to port 2000 The packet will then be routed appropriately to the web server 8 Follow steps 8 11 under The NAPT rule on page 125 to submit your changes TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 130 The Basic rule Performing 1 1 translations The Basic flavor translates the private LAN side IP address to a public WAN side address like NAPT rules However unlike NAPT rules Basic rules do not also tra
89. cal Area Connection Properties dialog box select Internet Protocol TCP IP and then click 11 In the Internet Protocol TCP IP Properties dialog box click the radio button labeled Obtain an IP address automatically Also click the radio button labeled Obtain DNS server address automatically 12 Click twice to confirm and save your changes and then close the Control Panel TDM E400 TDM C400 ADSL2 Modem Router User s Manual 24 Windows Me PCs 1 In the Windows task bar click the Start button point to Settings and then click Control Panel 2 Double click the Network and Dial up Connections icon 3 In the Network and Dial up Connections window right click the Network icon and then select Properties The Network Properties dialog box displays with a list of currently installed network components If the list includes Internet Protocol TCP IP then the protocol has already been enabled Skip to step 11 4 If Internet Protocol TCP IP does not display as an installed component click 5 In the Select Network Component Type dialog box select Protocol and then click 6 Select Microsoft in the Manufacturers box 7 Select Internet Protocol TCP IP in the Network Protocols list and then click You may be prompted to install files from your Windows Me installation CD or other media Follow the instructions to install the files 8 If prompted click to restart your computer with th
90. can click on to delete a route TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 110 Adding IP Routes Follow these instructions to add an IP route to the routing table 1 From the IP Route Table page click The IP Route Add page displays Figure 42 IP Route Add Page 2 Specify the destination network mask and gateway or next hop for this route For a description of these fields refer to the table on page 109 To create a route that defines the default gateway for your LAN enter 0 0 0 0 in both the Destination and Netmask fields Enter your ISP s IP address in the Gateway NextHop field Note that you cannot specify the interface name route type or route origin These parameters are used only for routes that are identified automatically as the device communicates with other routing devices For routes you create the routing table displays system default values in these fields 3 Click 4 On the confirmation page click to return to the IP Route table The IP Routing Table will now display the new route 5 If you want the changes to be permanent follow the instructions on page 46 to commit them 111 11 Configuring the Routing Information Protocol The Ethernet Modem Router can be configured to communicate with other routing devices to determine the best path for sending data to its intended destination Routing devices communicate this information using a variety of IP
91. ce to keep any data addressed directly to it rather than route the data through the default interfaces TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 92 If your device has additional IP enabled interfaces the IP addresses of these will also display Viewing IP Performance Statistics You can view statistics on the processing of Internet protocol packets a packet is a collection of data that has been bundled for transmission You will not typically need to view this data but you may find it helpful when working with your ISP to diagnose network and Internet data transmission problems To view global IP statistics click on the IP Address Table page Figure 33 shows the IP Global Statistics page Figure 33 IP Global Statistics Page To display updated statistics showing any new data since you opened the page click 93 8 Configuring Dynamic Host Configuration Protocol You can configure your network and Ethernet Modem Router to use the Dynamic Host Configuration Protocol DHCP This chapter provides an overview of DHCP and instructions for implementing it on your network Overview of DHCP What is DHCP DHCP is a protocol that enables network administrators to centrally manage the assignment and distribution of IP information to computers on a network When you enable DHCP on a network you allow a device such as the Ethernet Modem Router or a router located with your ISP to ass
92. chapters Chapter 15 Managing Access describes how to manage user IDs and passwords for logging in to Web Configuration and how to enable your ISP to configure the device remotely Chapter 16 Monitoring System Status and Performing Diagnostics describes how to view information on system events and DSL line performance how to run the diagnostic utility to troubleshoot system problems and how to use the ping and traceroute utilities Chapter 17 Upgrading the Software explains how to upgrade the system by uploading new software files Chapter 18 Modifying Port Settings describes how to change the Port ID numbers associated with the embedded Web FTP and Telnet servers Chapter 19 Configuring Autodetect describes how to configure the Autodetect service which enables the modem to automatically detect and configure a valid ATM VC at startup 161 15 Managing Access to the Configuration Program This chapter describes how to manage access to the Web Configuration program including creating user logins and passwords and enabling or disabling external access through the WAN port Managing User Logins The Ethernet Modem Router is configured with a default user name and password combination or login for accessing Web Configuration If you want to allow other users to access the program you can create additional user logins and specify their privilege levels You can also change the password for the d
93. cified number of ping or UDP packets 3 by default to the first router in the path toward the specified destination computer These packets carry a time to live TTL value of 1 The TTL value is a counter which is reduced by 1 by each router that receives the packet The first receiving router reduces the TTL from 1 to 0 and responds with an ICMP message indicating that the packet has been discarded The receipt of this message enables the Ethernet Modem Router to determine that the ping UDP packets reached the initial router and the packet s approximate time in transit The traceroute utility then sends out packets with a TTL of 2 The First router that receives the packet reduces the TTL to 1 and routes the packet to the next hop The second router that receives the packet reduces the TTL to 0 and responds with an ICMP timeout reply The next set of traceroute packets has a TTL of 3 and so on until the traceroute packets reach the destination computer The destination computer replies with an error message that signals the completion of the traceroute To perform a traceroute you must know the destination IP address or host name Follow these steps to perform a traceroute 1 From the Diagnostics page click The Diagnostic Traceroute page displays Chapter 16 Monitoring System Status and Performing Diagnostics 175 Figure 81 Diagnostics Page Traceroute 2 Click either the Destination IP Address or Dest Hostname
94. ck in the corresponding Action s column on the Bridge Filter Configuration page The Bridge Filter Rule Stats page reports the accumulated number of packets that have been received that match this rule To view the total number of packets received that match any of the rules click at the bottom of the Bridge Filter Configuration page The Bridge Filter Rule Stats page which shows the number of packets that have been received that match any of the rules On either page you can click to reset the count to zero and to display newly accumulated data Chapter 14 Configuring Filters and Blocking Protocols 157 Blocking Protocols The Blocked Protocols feature enables you to prevent the ADSL2 Ethernet Modem Router from passing any data that uses a particular protocol Unlike the IP filter feature you cannot specify additional criteria for blocked protocols such as particular users or destinations However when you are certain that a particular protocol is not needed or wanted on your network this feature provides a convenient way to discard such data before it is passed To display the Blocked Protocols page click the Services tab and then click Blocked Protocols in the task bar The Blocked Protocols page displays Figure 66 Blocked Protocols Page WARNING Blocking certain protocols may disrupt or disable your network communication or Internet access If you are unfamiliar with how your network or Internet conn
95. ckets were accepted or denied Display the IP Filter Configuration page and then click in the row corresponding to the rule The IP Filter Rule Statistics page displays Figure 61 IP Filter Rule Statistics Page You can click to reset the count to zero and to display newly accumulated data Managing Current IP Filter Sessions When two computers communicate using the IP protocol an IP session is created for the duration of the communication The Ethernet Modem Router allows a fixed number of concurrent IP sessions You can view information about each current IP session and delete sessions for security reasons for example To view all current IP sessions display the IP Filters Configuration page and then click The IP Filter Sessions displays Chapter 14 Configuring Filters and Blocking Protocols 149 Figure 62 IP Filter Sessions Page The IP Filter Session table displays the following fields for each current IP session Field Description Session Index The ID assigned by the system to the IP session all sessions whether or not they are affected by an IP filter rule are assigned a session index Time to expire The number of seconds in which the connection will automatically expire Protocol The underlying IP protocol used on the connection such as TCP UDP IGMP etc I F The interface on which the IP filter rule is effective IP Address The IP addresses involved in the communication Th
96. d the establishing state where the connection is being set up the active state where the connection is being used to transfer data and the closing state in which the connection is being shut down When a NAT rule is in effect on a TCP session in the active state the session will timeout if no packets are received for the time specified in TCP Idle Timeout When in the closing state the session will timeout if no packets are received for the time specified in TCP Close Wait When in the establishing state the session will timeout if no packets are received for the time specified in TCP Def Timeout UDP Timeout sec Same as TCP Idle Timeout but for UDP based communication sessions ICMP Timeout sec Same as TCP Idle Timeout but for ICMP based communication sessions GRE Timeout sec Same as TCP Idle Timeout but for GRE based communication sessions ESP Timeout sec Same as TCP Idle Timeout but for Encapsulating Security Payload based communication sessions Default Nat Age sec For all other NAT translation sessions the number of seconds after which a translation session will no longer be valid if no packets are received NAPT Port Start End When an NAPT rule is defined the source ports will be translated to sequential numbers in this range If you change any values click Then click the Admin tab and commit your changes to permanent system memory see page 46 You can click to view accumulated
97. d provide you with the necessary information to complete this step Logging in to the Ethernet Quick Configuration Page The Ethernet Modem Router provides a preinstalled software program called Web Configuration which enables you to configure the operation of the device via your Web browser The settings that you are most likely to need to change before using the device display on the Quick Configuration page Follow these instructions configure the device settings 1 At any PC connected to the Ethernet Modem Router via Ethernet or USB open your Web browser and type the following URL in the address location box 192 168 1 254 MainPage id 25 When you press lt Return gt the page shown in Figure 8 should display see Appendix B Troubleshooting if you receive an error message or the page does not display Figure 8 Quick Configuration Page in Web Configuration TDM E400 TDM C400 ADSL2 Modem Router User s Manual 34 The fields are described in the following table Work with your ISP to determine which settings you need to change and refer to the indicated chapter for more information about each setting Field Description General Settings ATM Interface Selects the ATM interface you want to use 0 Your system may be configured with more than one ATM interface if you are using different types of services with your ISP Chapter 5 Operation Mode Enables or disables Ethernet Modem Router When set to D
98. d the Internet on the most efficient route based on the data s destination IP address and current network conditions A device that performs routing is called a router SDNS Secondary Domain Name System server A DNS server that can be used if the primary DSN server is not available See DNS SNMP Simple Network Management Protocol A TCP IP protocol used for network management often performed from a remote site SNTP Simple Network Time Protocol An Internet protocol that specifies how a network can synchronize its time with a clock on the Internet subnet A subnet is a portion of a network The subnet is distinguished from the larger network by a subnet mask which selects some of the computers of the network and excludes all others The subnet s computers remain physically connected to the rest of the parent network but they are treated as though they were on a separate network See also network mask subnet mask A mask that defines a subnet See also network mask supplicant In the 802 1x protocol a device that attempts to log on to a network by providing authentication information which is compared to information stored on an authentication server TCP IP Transmission Control Protocol Internet Protocol The basic protocols used on the Internet TCP is responsible for dividing data up into packets for delivery and reassembling them at the destination while IP is responsible for delivering the packets from source to dest
99. damage or deteriorated insulation have it replaced by your service technician Protect Power Cords Route power supply cords so that they are not likely to be walked on or pinched by items placed upon or against them Pay particular attention to cords where they are attached to plugs and convenience receptacles and examine the point where they exit from the product Check Ventilation Slots and openings in the enclosure are provided for ventilation to ensure reliable operation of the product and to protect it from overheating Do not block or cover these openings Never block these openings by placing the product on a bed sofa rug or other similar surface Never place this product near or over a radiator or heat register or any other heat source including amplifiers Do not place this product in a built in installation such as a bookcase or equipment rack unless you provide proper ventilation Do Not Use Accessories Do not use attachments unless they are recommended by your vendor as they may cause electrical or fire hazards Use the Recommended Power Adaptor You must use the Power Adaptor that comes with your ADSL2 Ethernet Modem Router Do Not Use Near Water Do not use this product near water For example near a swimming pool bath tub wash bowl and the like Do Not place Near High Temperature Source For example near a steamer kitchen range fire and the like Use Caution in Mounting This Product Do
100. data traffic traveling in the incoming direction from the WAN interface to the LAN interface will not count as activity on the WAN interface for the purposes of determining whether to make it inactive i e incoming traffic will not activate a start on data interface Only LAN to WAN traffic will start the interface The PPP Configuration Table displays the following fields Field Description Interface The name of the PPP interface VC The virtual circuit over which this PPP data is sent The VC identifies the physical path the data takes to reach your ISP Interface Sec Type The type of firewall protections that are in effect on the interface public private or DMZ o A public interface connects to the Internet PPP interfaces are typically public Packets received on a public interface are subject to the most restrictive set of firewall protections defined in the software o A private interface connects to your LAN such as the Ethernet interface Packets received on a private interface are subject to a less restrictive set of protections because they originate within the network o The term DMZ de militarized zone in Internet networking terms refers to computers that are available for both public and in network accesses such as a company s public Web server Packets incoming on a DMZ interface whether from a LAN or external source are subject to a set of protections that is in between public and private i
101. dem Router that communicate with other network and Internet devices are identified by unique Internet protocol IP addresses You can use the Web Configuration to view the list of IP addresses that your device uses and to view other system and network performance data See Appendix A for a description of IP addresses and masks Viewing the Ethernet Modem Router s IP Addresses To view the Ethernet Modem Router s IP addresses click the Routing tab and then click IP Addr in the task bar The IP Address Table page displays Figure 32 IP Address Table Page The table lists the IP addresses network masks Net Mask and interface names IF Name for each of its IP enabled interfaces The listed IP addresses may include The IP address of the device s LAN Ethernet port called eth 0 See Chapter 4 for instructions on configuring this address The IP address of the device s USB interface named usb 0 See Chapter 4 for instructions on configuring this address The IP address of the WAN ADSL line interface which your ISP and other external devices use to identify your network It may be identified in the Web Configuration by the names ppp 0 eoa 0 or ipoa 0 depending on the protocol your device uses to communicate with your ISP Your ISP may assign the same address each time or it may change each time you reconnect The loopback IP address named lo 0 of 127 0 0 1 This special address enables the devi
102. dress of a computer on your LAN To the external computer it appears as if the access is being made to the public IP address when in fact it is communicating with a LAN computer In the outgoing direction the private source IP address in a data packet is translated to the LAN s public IP address To the rest of the Internet it appears as if the data packet originated from the public IP address Bimap rules can be used to provide external access to a LAN device They do not provide the same level of security as RDR rules because RDR rules also reroute incoming packets based on the port ID Bimap rules do not account for the port number and therefore allow external access regardless of the destination port type specified in the incoming packet Figure 55 shows the fields used to establish a Bimap rule Figure 55 NAT Rule Add Page Bimap Flavor Follow these instructions to add a Bimap rule see steps 1 4 under The NAPT rule on page 125 for specific instructions corresponding to steps 1 and 2 below 1 Display the NAT Rule Add Page select BIMAP as the Rule Flavor and enter a Rule ID 2 Select the interface on which this rule will be effective 3 In the Local Address field type the private IP address of the computer to which you are granting external access 4 In the Global Address field type the address that you want to serve as the publicly known address for the LAN computer 5 Follow steps 8 11 under
103. e Add 153 Commit amp Reboot 46 DHCP Address Table 99 DHCP Configuration 96 101 DHCP Relay Configuration 100 DHCP Server Pool Add 96 DHCP Server Pool Modify 99 Diagnostics 172 Diagnostics Ping 173 Diagnostics Traceroute 175 DNS Configuration 105 DSL Interval Statistics 171 DSL Modem Setup Wizard Welcome 28 DSL Parameters 170 DSL Statistics 170 DSL Status 169 EOA 67 EOA Interface Add 69 Firewall Blacklisted Hosts 138 Index 201 Firewall Configuration 135 Home System View 41 Image Upgrade 161 IP Address Table 91 IP Filter Configuration 140 IP Filter Rule Add 142 IP Filter Rule Statistics 148 IP Filter Sessions 149 IP Global Statistics 92 IP Route Add 110 IP Route Table 108 IPoA 72 IPoA Interface 74 IPoA Interface Global Map 75 IPoA Interface Map 75 LAN Configuration 53 Local Image Upgrade 177 Management Control 164 NAT Configuration 119 NAT Rule Add BASIC 130 NAT Rule Add Bimap 133 NAT Rule Add Filter 131 NAT Rule Add NAPT 125 NAT Rule Add Pass 134 NAT Rule Add RDR 127 NAT Rule Configuration 122 NAT Rule Global Statistics 121 NAT Rule Statistics 122 NAT Translations 123 NAT Translations Details 124 Port Settings 182 PPP Detail 64 PPP Configuration 61 PPP Interface Add 66 Quick Configuration 33 Remote Image Upgrade 178 RI
104. e first one shown is the initiator of the communication Port The hardware addresses of the ports involved in the communication In Out Rule Index The number of the IP filter rule that applies to this session assigned when the rule was created In Out Action The action accept deny or unknown being taken on data coming into or going out from the interface This action is specified in the rule definition Actions Provides an icon you can click on to delete the IP session When you delete a session the communication is discontinued You can click to display newly accumulated data TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 150 Configuring Bridge Filters Bridge filter rules can be created to control the forwarding of incoming and outgoing data between your LAN and the Internet and within your LAN Bridge filter rules make decisions based on the structure of the layer 2 data packets e g Ethernet packets sent or received on the device interfaces unlike IP filter rules which are based on the structure of layer 3 e g IP packets Bridge filtering is also referred to as raw filtering When the bridge filtering feature is enabled the bridge router examines each incoming layer 2 packet and compares it to the bridge filter rules The bridge filter rules specify which bits of the packet are to be examined and what criteria those bits must meet in order to qualify as a match for the rule
105. e DHCP pool see Configuring DHCP Server on page 95 and specified in the DNS configuration see Chapter 9 Oper Status Indicates whether the link is currently up or down or if a specific type of data exchange is under way e g password authorization or DHCP Actions You can use these icons to modify delete and view additional details on the PPP interface Not all settings are available on the PPP Interface Modify page To modify the other settings you must delete the interface and create a new one Be sure to submit and commit your changes if you make modifications TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 64 Viewing PPP Interface Details When you click to view additional details the PPP Interface Detail page displays Figure 19 PPP Detail Page In addition to the properties defined on page 62 the Detail page displays these fields Field Description Status Indicates which of the following interface statuses has been manually selected o Start The connection will be established for use whenever the device is turned on or rebooted o Stop The PPP interface has been manually disabled and cannot currently be used It can only be used after being manually returned to the Start state o Start On Data The PPP connection will be established automatically whenever data is sent to the interface e g when a LAN user attempts to use the Internet and will
106. e IP address of the secondary DNS server located with your ISP used on this PPP connection Security Protocol The type of PPP security your ISP uses PAP Password Authentication Protocol or CHAP Challenge Handshake Authentication Protocol Login Name The name you use to log in to your ISP each time this PPP connection is established TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 66 Adding a PPP Interface Follow this procedure to add a PPP interface Note If you need to use more than one PPP connection you may be able to create multiple PPP interfaces The number and type of PPP interfaces you can create depends on the lower level ATM VC interface type LLC Mux or VC Mux the Max Protocol setting for the ATM VC interface the PPP interface type you want to create PPPoA or PPPoE and whether other WAN interface types have already been configured EoA or IPoA Contact your ISP for assistance 1 From the PPP Configuration Page click The PPP Interface Add page displays Figure 20 PPP Interface Add Page 2 Select a PPP interface name from the drop down list and then enter or select data for each field The fields are defined in the tables on page 62 and 64 3 Click A page displays to confirm your changes 4 Click to return to the PPP page and view the new interface in the table 5 If you want the changes to be permanent follow the instructions on page 46 to com
107. e Internet USB Universal Serial Bus A serial interface that lets you connect devices such as printers scanners etc to your computer by simply plugging them in The Ethernet USB combo router is equipped with a USB interface for connecting to a stand alone PC VC Virtual Circuit A connection from your ADSL2 Ethernet Modem Router to your ISP VCI Virtual Circuit Identifier Together with the Virtual Path Identifier VPI the VCI uniquely identifies a VC Your ISP will tell you the VCI for each VC they provide See also VC VPI Virtual Path Identifier Together with the Virtual Circuit Identifier VCI the VPI uniquely identifies a VC Your ISP will tell you the VPI for each VC they provide See also VC WAN Wide Area Network Any network spread over a large geographical area such as a country or continent With respect to the WAN refers to the Internet 197 Index 100BASE T 190 10BASE T 190 ADSL 190 ADSL cable 20 ADSL port 20 Alarm page 167 Alarms 167 Asynchronous Transfer Mode See ATM ATM 190 ATM VC Add page 59 60 ATM VC Configuration page 58 Attacks 136 Autodetect configuring 184 overview 183 Autodetect page 184 Backup Restore Config page 179 BASIC NAT flavor 130 BIMAP NAT flavor 133 Binary numbers 191 Bits 191 Black List 136 managing 138 Blocked Protocols page 157 Bridge Configuration page 70 79 Bridge filter example 15
108. e currently defined on the device The table may be empty TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 68 The following table describes the fields on this page Field Description Interface The name the software uses to identify the EoA interface Interface Sec Type The type of security protections in effect on the interface public private or DMZ o A public interface connects to the Internet IPoA interfaces are typically public Packets received on a public interface are subject to the most restrictive set of firewall protections defined in the software o A private interface connects to your LAN such as the Ethernet interface Packets received on a private interface are subject to a less restrictive set of protections because they originate within the network o The term DMZ de militarized zone in Internet networking terms refers to computers that are available for both public and in network accesses such as a company s public Web server Packets incoming on a DMZ interface whether from a LAN or external source are subject to a level of protection that is in between those for public and private interfaces Lower interface EoA interfaces are defined in software and then associated with lower level software and hardware structures at the lowest level they are associated with a physical port the WAN port This field should reflect an interface name defined in the next lower level
109. e file from there or copy it to your hard drive or to any shared network drive The name of the upgrade file must be either TEImage bin or TEPatch bin where represents any number of characters 2 Log into Web Configuration click the Admin tab and then click Local Image Upgrade in the task bar The Local Image Upgrade page displays Figure 82 Local Image Upgrade Page 3 In the Upgrade File text box type the path and file name of the file You can click to search for it TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 178 4 Select the file and then click The following message box displays at the bottom of the page Loading New Software Please do not interrupt the upgrade process A status page will appear automatically when loading is completed about 1 minute When loading is complete the following message displays the file name may differ File TEImage bin successfully saved to flash Please reboot for the new image to take effect 5 Turn off power to the unit wait a few seconds and turn it on again The new software will now be in effect If the system fails to boot or is not working properly contact your ISP for assistance Uploading an Image Stored Remotely Follow this procedure if the upgrade file is available by downloading from your ISP Contact your ISP to obtain the server and logon information required 1 Log into Web Configuration click the Admin tab and
110. e firewall settings will be tracked Records of such events can be sent via Ethernet to be handled by a system utility Trace or can e mailed to specified administrators E mail ID of Admin 1 2 3 Specifies the e mail addresses of the administrators who should receive notices of any attempted firewall violations Type the addresses in standard internet e mail address format e g jxsmith onecompany com The e mail message will contain the time of the violation the source address of the computer responsible for the violation the destination IP address the protocol being used the source and destination ports and the number violations occurring the previous 30 minutes If the ICMP protocol is being used then instead of the source and destination ports the e mail will report the ICMP code and type 3 Click 4 If you want the changes to be permanent follow the instructions on page 46 to commit them TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 138 Managing the Blacklist If data packets are received that violate the firewall settings or any of the IP filter rules then the source IP address of the offending packets can be blocked from such accesses for a specified period of time You can enable or disable use of the black list using the settings described above The source computer remains on the black list for the period of time that you specify To view the list of currently blacklisted computers c
111. e following chapters Chapter 4 Configuring the LAN and USB Interfaces explains how to configure the Ethernet and USB interfaces which connect though distinct ports to your LAN hub switch and optional USB enabled PC Because the Ethernet interface can be used to connect to multiple computers it is referred to as the LAN interface Chapter 5 Configuring WAN Interfaces explains how to configure the ATM Virtual Circuit VC interface and higher level interfaces that the device uses to communicate via the DSL port Chapter 6 Configuring the System Operating Mode describes the device s operating modes and explains how the LAN and WAN interfaces must be configured to enable each mode 51 4 Configuring the LAN and USB Interfaces This chapter describes how to configure the interfaces on the Ethernet Modem Router that communicate with your LAN and USB computers Connecting Your PCs via Ethernet and or USB If you are using the ADSL2 Ethernet Modem Router with multiple PCs on your LAN you must connect the LAN via an Ethernet hub or switch to the device s LAN port also called the Ethernet port If you are using a single PC with the ADSL2 Ethernet Modem Router you have two connection options You can connect the PC directly to the LAN port using a crossover Ethernet cable See Appendix B Troubleshooting for a description of crossover versus straight through Ethernet cables If the PC is USB enabled yo
112. e instructions in Setting the DHCP Mode to set the DHCP mode to DHCP Relay Setting the DHCP Mode You must enable the appropriate DHCP mode to activate your DHCP relay or DHCP server settings Follow these instructions to set the DHCP mode 1 Click the LAN tab and then click DHCP Mode in the task bar The DHCP Configuration page displays Figure 39 DHCP Configuration Page 2 From the DHCP Mode drop down list choose DHCP Server DHCP Relay or None If you choose none your LAN computers must be configured with static IP addresses 3 Click 4 If you want the changes to be permanent follow the instructions on page 46 to commit them 103 9 Configuring DNS Server Addresses About DNS Domain Name System DNS servers map the user friendly domain names that users type into their Web browsers e g yahoo com to the equivalent numerical IP addresses that are used for Internet routing When a PC user types a domain name into a browser the PC must first send a request to a DNS server to obtain the equivalent IP address The DNS server will attempt to look up the domain name in its own database and will communicate with higher level DNS servers when the name cannot be found locally When the address is found it is sent back to the requesting PC and is referenced in IP packets for the remainder of the communication Assigning DNS Addresses to PCs Multiple DNS addresses are useful to provide alternat
113. e new settings Next configure the PCs to accept IP information assigned by the Ethernet Modem Router 9 In the Control Panel double click the Network and Dial up Connections icon 10 In Network and Dial up Connections window right click the Network icon and then select Properties 11 In the Network Properties dialog box select TCP IP and then click 12 In the TCP IP Settings dialog box click the radio button labeled Server assigned IP address Also click the radio button labeled Server assigned name server address 13 Click twice to confirm and save your changes and then close the Control Panel Chapter 2 Quick Start 25 Windows 95 98 PCs First check for the IP protocol and if necessary install it 1 In the Windows task bar click the Start button point to Settings and then click Control Panel 2 Double click the Network icon The Network dialog box displays with a list of currently installed network components If the list includes TCP IP and then the protocol has already been enabled Skip to step 9 3 If TCP IP does not display as an installed component click The Select Network Component Type dialog box displays 4 Select Protocol and then click The Select Network Protocol dialog box displays 5 Click on Microsoft in the Manufacturers list box and then click TCP IP in the Network Protocols list box 6 Click to return to the Network dialog box and then click
114. e system operating mode defined on the modem When Autodetect is configured in bridging mode it can detect the presence of PPPoE and EoA interfaces on the access server In this mode the modem must be configured as a bridge and a PPPoE or DHCP client is expected to be running on the LAN PC behind the modem When configured in routing mode Autodetect can detect PPPoE EoA PPPoA or IPoA 1577 interfaces on the access server Autodetect searches for these interfaces in the order stated Depending on the interface detected Autodetect creates a PPP an EoA or an IPoA interface on the modem In this mode the modem is expected to be configured as a router TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 184 Configuring Autodetect Follow these steps to configure Autodetect 1 Log into Web Configuration click the Admin tab and then click Autodetect to display the Autodetect page Figure 86 Autodetect Page 2 Select the appropriate Autodetect mode of operation as described in the previous section from the Autodetect Mode drop down list 3 Click the Enable radio button 4 Click A page will display briefly to confirm your changes Autodetect will not start searching for a valid connection until the modem is rebooted 5 Click A warning message will display to inform you that the current configuration will be lost 6 Click The modem will reboot and the Web interface will be temporar
115. e your changes to permanent memory 4 On the Commit amp Reboot page click Note that the new settings will not be effective until you reboot the system 183 19 Configuring Autodetect Autodetect enables the modem to automatically detect and configure a valid ATM VC at startup Autodetect eliminates the need to have users configure VC values as described in Configuring the ATM VC on page 58 How Autodetect Works When enabled Autodetect attempts to establish a DSL connection with the ISP using VC values VPI VCI selected in either of two ways from a pre determined list preconfigured on the modem from the complete range of valid values Note The method of operation is preconfigured by the ISP and cannot be changed using the Web based interface A valid connection is found when a PPP EoA or IPoA interface is found on the ISP s access server If the initial VPI VCI values do not detect a valid connection then Autodetect tries again using the next set of available values When a successful connection is discovered that connection is used for the current session and the VPI VCI values are remembered for initial use the next time the modem starts up Autodetect Modes Autodetect can be used to establish PPPoE PPPoA IPoA 1577 and EoA connections and can be configured in either of two modes bridging mode and routing mode These modes are specific to the Autodetect feature and are configured in addition to th
116. ead The Ethernet Modem Router can perform both routing and bridging Typically when both functions are enabled the device routes IP data and bridges all other types of data See also routing broadband A telecommunications technology that can send different types of data over the same medium DSL is a broadband technology broadcast To send data to all computers on a network DHCP Dynamic Host Configuration Protocol DHCP automates address assignment and management When a computer connects to the LAN DHCP assigns it an IP address from a shared pool of IP addresses after a specified time limit DHCP returns the address to the pool DHCP relay Dynamic Host Configuration Protocol relay A DHCP relay is a computer that forwards DHCP data between computers that request IP addresses and the DHCP server that assigns the addresses Each of the Ethernet Modem Router s interfaces can be configured as a DHCP relay See DHCP DHCP server Dynamic Host Configuration Protocol server A DHCP server is a computer that is responsible for assigning IP addresses to the computers on a LAN See DHCP DNS Domain Name System The DNS maps domain names into IP addresses DNS information is distributed hierarchically throughout the Internet among computers called DNS servers When you start to access a web site a DNS server looks up the requested domain name to find its corresponding IP address If the DNS server cannot find the IP address it communicate
117. ection uses these protocols contact your ISP before disabling The following list describes each of the available protocols Protocol Description PPoE Point to Point Protocol over Ethernet Many DSL modems use PPoE to establish and maintain a connection with a service provider PPoE provides a means of logging in to the ISPs servers so that they can authenticate you as a customer and provide you access to the Internet Check with your ISP before blocking this protocol TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 158 Protocol Description IP Multicast IP Multicast is an extension to the IP protocol It enables individual packets to be sent to multiple hosts on the Internet and is often used for handling e mail mailing lists and teleconferencing videoconferencing RARP Reverse Address Resolution Protocol This IP protocol provides a way for computers to determine their own IP addresses when they only know their hardware address i e MAC addresses Certain types of computers such as diskless workstations must use RARP to determine their IP address before communicating with other network devices AppleTalk A networking protocol used in for Apple Macintosh networks NetBEUI NetBIOS Enhanced User Interface On many LAN operating systems the NetBEUI protocol provides the method by which computers identify themselves to and communicate with each other IPX Internetwork Packet Exchange A net
118. ed When creating rules and their subrules you may have chosen to leave them disabled the default To make a rule active enable the following three settings The Bridge Filter service At the top of the Bridge Filter Configuration page click the Enable radio button The rule On the Bridge Filter Configuration page click in the Actions column in the row for the rule On the Bridge Chapter 14 Configuring Filters and Blocking Protocols 155 Filter Rule Modify page select the Enable radio button and click At least one subrule On the Bridge Filter Configuration page you can enable a subrule by editing it Click in the Actions column in the row for the subrule On the Bridge Filter Subrule Modify page select the Enable radio button and click If a rule is enabled but none of its subrules are enabled then the rule will have no effect on network traffic A rule can be in effect however when some of its subrules are disabled If want your changes to be permanent be sure to commit them see Committing Changes on page 46 Bridge Filter Rule Example The following instructions create a rule for preventing Telnet access to the device from a specific WAN interface 1 Add rule 100 with the following settings Interface ppp 0 Direction Incoming Action Accept 2 Click the Enable radio button at the top of the Bridge Filter Rule Add page and then click 3 Add subrule 1 with the following
119. ed DHCP server address pools Guidelines for creating DHCP server address pools An IP address pool typically includes a range private addresses that you define LAN administrators often define private IP addresses for use only on their networks See Overview of NAT on page 117 for an explanation of private IP addresses You can also use DHCP server pools to distribute multiple public IP addresses if for example these are to be shared among a larger set of LAN computers You can create up to two DHCP server address pools You can define a single pool with addresses that can be assigned to your LAN PCs connected via the Ethernet port and to a USB connected computer as long you have assigned to the USB and Ethernet interfaces static IP addresses that place them in the same subnet See Appendix A for an explanation of subnets For example assume you assigned the following addresses to the Ethernet and USB interfaces Ethernet interface eth 0 IP address 192 168 1 254 mask 255 255 255 0 USB interface usb 0 IP address 192 168 1 2 mask 255 255 255 0 Then you could create a single pool for assignment to all your PCs Pool 0 192 168 1 3 through 192 168 1 20 mask 255 255 255 0 You can create a second pool which must be in a different subnet than the first if either of these circumstances apply You assigned static IP addresses to the device s Ethernet and USB interfaces that place them in different subnets
120. ed in your default configuration The NAPT flavor translates private source IP addresses to a single public IP address The NAPT rule also translates the source port numbers to port numbers that are defined on the NAT Global Configuration page see page 119 The introduction to NAT on page 117 describes how the NAPT rule works 1 Click the NAT tab and then select NAT Rule Entry from the NAT Options drop down list The NAT Rule entry page displays as shown on page 122 2 Click to display the NAT Rule Add page 3 From the Rule Flavor drop down list select NAPT The page redisplays with only those fields that are appropriate for the NAPT rule flavor Figure 51 NAT Rule Add Page NAPT Flavor TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 126 4 Enter a Rule ID The Rule ID determines the order in which rules are invoked the lowest numbered rule is invoked first and so on If you define two or more rules that act on the same set of IP addresses be sure to assign the Rule ID so that the higher priority rules are invoked first It is recommended that you specify rule IDs as multiples of 5 or 10 so that in the future you can insert a rule between two existing rules When a data packet matches a rule the data is acted upon according to that rule and is not subjected to higher numbered rules 5 From the IFName drop down list select the interface on the device to which this rule applies
121. efault login or for any logins you create The default login allows the user full access to all Web Configuration features including creating up to four additional user logins You can assign one of the following privilege levels to each additional login Root level privileges enable users to modify all the features available in Web Configuration The default login has root level privileges Intermediate level privileges enable users to change their own passwords They can also change the PPP interface username and password and the ATM VC interface values Note however that Intermediate users can change these only on the PPP and ATM VC pages not on the Quick Configuration page These users can view but not create or modify all other system information User level privileges enable users to change their own passwords They can view but not create or modify all other system information To create additional logins or modify existing logins follow these instructions 1 Log into Web Configuration using the default user name and password and then click the Admin tab The User Configuration page displays by default Figure 67 User Configuration Page TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 162 2 Click to display the User Config Add page Figure 68 User Config Add Page 3 Type the User ID and Password in the text boxes provided and then select the privilege level for this user
122. equirements no additional configuration may be needed before you begin using the device Part 2 Interfaces and Operating Modes describes the available operating modes and how to configure them Part 2 also provides detailed configuration instructions for each of the Ethernet Modem Router s interfaces These instructions will be particular use when your network or Internet connection requirements differ from those reflected in the default product settings Part 3 Routing and IP Related Features provides configuration instructions and detailed information on using the Ethernet Modem Router s routing features such as DHCP server DNS relay and IP routes Part 4 Security Features describes how to configure Network Address Translation NAT and the embedded firewall and how to create your own data filters Part 5 Administrative Tasks and System Monitoring provides instructions for network and system administrators on controlling access to the Ethernet Modem Router s configuration software viewing system performance statistics diagnosing problems upgrading the system software managing the configuration and configuring special features The document s appendices explain basic Internet and networking concepts and provide solutions to common troubleshooting issues A glossary and an index are provided for your reference TDM E400 TDM C400 ADSL Modem Router User s Manual 14 Using this Document Notati
123. erface will use when it sends its route information to other devices The Receive Mode setting indicates the RIP version s in which information must be passed to the Ethernet Modem Router in order for it to be accepted into its routing table RIP version 1 is the original RIP protocol Select RIP1 if you have devices that communicate with this interface that understand RIP version 1 only RIP version 2 is the preferred selection because it supports classless IP addresses which are used to create subnets and other features Select RIP2 if all other routing devices on the autonomous network support this version of the protocol 6 Click The new RIP entry will display in the table 7 Click the Enable radio button to enable the RIP feature Note If you disable the RIP feature the interface settings you have configured will remain available for future activation 8 Click A page displays to confirm your changes 9 If you want the changes to be permanent follow the instructions on page 46 to commit them Note You can delete an existing RIP entry by clicking in the Action column TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 114 Viewing RIP Statistics From the RIP Configuration page you can click to view statistics on attempts to send and receive route table data over RIP enabled interfaces on the Ethernet Modem Router Figure 44 RIP Global Statistics Page You can c
124. erface s operate on top of the ATM VC interface The higher level interface handles the protocols needed to log onto and exchange data with the ISP s access server ISPs can use several different protocols including the Point to Point Protocol PPP Ethernet over ATM EoA protocol or the Internet Protocol over ATM IPoA Be sure to create the specific type of WAN interface your ISP requires The following section describes configuring the AMT interface properties After you have defined these properties you can configure one of the higher level WAN interfaces to enable communication with your ISP as described in the subsequent sections TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 58 Configuring the ATM VC The device is pre configured with an ATM VC interface called aal5 0 You may need to change the default VC values associated with the interface to values assigned by your ISP To view the current values log into Web Configuration click the WAN tab and then click ATM VC in the task bar The ATM VC Configuration page displays Figure 15 ATM VC Configuration Page Note The Quick Start instructions in Chapter 2 also include ATM interface configuration via Web Configuration s Quick Configuration page You can use either page to configure the required values The ATM VC Configuration table displays the following fields Field Description Interface The name of the ATM interface to w
125. esses already in use on your network whether assigned statically to your PCs or assigned dynamically using DHCP Chapter 12 Configuring Network Address Translation 131 5 In the Global Address From and Global Address To fields type the starting and ending addresses that identify the pool of public IP addresses that the private addresses should be translated to Or type the same address in both fields if you also specified a single address in step 4 6 Follow steps 8 11 under The NAPT rule on page 125 to submit your changes The Filter rule Configuring a Basic rule with additional criteria Like the Basic flavor the Filter flavor translates public and private IP addresses on a one to one basis The Filter flavor extends the capability of the Basic rule Refer to The Basic Rule on page 130 for a general description You can use the Filter rule if you want an address translation to occur only when your LAN computers initiate access to specific destinations The destinations can be identified by their IP addresses port type which identifies it as a FTP or Web server for example or both Figure 54 shows the fields used to establish a Filter rule Figure 54 NAT Rule Add Page Filter Flavor Follow these instructions to add a Filter rule see steps 1 4 under The NAPT rule on page 125 for specific instructions corresponding to steps 1 and 2 below 1 Display the NAT Rule Add Page select FILTER as the
126. figuration Storing and Restoring Configuration Settings Many of the Ethernet Modem Router s software features such as those documented in this User s Manual can be configured in various ways to address your needs or your ISP s requirements This configuration data becomes part of the software image You can extract configuration data from the software image and save it on your PC as a text file If you later change the system configuration but then want to revert to the previous settings you can load the configuration file back to the system This feature may be especially useful when you receive an image upgrade file from your ISP containing software updates Uploading the new image may overwrite your customized settings with default values Before you load the new image you can store the configuration settings Then after you load the image you can restore your previous configuration Follow these instructions to save and restore the configuration file 1 Ensure that any changes you have made in the current session have been committed click the Admin tab click Commit amp Reboot in the task bar and then click 2 In the Admin tab click Backup Restore Config in the task bar The Backup Restore Config page displays Figure 84 Backup Restore Config Page 3 Perform either of the following TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 180 To save the current configuration click
127. g whereby traffic is distributed among several redundant servers to help ensure efficient network performance These addresses should correspond to private addresses already in use on your network either assigned statically to your PCs or assigned dynamically using DHCP as discussed in Quick Start Part 2 Configuring Your Computers 5 In the Global Address From and Global Address To fields type the public IP address assigned to you by your ISP If you have multiple WAN PPP interfaces note that this rule will not be enforced for data that arrives on WAN interfaces not specified here If you have multiple WAN interfaces and want the rule to be enforced on more than one of them or all enter a range of IP addresses that includes them 6 From the Destination Port From and Destination Port To drop down lists select the port type of the computer you are making publicly available or leave them set to Any other port If you want to specify a port type that is not available in the drop down lists you can instead type the port ID number in text boxes to the right You can specify a range using the From To fields if you want the rule to apply to a range of port types or enter the same port number in both fields If you leave the selection set to Any other port then incoming data will not be checked for the destination port type Chapter 12 Configuring Network Address Translation 129 A port ID identifies the specifi
128. g the device you can follow the instructions on page 37 to verify that it is working properly This Quick Start assumes that you have already established ADSL service with your Internet service provider ISP These instructions provide a basic configuration that should be compatible with your home or small office network setup If necessary refer to the subsequent chapters for additional configuration instructions Quick Start Part 1 Connecting the Hardware In Quick Start Part 1 you connect the device to the phone jack the power outlet and your computer or network WARNING Before you begin turn the power off for all devices These include your computer s your LAN hub switch if applicable and the Ethernet Modem Router Figure 1 illustrates the hardware connections The layout of the ports on your device may vary from the layout shown Refer to the steps that follow for specific instructions TDM E400 TDM C400 ADSL2 Modem Router User s Manual 20 Figure 1 Overview of Hardware Connections Step 1 Connect the ADSL cable and optional telephone Connect one end of the provided phone cable to the port labeled DSL on the rear panel of the device Connect the other end to your wall phone jack Step 2 Connect the Ethernet cable If you are connecting a LAN to the Ethernet Modem Router attach one end of the provided Ethernet cable to a regular hub port and the other end to the Ethernet port on the Ethernet
129. ge specified in the NAT rules see Chapter 4 Or configure the PC to accept an address assigned by another device see Quick Start Part 2 Configuring Your Computers The default configuration includes a NAT rule for all dynamically assigned addresses within a predefined pool see the instructions in Chapter 8 to view the address pool My LAN PCs cannot display web pages on the Internet Verify that the DNS server IP address specified on the PCs is correct for your ISP as discussed in the item above If you specified that the DNS server be assigned dynamically from a server then verify with your ISP that the address configured on the Ethernet Modem Router is correct then You can use the ping utility described on page 173 to test connectivity with your ISP s DNS server Web Configuration Program I forgot lost my Web Configuration user ID or password If you have not changed the password from the default try using admin as both the user ID and password Otherwise you can reset the device to the default configuration by pressing the Reset button on the back panel of the device three times using a pointed object such as a pen tip Then type the default User ID and password shown above WARNING Resetting the device removes any custom settings and returns all settings to their default values I cannot access the Web Configuration program from my web browser Use the ping utility discussed in the fol
130. he PPP protocol at all instead offering EoA type connections described on page 67 Contact your ISP before changing the preconfigured WAN interface type Viewing Your Current PPP Configuration To view your current PPP setup log into Web Configuration click the WAN tab and then click PPP in the task bar The Point to Point Protocol PPP Configuration page displays Figure 18 Point to Point Protocol PPP Configuration Page A PPP interface is configured as a group of software settings associated with an ATM VC interface Each PPP interface is given a name such as ppp 0 ppp 1 Users typically need only one PPP interface in some cases multiple interfaces are created to allow the user to log on to more than one account with the ISP TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 62 You can configure the following settings on the PPP Configuration page Inactivity TimeOut The time in minutes that must elapse before a PPP connection times out due to inactivity This setting applies only to PPP interfaces that are configured as start on data interfaces This type of interface starts up only when it receives data and then returns to a down state after the specified amount of time see the status field on page 64 This setting works with the following setting to determine what type of data can activate a start on data interface Ignore WAN to LAN traffic while monitoring inactivity When enabled
131. hich these VC properties apply The ATM interface names identify the type of traffic that can be supported such as data or voice Internet data services typically use an AAL5 type interface Vpi Vci and Mux Type These settings identify a unique ATM data path for communication between your ADSL ADSL2 Ethernet Modem Router and your ISP Max Proto per AAL5 If you are using an AAL5 type of interface this setting indicates the number of higher level interfaces that the VC can support the higher level interfaces can be PPP EoA or IPoA interfaces Contact your ISP to determine which type they require Actions Displays icons you can click on to modify and delete the associated interface You cannot delete an ATM interface if another protocol such as PPP EoA or IPoA has been defined to operate over the ATM interface You must first delete the higher level interface Chapter 5 Configuring the WAN Interfaces 59 Modifying ATM VCs Your device may contain placeholder values that you must change to establish an ATM connection Contact your ISP to determine your ATM VC values Follow these instructions to modify a pre configured VC 1 From the ATM VC Configuration page click in the Actions column for the interface you want to modify The ATM VC Interface Modify page displays Figure 16 ATM VC Interface Modify Page 2 Enter the new VPI and VCI values select the MUX type or change the maximum num
132. iew additional details about a NAT translation session TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 124 Figure 50 NAT Translation Details Page In addition to the information displayed in the NAT Translations table this table displays the following for the selected current translation sessions Field Description Translated InAddress The public IP address to which the private IP address was translated In Address The private IP address that was translated Out Address The IP address of the outside destination web ftp site etc In Out Packets The number of incoming and outgoing IP packets that have been translated in this translation session In Ports The actual port number corresponding to the LAN computer Out Ports The port number associated with the destination address Translated In Ports The port number to which the LAN computer s actual port number was translated Chapter 12 Configuring Network Address Translation 125 Adding NAT Rules This section explains how to create rules for each NAT flavor Note You cannot edit existing NAT rules To change a rule setup delete it and add a new rule with the new settings The NAPT rule Translating between private and public IP addresses Follow these instructions to create a rule for translating the private IP addresses on your LAN to your public IP address This type of rule uses the NAT flavor NAPT which was us
133. iewing device s 91 IP configuration static 27 static IP addresses 27 Windows 2000 23 Windows 95 98 25 Windows Me 24 Windows NT 4 0 26 IP Configuration Windows XP 22 IP data packet 117 IP Filter Configuration page 140 IP Filter Rule Statistics page 148 IP Filter Rule Add page 142 IP filter rules adding 142 examples 147 settings 143 IP filter sessions 148 IP Filter Sessions page 149 IP filters viewing statistics 148 IP Global Statistics page 92 IP information configuring on LAN computers 22 IP Route Add page 110 IP Route Table page 108 IP routes adding 110 manually configuring 108 type 109 IP Routes defined 106 IPoA Interface Add page 74 IPoA Interface Global Map page 75 IPoA Interface Map page 75 IPoA page 72 ISP 193 LAN 193 LAN Configuration page 53 LAN interface configuring multiple 92 LAN IP address 51 53 specifying 52 viewing 91 LAN port default IP information 27 LEDs 193 troubleshooting 188 Local Image Upgrade page 177 Login to Configuration Manager 38 Loopback IP address 91 MAC addresses 77 193 in DHCP Address Table 99 in DHCP pools 97 Management Control page 164 Mask See Network mask Mbps 193 Microfilter 193 Modes Bridging 82 Routing 81 Routing and Bridging 83 ZIPB 86 Modes operating 78 NAPT NAT flavor
134. ify a destination address or range if you want this rule to apply only to outbound traffic to the address or range If you enter only the network ID portion of the destination address then the rule will apply to outbound traffic from all computers on network 7 From the Destination Port From To drop down lists select a port type if you want the rule to apply only to outbound traffic to servers of this type Otherwise leave them set to Any other port If you want to specify a port type that is not available in the drop down lists you can instead type the port ID number in the text boxes to the right You can specify a range using the From To fields if you want the rule to apply to a range of port types or enter the same port number in both fields If you leave the selection set to Any other port then outbound data will not be checked for the destination port type See step 6 for creating an RDR rule on page 128 for an explanation of port IDs 8 Follow steps 8 11 under The NAPT rule on page 125 to submit your changes Chapter 12 Configuring Network Address Translation 133 The Bimap rule Performing two way translations Unlike the other NAT flavors the Bimap flavor performs address translations in both the outgoing and incoming directions In the incoming direction when the specified interface receives a packet with your public IP address as the destination address this address is translated to the private IP ad
135. ifying the interfaces that support bridging The table may be empty if bridging has not yet been configured TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 80 2 In the interface table select all interface names on which you want to perform bridging and click To enable bridging with your ISP select the LAN interface eth 0 and or usb 0 and the EoA interface you created for the bridging path After creating bridgeable interfaces you must enable the bridging feature as described in the following section Enabling Bridging Mode To make an interface non bridgeable display the Bridge Configuration page and click next to the interface you want to delete Click to confirm the deletion The interface remains defined in the system but is no longer capable of performing bridging Enabling Bridging Mode After you have created bridgeable interfaces you must enable the bridging service on the system as a whole 1 Click the Home tab and then click System Mode in the task bar The System Mode page displays Figure 31 System Mode Page You can also access the System Mode page from Bridging page Click any of the links that display in red near the top of the page 2 Click the Bridging Enabled radio button if not already selected and then click A page will briefly display to confirm your changes and will return you to the System Mode page 3 If you want the changes to be perma
136. ign temporary IP addresses to your computers whenever they connect to your network The assigning device is called a DHCP server and the receiving device is a DHCP client Note If you followed the Quick Start instructions you either configured each LAN PC with an IP address or you specified that it will receive IP information dynamically automatically If you chose to have the information assigned dynamically then you configured your PCs as DHCP clients that will accept IP addresses assigned from a DCHP server such as the Ethernet Modem Router The DHCP server draws from a defined pool of IP addresses and leases them for a specified amount of time to your computers when they log onto the network It monitors collects and redistributes the addresses as needed On a DHCP enabled network the IP information is assigned dynamically rather than statically A DHCP client can be assigned a different address from the pool each time it reconnects to the network Why use DHCP DHCP allows you to manage and distribute IP addresses throughout your network from a central computer Without DHCP you would have to configure each computer separately with IP addresses and related information DHCP is commonly used with large networks and those that are frequently expanded or otherwise updated TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 94 Ethernet Modem Router DHCP modes The device can be configured as a DHC
137. ily unavailable Upon reboot Autodetect will begin searching for a valid VC and will create a PPP an EoA or an IPoA interface on your modem corresponding to the type of interface detected on the access server You can monitor the success or failure of the Autodetect process by displaying the System Log page located in the Admin tab If you disable Autodetect be sure to commit your changes Also when Autodetect is disabled you must manually configure ATM VC information as described in Configuring the ATM VC on page 58 185 A IP Addresses Network Masks and Subnets IP Addresses Note This section pertains only to IP addresses for IPv4 version 4 of the Internet Protocol IPv6 addresses are not covered IP addresses the Internet s version of telephone numbers are used to identify individual nodes computers or devices on the Internet Every IP address contains four numbers each from 0 to 255 and separated by dots periods e g 20 56 0 211 These numbers are called from left to right field1 field2 field3 and field4 This style of writing IP addresses as decimal numbers separated by dots is called dotted decimal notation The IP address 20 56 0 211 is read twenty dot fifty six dot zero dot two eleven Structure of an IP address IP addresses have a hierarchical design similar to that of telephone numbers For example a 7 digit telephone number starts with a 3 digit prefix that identifies a group of thous
138. ination When TCP and IP are bundled with higher level applications such as HTTP FTP Telnet etc TCP IP refers to this whole suite of protocols Telnet An interactive character based program used to access a remote computer While HTTP the web protocol and FTP only allow you to download files from a remote computer Telnet allows you to log into and use a computer from a remote location TFTP Trivial File Transfer Protocol A protocol for file transfers TFTP is easier to use than File Transfer Protocol FTP but not as capable or secure TTL Time To Live A field in an IP packet that limits the life span of that packet Originally meant as a time duration the TTL is usually represented instead as a maximum hop count each router that TDM E400 TDM C400ADSL2 Ethernet Modem Router User s Manual 196 receives a packet decrements this field by one When the TTL reaches zero the packet is discarded twisted pair The ordinary copper telephone wiring long used by telephone companies It contains one or more wire pairs twisted together to reduce inductance and noise Each telephone line uses one pair In homes it is most often installed with two pairs For Ethernet LANs a higher grade called Category 3 CAT 3 is used for 10BASE T networks and an even higher grade called Category 5 CAT 5 is used for 100BASE T networks See also 10BASE T 100BASE T Ethernet upstream The direction of data transmission from the user to th
139. ing page 173 DNS 97 103 191 defined 103 relay 104 DNS Configuration page 105 Domain name 97 191 defining for ADSL Ethernet router 45 Domain Name System See DNS Download 192 DSL defined 192 DSL interface IP address 91 DSL Interval Statistics page 171 DSL Modem Setup Wizard Welcome page 28 DSL Parameters page 170 DSL Statistics page 170 DSL Status page 169 Dynamically assigned IP addresses 93 EOA defined 67 EOA interface 91 EOA Interface Add page 69 EOA page 67 Eth 0 interface defined 36 Ethernet defined 192 Ethernet cable 20 straight through vs crossover 188 Features 17 Filter NAT flavor 131 Filtering rule 192 Firewall 192 settings 136 Firewall Blacklisted Hosts page 138 Firewall Configuration page 135 FTP 192 Gateway defined 107 in DHCP pools 97 Hardware connections 19 20 Hardware IDs 76 Home page System View 41 Home Tab 41 Hop 192 defined 107 Hop count 113 192 Host 192 Host ID 185 HTTP 192 HTTP port modifying address 181 IGMP configuring on LAN interface 54 Image Upgrade page 161 Images storing and restoring 179 Internet 193 troubleshooting access to 188 Intranet 193 Index 199 IP address in device s routing table 108 IP address pools modifying 99 IP Address Table page 91 IP addresses 193 explained 185 v
140. ion 41 The Home Page and System View Table The Home page displays when you first access the program or if another tab is already displaying when you click on the Home tab Figure 11 System View Table The Home page contains the System View table which provides a snapshot of your system configuration Note that some settings link to the related pages in Web Configuration where you can change the data or view details The following table describes each section of the System View table Table Heading Description Device Displays basic information about the Ethernet Modem Router hardware and software versions the system uptime since the last reboot and the pre configured operating mode DSL Displays the operational status version and performance statistics for the DSL line You can click on DSL in the table heading or display the WAN tab to view additional DSL settings which are described in Chapter 16 TDM E400 TDM E400 TDM C400 ADSL2 Modem Router User s Manual 42 Table Heading Description WAN Interfaces Displays the software name s and various settings for the device interface s that communicate with your ISP via DSL Although you only have one physical DSL port multiple software defined interfaces can be configured to use it Most users need only one See Chapter 5 for more information about configuring the WAN interfaces For each interface a Lower Interface name such as aal5 0 should disp
141. isabled the device cannot be used to provide Internet connectivity or routing services for your network Encapsulation Determines the type of data link your ISP uses to communicate with your ADSL2 Ethernet Modem Router Chapter 5 VCI and VPI Determine the unique data path your modem uses to communicate with your ISP Chapter 5 Bridge Enables or disables bridging between the Ethernet Modem Router and your ISP Chapter 6 IGMP Used to enable the WAN interface to pass Internet Group Management Protocol messages it receives to the LAN PCs You must also enable the LAN or USB interfaces for IGMP Chapter 4 IP Address and Subnet Mask If your ISP has provided a public IP address to your LAN enter the address and the associated subnet mask in the boxes provided Note In bridge configurations the public IP address may be entered on your PC rather than on the ADSL2 Ethernet Modem Router check with your ISP Chapter 5 Use DHCP When enabled your ISP will assign IP addresses to your WAN interface When disabled the WAN interface must Chapter 5 Default Route When enabled specifies that the WAN interface IP address specified above will be used as the default route for your LAN Whenever one of your LAN computers attempts to access the Internet the data will be sent via this interface Chapter 5 Gateway IP Address Specifies the IP address that identifies the ISP server through which your Internet connection
142. ives when one of the servers is down or is encountering heavy traffic ISPs typically provide primary and secondary DNS addresses and may provide additional addresses Your LAN PCs learn these DNS addresses in one of the following ways Statically If your ISP provides you with their DNS server addresses you can assign them to each PC by modifying the PCs IP properties Dynamically from a DHCP pool You can configure the DHCP Server feature on the ADSL2 Ethernet Modem Router and create an address pool that specifies the DNS addresses to be distributed to the PCs Refer to Configuring DHCP Server on page 95 for instructions on creating DHCP address pools In either case you can specify the actual addresses of the ISP s DNS servers on the PC or in the DHCP pool or you can specify the address of the LAN interface on the ADSL ADSL2 Ethernet Modem Router e g 192 168 1 254 When you specify the LAN interface IP address the device performs DNS relay as described in the following section Note If you specify the actual DNS server addresses on the PCs or in the DHCP pool the DNS relay feature is not used TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 104 Configuring DNS Relay When you specify the Ethernet Modem Router s LAN interface IP address as the DNS address then the device automatically performs DNS relay i e because the device itself is not a DNS server it forwards domain name look
143. k interface card NIC and or a single computer with a USB port An Ethernet hub or switch if you are connecting the device to more than one computer on an Ethernet network For system configuration using the supplied web based program a web browser such as Internet Explorer v5 0 or later or Netscape v6 1 or later TDM E400 TDM C400 ADSL Ethernet Modem Router User s Manual 18 Parts Check In addition to this document your Ethernet Modem Router should arrive with the following Bridge Router RJ 45 Cable straight through type RJ 11 Standard phone DSL line cable USB Cable for Ethernet USB combo model only AC Power Adapter User s Guide USB Driver CD Getting Support All packages have been checked carefully for their completeness and functionality before shipped Please contact the place of purchase if any of the above listed items is missing or damaged 19 2 Quick Start This Quick Start provides basic instructions for connecting the Ethernet Modem Router to a computer or LAN and to the Internet Quick Start Part 1 describes setting up the hardware Quick Start Part 2 describes how to configure Internet properties on your computer s and how to install the software for using a computer attached to the USB port optional Quick Start Part 3 shows you how to configure basic settings on the Ethernet Modem Router to get your LAN or PC connected to the Internet After setting up and configurin
144. lay You can click on the lower interface name to view or change the ATM VC settings that this interface uses LAN Interface Displays the software names and various settings for the device interfaces that communicate directly with your network These typically include an Ethernet interface named eth 0 and may include a USB interface named usb 0 For information on modifying properties of these interfaces see Chapter 4 Services Summary Displays the status of various services that the Ethernet Modem Router performs to help you manage your network A green check mark indicates the service is active and a red X indicates that it is inactive o NAT Translates private IP addresses to your public IP address The type of NAT interface is indicated inside outside See Chapter 12 o IP Filter Allows setting up filtering rules that accept or deny incoming or outgoing data See Chapter 14 o RIP Enables router to router communication See Chapter 5 o DHCP Relay Enables dynamic assignment of IP information from your ISP to your computers See Chapter 8 o DHCP Client Enables dynamic assignment of IP information from your ISP or another computer on your network to the device s LAN interface See Chapter 4 o DHCP Server Enables dynamic assignment of IP information from the device s built in DHCP server to your LAN computers See Chapter 8 o IGMP Enables message forwarding from external sources such as your ISP
145. lick at the bottom of the Firewall Configuration page The Firewall Blacklisted Hosts page displays Figure 58 Firewall Blacklisted Hosts Page The table displays the following information for each entry Field Description Host IP Address The IP address of the computer that sent the packet s that caused the violation Reason A short description of the type of violation If the packet violated an IP filter rule the custom text from the Log Tag field will display See Creating IP Filter Rules on page 142 IPF Rule ID If the packet violated an IP filter rule this field will display the ID assigned to the rule Action s Displays an icon you can click on to delete the entry from the list if you want it to be removed prior to its automatic timed expiration 139 14 Configuring Filters and Blocking Protocols This chapter describes Web Configuration features that enable you to control the data passing through your network The IP filter feature enables you to create rules to block attempts by certain computers on your LAN to access certain types of data or Internet locations You can also block incoming access to computers on your LAN Although IP filter rules provide a very flexible and powerful tool to enhance network security and control user activity they can also be complex and generally require an advanced understanding of IP protocols The bridge filter feature is similar to the IP filter feature but
146. lick to reset all statistics to zero and to display any newly accumulated data 115 Part 4 Security Features TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 116 About Part 4 Part 4 describes features you can configure to provide security to your network Part 4 contains the following chapters Chapter 12 Configuring Network Address Translation explains how NAT works to allow one public Internet address to be shared among multiple PCs on your LAN This chapter explains how to configure NAT rules of various types Chapter 13 Configuring Firewall Settings describes the protections available in the embedded firewall and how to enable and disable them Chapter 14 Configuring Filters and Blocking Protocols describes how to create filters that allow or disallow various types of content and how to block certain types of protocols from entering or exiting your LAN 117 12 Configuring Network Address Translation This chapter provides an overview of Network Address Translation NAT and instructions for modifying the Ethernet Modem Router s default configuration Overview of NAT Network Address Translation is a method for disguising the private IP addresses you use on your LAN as the public IP address you use on the Internet You define NAT rules that specify exactly how and when to translate between public and private IP addresses Definitions A private IP address is cre
147. ll or IP filter restrictions o Deny All packets are denied on all interfaces except those specifically accepted by a bridge filter rule Do not select CallMgt option it is for manufacturer use only Adding Bridge Filter Rules Adding and enabling a new bridge filter rule is a multi step process First you add the rule which defines general information such as the rule number the direction of traffic it applies to and the action to be taken when a match is detected Next you add one or more subrules which specify the specific criteria that the bits in the packet must meet A packet must match the rule criteria and all criteria in its subrules in order for the rule action to taken Finally you enable the rule and any subrules that you want to be in effect and then enable the bridge filtering service Follow this process to add a rule then proceed to the next set of steps to add subrules 1 On the main Bridge Filter page click to display the Bridge Filter Rule Add page Figure 64 Bridge Filter Rule Add Page TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 152 2 Enter or select data for each field that applies to your rule defined as follows Field Description Rule ID Each rule must be assigned an ID number Rules are processed from lowest to highest on each data packet until a match is found Rule numbers up to 99 are reserved for preconfigured system rules Rule IDs must star
148. lopment and test environments to eliminate unneeded variables when evaluating IP protocol processing To configure an IPoA interface log into Web Configuration click the WAN tab and then click IPoA in the task bar The IPoA Configuration page displays Figure 25 IPoA Configuration Page The table contains a row for each IPoA interface currently defined The table may initially be empty The following table describes the fields on this page Field Description Interface The name the software uses to identify the IPoA interface Interface Sec Type The type of security protections in effect on the interface public private or DMZ o A public interface connects to the Internet IPoA interfaces are typically public Packets received on a public interface are subject to the most restrictive set of firewall protections defined in the software o A private interface connects to your LAN such as the Ethernet interface Packets received on a private interface are subject to a less restrictive set of protections because they originate within the network The term DMZ de militarized zone in Internet networking terms refers to computers that are available for both public and in network accesses such as a company s public Web server Packets incoming on a DMZ interface whether from a LAN or external source are subject to a level of protection that is in between those for public and private interfaces RFC 1577 Specifies
149. lowing section to check whether your PC can communicate with the Ethernet Modem Router s LAN IP address by default 192 168 1 254 If it cannot check the Ethernet cabling Verify that you are using Internet Explorer v5 0 or later or Netscape Navigator v6 1 or later Support for Javascript must be enabled in your browser Support for Java may also be required Verify that the PC s IP address is defined as being on the same subnet as the IP address assigned to the LAN interface on the Ethernet Modem Router My changes to Web Configuration are not being retained Be sure to use the Commit function after any changes This function is described on page 46 190 C Glossary 10BASE T A designation for the type of wiring used by Ethernet networks with a data rate of 10 Mbps Also known as Category 3 CAT 3 wiring See also data rate Ethernet 100BASE T A designation for the type of wiring used by Ethernet networks with a data rate of 100 Mbps Also known as Category 5 CAT 5 wiring See also data rate Ethernet 802 11a An IEEE standard for wireless communication providing bandwidth up to 54 Mbps and signals in a regulated 5 GHz range 802 11a is a higher cost solution but is less likely to be affected by signal interference from other devices 802 11b An IEEE standard for wireless communication providing bandwidth up to 11 Mbps comparable to traditional Ethernet and signals in an unregulated 2 4 GHz range 802 11
150. ly To use ping you must know the IP address or domain name of the computer you want to communicate with For example you can test whether the path to the ISP is working if you know the IP address of their access server The Diagnostics page provides a utility for executing ping Follow these steps 1 Display the WAN tab click Diagnostics in the task bar and click at the bottom of the Diagnostics page The Diagnostics Ping page displays Figure 80 Diagnostics Ping Page 2 In the Dest IP Address text boxes type the IP address of the computer you want to ping Or in the Dest Hostname text box type the domain name of the target site such as yahoo com or mydomain net 3 Click In a few seconds the lower table will display values indicating the results after 4 ping packets have been transmitted If a connection is detected the Packets Received value will also equal 4 If no connection can be detected after 4 attempts then the Packets Received value will be 0 and the Percent Packet Loss will be 100 TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 174 Using the Traceroute Utility You can use the traceroute utility to view the IP addresses of all the hops that an IP packet makes from the Ethernet Modem Router on its way to an Internet destination You can use the results of a traceroute to determine where a delay or transmission error is occurring The traceroute utility sends a spe
151. ly packets that match rules or log only packets that do not match rules This information can be e mailed to designated administrators See Configuring Firewall Settings on page 135 for instructions 3 When you are finished you can enable the rule by clicking the Enable radio button at the top of the Bridge Filter Rule Add page Note however that a newly created rule even when enabled will not have any effect on traffic until at least one subrule has been added and enabled You can leave the rule disabled for now the default and enable it after configuring subrules 4 Click and then click on the confirmation page The Bridge Filter Configuration page displays with the new rule at the bottom of the table Chapter 14 Configuring Filters and Blocking Protocols 153 Now you can add subrules to specify criteria for the rule 5 On the Bridge Filter Configuration page click in the Action s column of the rule for which you want to created a subrule The Bridge Filter Subrule Add page displays Figure 65 Bridge Filter Subrule Add Page The page displays Enable and Disable radio buttons you use to determine whether this sub rule is in effect A rule will be in effect if the rule itself and at least one of its subrules is enabled 6 In the New Subrule Information table specify the criteria for the rule as follows Field Description Subrule ID A unique ID number for this subrule These number
152. mit them Chapter 5 Configuring the WAN Interfaces 67 Configuring EoA Interfaces The Ethernet over ATM EoA protocol is often referred to as RFC1483 which is the Internet specification that defines it It is commonly used to carry data from an Ethernet based local area network over the ATM based wide area network Unlike PPP EoA can be implemented to provide a bridged connection between a DSL modem and the ISP In a bridged connection data is shared between the ISP s network and their customer s as if the networks were on the same physical LAN Bridged connections do not use the IP protocol EoA can also be configured to provide a routed connection with the ISP which uses the IP protocol to exchange data See Chapter 6 Configuring the System Operating Mode for more information on bridged and routed Internet connections Before creating an EoA interface or modifying the default settings contact your ISP to determine which type of protocol they use Note PPP and EoA Bridged Internet connections must use an EoA WAN interface Routed Internet connections can use an EoA if configured with an IP address or a PPP interface See Chapter 5 for more information To view your current EoA interface configuration log into Web Configuration click the WAN tab and then click EOA in the task bar The RFC1483 EoA Config page displays Figure 21 RFC1483 EoA Config Page The EoA table contains a row for each EoA interfac
153. municating with the LAN PCs This capability allows units to be delivered to customers with one preconfiguration for both deployment types If BRAS is to be used the modem must be preconfigured with both PPPoE and EoA interfaces and bridging must be enabled When the modem is booted up with BRAS enabled the mode is determined as follows 1 The modem comes up with both bridging and routing enabled with its own internal PPPoE client active 2 If the modem subsequently detects PPPoE traffic from the LAN PC s PPPoE client indicating a bridge deployment then the modem automatically switches to bridging mode by stopping its own PPPoE client causing PPPoE packets to be bridged from the LAN side 3 Otherwise no PPPoE traffic is detected the modem continues to operate as before in bridging mode non PPPoE traffic as well as routing mode Follow these instructions to enable Bridge Router AutoSense 1 Ensure that both a PPPoE and an EoA interface is established and that the EoA interface has been made bridgeable see Making Interfaces Bridgeable Bridge Enabled on page 79 2 Click the Home tab to display the Home page then select System Mode in the task bar 3 Ensure that the Bridging Enabled radio button is selected 4 Click the BRAS Enabled radio button and then click A page displays briefly to confirm the change and the System Mode page redisplays 5 If you want the changes to be permanent follo
154. n be small such as a LAN or very large such as the Internet network mask A network mask is a sequence of bits applied to an IP address to select the network ID while ignoring the host ID Bits set to 1 mean select this bit while bits set to 0 mean ignore this bit For example if the network mask 255 255 255 0 is applied to the IP address 100 10 50 1 the network ID is 100 10 50 and the host ID is 1 See also binary IP address subnet IP Addresses Explained section NIC Network Interface Card An adapter card that plugs into your computer and provides the physical interface to your network cabling which for Ethernet NICs is typically an RJ 45 connector See Ethernet RJ 45 packet Data bundled into a specific format to enable transmission on a network A packet contains a payload the data and overhead information such as where it came from source address and where it should go destination address ping Packet Internet or Inter Network Groper A program used to verify whether the host associated with an IP address is online It can also be used to reveal the IP address for a given domain name port A physical access point to a device such as a computer or router through which data flows into and out of the device PPP Point to Point Protocol A protocol for serial data transmission that is used to carry IP and other protocol data between your ISP and your computer The WAN interface on the Ethernet Modem Router
155. nent follow the instructions on page 46 to commit them The other features shown on the System Mode page are described in Configuring Special Bridging Features on page on page 84 Chapter 6 Configuring the System Operating Modes 81 Common Scenarios The sections that follow describe common system configurations that use bridging routing or both Note that you can also configure several special operating modes These are described in Configuring Special Bridging Features on page 84 Scenario 1 Routed Connection to ISP In this scenario the ISP requires customers to have a routed connection to their access server For a routed connection the LAN and WAN interfaces must be IP enabled No bridging services need to be enabled This configuration would have these features An Ethernet and or USB interface with an IP address and network mask that identify it as being in the same subnet as your LAN PCs See Chapter 4 for instructions An IP enabled WAN interface The interface type can be PPP or EoA An IPoA interface can also be used but they are rarely used in customer settings See Chapter 5 for instructions o If an EoA interfaces is created an IP address should be assigned to it Or the interface should be configured to receive an IP address through DHCP o For PPP interfaces IP information is assigned when the link is negotiated o For either type of WAN interface the Default Gateway check box is normall
156. ng Diode An electronic light emitting device The indicator lights on the front of the Ethernet Modem Router are LEDs MAC address Media Access Control address The permanent hardware address of a device assigned by its manufacturer MAC addresses are expressed as six pairs of characters mask See network mask Mbps Abbreviation for Megabits per second or one million bits per second Network data rates are often expressed in Mbps microfilter In splitterless deployments a microfilter is a device that removes the data frequencies in the DSL signal so that telephone users do not experience interference noise from the data signals Microfilter types include in line installs between phone and jack and wall mount telephone jack with built in microfilter See also splitterless NAT Network Address Translation A service performed by many routers that translates your network s publicly known IP address into a private IP address for each computer on your LAN Only your router and your LAN know these addresses the outside world sees only the public IP address when talking to a computer on your LAN NAT rule A defined method for translating between public and private IP addresses on your LAN TDM E400 TDM C400ADSL2 Ethernet Modem Router User s Manual 194 network A group of computers that are connected together allowing them to communicate with each other and share resources such as software files etc A network ca
157. nslate the port numbers in the packet header they are passed through untranslated Therefore the Basic rule does not provide the same level of security as the NAPT rule Figure 53 shows the fields used for adding a Basic rule Figure 53 NAT Rule Add Page Basic Flavor Follow these instructions to add a Basic rule see steps 1 4 under The NAPT rule on page 125 for specific instructions corresponding to steps 1 and 2 below 1 Display the NAT Rule Add Page select BASIC as the Rule Flavor and enter a Rule ID 2 Select the interface on which this rule will be effective 3 Select a protocol to which this rule applies or choose ANY This selection specifies which type of Internet communication will be subject to this translation rule You can select ALL if the rule applies to all data Or select TCP UDP ICMP or a number from 1 255 that represents the Internet Assigned Numbers Authority IANA specified protocol number 4 In the Local Address From and Local Address To fields type the starting and ending IP addresses that identify the range of private address you want to be translated Or type the same address in both fields If you specify a range each address will be translated in sequence to a corresponding address in a range of global addresses which you specify in step 5 You can create a Basic rule for each specific address translation to occur The range of addresses should correspond to private addr
158. nt Information Database or MIB on the modem When SNMP is enabled the modem responds to SNMP requests from the host The host may ask to read data from the MIB or when its privileges allow write data to it Privilege levels are defined by the SNMP communities configured on the modem A community is a named group of IP addresses These addresses identify the hosts that are permitted to act as SNMP management stations for accessing the MIB Each community is defined as having either read only or read write privileges The data stored in the MIB includes the standard items defined for the SNMP protocol and custom items defined by the ISP The MIB contents are preconfigured by the ISP and cannot be managed via the Web based interface A complete SNMP setup includes the following items A management station equipped with an SNMP manager client that enables sending messages to an SNMP agent e g the modem This configuration is not described here A MIB stored in the modem s memory This must be preconfigured in the software image by the ISP The SNMP service enabled on the modem including defined communities that allow read only or read write accesses from specific hosts This configuration is described below Creating Communities 1 Log into Web Configuration click the Admin tab and then click SNMP Config in the task bar The SNMP Configuration page displays Figure 71 SNMP Configuration 2 On the SNMP Configuration
159. nterface with a pool of private IP addresses for dynamic assignment to your LAN computers To use this service you must set up your computers to accept IP information dynamically as described in Quick Start Part 2 USB Static IP address 192 168 1 2 Subnet mask 255 255 255 0 The USB interface can connect to a single USB enabled computer with an IP address in the same subnet See Chapter 4 for instructions WAN interface connecting to the Internet ATM VC VPI 0 VCI 35 The VPI and VCI values make up a VC virtual circuit that determines the path your data must take to connect over the phone lines to the ISP These values must be changed as directed by your ISP See Chapter 5 for more information PPP interface PPPoE interface Login guest Password guest The PPP interface determines the method of communication with your ISP and logging in to their servers A particular type of PPP interface PPP over Ethernet PPPoE is configured by default with the ISP login information shown See Configuring PPP Interfaces on page 61 for instructions on modifying this information as required by your ISP Services NAT Network Address Translation NAPT rule enabled Your computers private IP addresses see DHCP above will be translated to your public IP address whenever they access the Internet See Chapter 4 for a description of the NAT service Chapter 2 Quick Start 37 Testing Your Setup The Quick
160. nterfaces in terms of restrictiveness Protocol The type of PPP protocol used Your ISP may use PPP over Ethernet PPPoE or PPP over ATM PPPoA WAN IP The IP address currently assigned by your ISP to the interface Gateway IP The IP address provided by your ISP of the server that provides you access to the Internet See Hops and gateways on page 107 for a description of gateway addresses Chapter 5 Configuring the WAN Interfaces 63 Field Description Default Route Indicates whether the ADSL2 Ethernet Modem Router should use the IP address assigned to this connection as its default route Can be Enabled or Disabled See Chapter 10 for an explanation of default routes Use DHCP When set to Enable the device will acquire additional IP information from the ISP s DHCP server The PPP connection itself acquires the device s IP address mask DNS address and default gateway address With Use DHCP enabled the device will acquire IP addresses for various other server types WINS SMTP POP3 etc these server types are listed on the DHCP Server Configuration page in the LAN tab Use DNS When set to Enable the DNS address learned through the PPP connection will be distributed to clients of the device s DHCP server This option is useful only when the ADSL ADSL2 Ethernet Modem Router is configured to act as a DHCP server for your LAN When set to Disable LAN hosts will use the DNS address es specified in th
161. odes 78 Configuring Routable and Bridgeable Interfaces 79 Making Interfaces Routable IP Enabled 79 Making Interfaces Bridgeable Bridge Enabled 79 Enabling Bridging Mode 80 Common Scenarios 81 Scenario 1 Routed Connection to ISP 81 Scenario 2 Bridged Connection to ISP 82 Scenario 3 Routed and Bridged Connections to ISP 83 Configuring Special Bridging Features 84 Configuring WAN to WAN Bridging 84 Configuring Bridge Router AutoSense BRAS Mode 85 Configuring ZIPB Mode 86 Part 3 Routing and IP Related Features About Part 3 90 7 Viewing System IP Addresses and IP Performance Statistics 91 Viewing the Ethernet Modem Router s IP Addresses 91 Viewing IP Performance Statistics
162. omputers with its LAN interface e g eth 0 or usb 0 and the hardware IDs of your ISP s access server s with its WAN interface e g eoa 0 When the bridge receives a data packet the bridge compares the packet s destination hardware ID to the entries in its bridge forwarding table When the packet s destination ID matches one of the entries it forwards the packet through the associated interface where the computer with the matching hardware ID can claim the packet When the bridge does not recognize a packet s destination hardware ID it broadcasts the packet through all of its interfaces to each network it is attached to Hardware IDs are also referred to as Media Access Control MAC addresses Ethernet is a commonly used MAC layer network protocol Bridges provide a simple way to allow two or more Ethernet based networks to share data without requiring additional internetworking protocols Bridges generally cannot link networks that use different MAC layer protocols Chapter 6 Configuring the System Operating Modes 77 How Routers Work Routers use a higher layer protocol than bridges use to determine how to pass data between two networks Routers such as the Ethernet Modem Router operate based on the Internet Protocol and use IP addresses to identify where to send data Unlike a MAC address an IP address is not permanently associated with a particular piece of hardware but is assigned to a computer by its
163. on RMA number accompanied by a copy of the dated proof of the purchase Products returned to TRENDnet must be pre authorized by TRENDnet with RMA number marked on the outside of the package and sent prepaid insured and packaged appropriately for safe shipment WARRANTIES EXCLUSIVE IF THE TRENDNET PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE THE CUSTOMER S SOLE REMEDY SHALL BE AT TRENDNET S OPTION REPAIR OR REPLACEMENT THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED EITHER IN FACT OR BY OPERATION OF LAW STATUTORY OR OTHERWISE INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TRENDNET NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE OR USE OF TRENDNET S PRODUCTS TRENDNET SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER S OR ANY THIRD PERSON S MISUSE NEGLECT IMPROPER INSTALLATION OR TESTING UNAUTHORIZED ATTEMPTS TO REPAIR OR MODIFY OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE OR BY ACCIDENT FIRE LIGHTNING OR OTHER HAZARD LIMITATION OF LIABILITY TO THE FULL EXTENT ALLOWED BY LAW TRENDNET ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY WHETHER BASED IN CONTRACT OR TORT INCLUDING NEGLIGENCE FOR INCIDENTAL CONSE
164. on related to system events alarms and DSL line performance and how to run a diagnostic program to troubleshoot problems Viewing System Alarms You can use the Web Configuration to view information about alarms that occur in the system Alarms also called traps are caused by a variety of system events including connection attempts resets and configuration changes This information may be helpful in working with your ISP to troubleshoot problems you encounter with the device Despite their name not all alarms indicate problems in the functioning of the system Viewing the Alarm Table To display the Alarm page log into the Web Configuration click the Admin tab and then click Alarm in the task bar The Alarm page is shown in Figure 73 Figure 73 Alarm Page Each row in the table displays the time and date that an alarm occurred the type of alarm and a brief statement indicating its cause You can click on the Refresh Rate drop down list to select a recurring time interval after which the page will redisplay with new data You can click to display a Windows File Download dialog box that enables opening or saving the contents of the log to your PC The file is assigned the default name alarm vlf and can be viewed with any text editor To remove all entries from the list click New entries will begin accumulating and will display when you click TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual
165. onal conventions Acronyms are defined the first time they appear in text and in the glossary Appendix C The Ethernet Modem Router is also referred to as the ADSL2 Ethernet Modem Router or for brevity the device The terms LAN and network are used interchangeably to refer to a group of Ethernet connected computers Typographical conventions Italics are used to identify terms that are defined in the glossary Appendix A Bolded text is used to identify items you select from menus and drop down lists and text strings you type Special messages This document uses the following icons to call your attention to specific instructions or explanations Note Provides clarifying or non essential information on the current topic Definition Explains terms or acronyms that may be unfamiliar to many readers These terms are also included in the Glossary WARNING Provides messages of high importance including messages relating to personal safety or system integrity 15 Part 1 Getting Started TDM E400 TDM C400 ADSL Ethernet Modem Router User s Manual 16 About Part 1 Part 1 provides an overview of the Ethernet Modem Router s features and basic setup and configuration instructions All users are encouraged to follow these setup instructions when first installing the Ethernet Modem Router on a network Some users may find these instructions sufficient to begin using the device on their network with no
166. onfirm your changes and close the Control Panel Chapter 2 Quick Start 23 Windows 2000 PCs First check for the IP protocol and if necessary install it 1 In the Windows task bar click the Start button point to Settings and then click Control Panel 2 Double click the Network and Dial up Connections icon 3 In the Network and Dial up Connections window right click the Local Area Connection icon and then select Properties The Local Area Connection Properties dialog box displays with a list of currently installed network components If the list includes Internet Protocol TCP IP then the protocol has already been enabled Skip to step 10 4 If Internet Protocol TCP IP does not display as an installed component click 5 In the Select Network Component Type dialog box select Protocol and then click 6 Select Internet Protocol TCP IP in the Network Protocols list and then click You may be prompted to install files from your Windows 2000 installation CD or other media Follow the instructions to install the files 7 If prompted click to restart your computer with the new settings Next configure the PCs to accept IP information assigned by the Ethernet Modem Router 8 In the Control Panel double click the Network and Dial up Connections icon 9 In Network and Dial up Connections window right click the Local Area Connection icon and then select Properties 10 In the Lo
167. page type a community name in the empty text box in the left column of the table TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 166 3 From the Access column of the table select the privileges Read Only or Read Write to assign to all hosts that are part of this community 4 Click A page displays briefly to confirm your changes and then the SNMP Configuration page redisplays with the new entry Now you can add hosts to the new community Adding Hosts to Communities 1 In the Action column click The SNMP Add Host page displays in a separate window Figure 72 SNMP Host Add Page 2 Enter the IP address of the host computer you want to add and click A page displays briefly to confirm the addition and the SNMP Add Host page redisplays 3 Continue adding hosts as required and click when done The newly added hosts now have access to the MIB with the privilege level associated with the community Viewing Hosts To view all hosts and the communities to which they are assigned click on the main SNMP Configuration page Viewing Global SNMP Statistics To view statistics relating to SNMP packets received and sent and packet errors click on the main SNMP Configuration page The SNMP Global Statistics page shows the number and type of packets transmitted 167 16 Monitoring System Status and Performing Diagnostics This chapter shows you where to find informati
168. parate browser window TDM E400 TDM C400 ADSL2 Modem Router User s Manual 44 Figure 12 System Modify Page 2 Modify the fields on this page as required The following table describes each field Option Description SNTP To enable SNTP click the Enable radio button The remaining date and time fields will be dimmed unavailable for entry Date and Time To set the date and time manually ensure that the SNTP field is set to Disable Click the date and time check boxes to select the appropriate values from the drop down lists The time displays in military format Time Zone Daylight Savings Time If you are setting the date and time manually you can select your time zone from the drop down list and then click the appropriate radio button to indicate whether Daylight Savings Time is currently in effect After you initially set the time turning DST on or off will adjust the current displayed time by one hour in the appropriate direction You must remember to change the DST option each spring and fall it will not change automatically 3 When you are finished modifying the settings click and then click to return to the System View page 4 To save your changes to permanent memory click the Admin tab and then click Commit amp Reboot in the task bar 5 Click to save your changes to permanent memory Chapter 3 Getting Started with Web Configuration 45 Specifying the TDM E400 TDM
169. r or lower level devices No single device knows at the outset the eventual path the data will take but each uses a specific part of the destination address phone number to make a decision about which device to connect to next Chapter 10 Configuring IP Routes 107 Hops and gateways Each time Internet data is passed from one Internet address to another it is said to take a hop A hop can be a handoff to a different port on the same device to a different device on the same network or to a device on an entirely different network When a hop passes data from one type of network to another it uses a gateway A gateway is an IP address that provides initial access to a network just as a switchboard serves as a gateway to a specific set of phone numbers For example when a computer on your LAN requests access to a company s web site your ISP serves as a gateway to the Internet As your request reaches its destination another gateway provides access to the company s web servers Using IP routes to define default gateways IP routes are defined on computers routers and other IP enabled devices to instruct them which hop to take or which gateway to use to help forward data along to its specified destination If no IP route is defined for a destination then IP data is passed to a predetermined default gateway The default gateway serves like a higher level telephone switchboard it may not be able to connect directly to the de
170. r User s Manual 28 Connecting a computer to the USB port For Ethernet USB model only If you use the Ethernet Modem Router s USB port to connect to a PC you must install the provided USB driver software on the PC The driver enables Ethernet over USB communication with the Ethernet Modem Router Configuring the USB computer is a two part process In USB Driver Installation Part 1 you install the USB driver on the PC In USB Driver Installation Part 2 you configure the IP properties on the PC USB Driver Installation Part 1 Installing the USB Driver on the PC 1 Ensure that the USB cable is not connected to the USB port on the PC The installation program will prompt you when to connect the cable 2 Copy the USB installation files to a temporary directory on the USB computer 3 In the folder where you copied the files double click on setup exe to start the DSL Modem Setup Wizard The Welcome page for the DSL Modem Setup Wizard displays Figure 2 DSL Modem Setup Wizard Welcome Page 4 Click The License Agreement page displays Chapter 2 Quick Start 29 Figure 3 DSL Modem Setup Wizard License Agreement Page 5 Review the terms of the license and if you agree to the terms click The Installing window displays as the Wizard prepares your system for the installation Figure 4 USB Setup Wizard Installing Page If a Microsoft digital signature dialog box displays click to
171. r adding a default route is described on page 110 You may need to define routes if your home setup includes two or more networks or subnets if you connect to two or more ISP services or if you connect to a remote corporate LAN TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 108 Viewing the IP Routing Table All IP enabled computers and routers maintain a table of IP addresses that are commonly accessed by their users For each of these destination IP addresses the table lists the IP address of the first hop the data should take This table is known as the device s routing table To view the Ethernet Modem Router s routing table click the Routing tab The IP Route page displays by default Figure 41 IP Route Table Page The IP Route Table displays a row for each existing route These include routes that were predefined on the device routes you may have added and routes that the device has identified automatically through communication with other devices The routing table should reflect a default gateway which directs outbound Internet traffic to your ISP This default gateway is shown in the row containing destination address 0 0 0 0 Chapter 10 Configuring IP Routes 109 The following table defines the fields in the IP Routing Table Field Description Destination Specifies the IP address of the destination computer The destination can specified as the IP address of a specific computer o
172. r an entire network It can also be specified as all zeros to indicate that this route should be used for all destinations for which no other route is defined this is the route that creates the default gateway Netmask Indicates which parts of the destination address refer to the network and which parts refer to a computer on the network Refer to Appendix A for an explanation of network masks The default gateway uses a netmask of 0 0 0 0 NextHop Specifies the next IP address to send data to when its final destination is that shown in the destination column IFName Displays the name of the interface on the device through which data is forwarded to the specified next hop Route Type Indicates whether the route is direct or indirect In a direct route the source and destination computers are on the same network and the router attempts to directly deliver the data to the computer In an indirect route the source and destination computers are on different networks and the router forwards data to a device on another network for further handling Route Origin Displays how the route was defined Dynamic indicates that the route was created automatically or predefined by your ISP or the manufacturer Routes you create are labeled Local Other routes may be created automatically using RIP as described in Chapter 11 or defined remotely through various network management protocols LCL or ICMP Action Displays an icon you
173. r information on the system operating modes Get LAN Address Provides options for how the device s LAN interface is assigned an IP address o Manual indicates that you will be assigning a static IP address which you can enter in the fields below o External DHCP Server indicates that your ISP will be assigning an IP address from their own DHCP server dynamically each time you log on o Internal DHCP Server indicates that you have a DHCP server device on your network that will assign an address to the port If you choose either the internal or external server option the LAN interface is called a DHCP client of the server Note that the public IP address assigned to you by your ISP is not your LAN IP address The public IP address identifies the WAN ADSL port on your ADSL ADSL2 Ethernet Modem Router to the Internet Or in bridge configurations it may be assigned to your PC LAN IP Address and Network Mask The IP address and network mask for the port See Appendix A for and overview of IP addresses and masks TDM E400 TDM C400 Ethernet Modem Router User s Manual 54 Speed Duplex Speed indicates the speed of the Ethernet communication between the ADSL2 Ethernet Modem Router and the LAN PCs or hub Duplex indicates the type of Ethernet communication i e full duplex or half duplex These settings are not user configurable IGMP Indicates whether this interface is enabled with the Internet Group Managemen
174. r your LAN click the Enable radio button in the Default Route field Only one WAN interface can be selected as the default route 8 In the Gateway IP Address field enter the address of the Internet computer to contact to gain initial access to the Internet Chapter 5 Configuring the WAN Interfaces 75 9 Click A confirmation page will display to confirm your changes 10 Click to return to the IPoA page and view the new interface in the table IPoA interfaces must be mapped to a lower ATM VC interface before they can be used Follow these instructions to map and IPoA interface to an ATM VC 11 In the IPoA interface table click in the row corresponding to the IPoA interface you want to map The IPoA Map Information page displays Figure 27 IPoA Interface Map Page 12 From the Lower Interface drop down list select the ATM VC interface you want to map the IPoA interface to and then click 13 Click to return to the IPoA Configuration page 14 If you want the changes to be permanent follow the instructions on page 46 to commit them To view all IPoA to ATM VC interface mappings click at the bottom of the IPoA Configuration page not in the table The IPoA Interface Global Map displays Figure 28 IPoA Interface Global Map Page You can click in the Action column to delete an IPoA mapping The IPoA interface itself is not deleted 76 6 Configuring the System Operating Modes
175. radio button and then type the appropriate data in the corresponding text box The destination host name must be in the form of a fully qualified domain name such as yahoo com 3 In the Config Data section change any of the following parameters as needed Field Description Probe Message Type The traceroute can use ping UDP messages to conduct the traceroute Some routers in the path may not support one or the other method Try one and if not working try the other No of Probes per TTL The number of redundant packets that will be sent in each transmission to account for packets dropped due to connection or server problems Maximum hops The maximum number of hops that can be discovered in a traceroute before it terminates Traceroute Timeout secs The number of seconds after sending ping UDP packets that the traceroute will timeout if no reply is received TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 176 Field Description Destination UDP port When the Probe Message Type is specified as UDP the traceroute commands includes an invalid destination UDP port address in the UDP packets When a packet reaches the destination it is dropped and the computer replies with an error message This error message is used to identify the completion of the traceroute This field specifies the invalid UDP port number to use This field is not used if the Probe Message Type is ping 4 Click to
176. raggle Sending packets that use the WAN or LAN IP broadcast address as the source address o Land Attack Sending packets that use the same address as the source and destination address o Ping of Death Illegal IP packet length DoS Protection Click the Enable radio button to use the following denial of service protections o SYN DoS o ICMP DoS o Per host DoS protection Max Half open TCP Connection Sets the percentage of concurrent IP sessions that can be in the half open state In ordinary TCP communication packets are in the half open state only briefly as a connection is being initiated the state changes to active when packets are being exchanged or closed when the exchange is complete TCP connections in the half open state can use up the available IP sessions If the percentage is exceeded then the half open sessions will be closed and replaced with new sessions as they are initiated Max ICMP Connection Sets the percentage of concurrent IP sessions that can be used for ICMP messages If the percentage is exceeded then older ICMP IP sessions will be replaced by new sessions as the are initiated Max Single Host Connection Sets the percentage of concurrent IP session that can originate from a single computer This percentage should take into account the number of hosts on the LAN Chapter 13 Configuring Firewall Settings 137 Field Description Log Destination Specifies how attempted violations of th
177. ropriate reboot mode from the drop down menu and then click You can select from the following reboot options Option Description Reboot Reboots using the settings currently in memory including any changes you made and committed during the current session Reboot from Default Configuration Reboots the device to default settings provided by your ISP or the manufacturer Choosing this option erases any custom settings Reboot from Backup Configuration Reboots the device using the settings that were in effect prior to the most recently committed settings Reboot from Last Configuration Same as Reboot Reboot from Clean Configuration Reboots the device with no configuration This option will disable access to the Web Configuration as no LAN interface will be defined This option is intended only for technicians who have a serial port connection to the device and knowledge of its command line interface Reboot from Minimum Configuration Reboots the device with only these settings o An Ethernet interface is configured with IP address 192 168 1 254 mask 255 255 255 0 o The user login is set to the following User Name admin Password admin Rebooting may take 20 30 seconds If your browser appears to be waiting to reconnect press lt F5 gt on your keyboard to refresh the connection Or retype the URL 192 168 1 254 by default in your browser s address box and press lt Enter gt The page should redi
178. routing path This can be a PPP or EoA interface and must be IP enabled as described in Scenario 1 A WAN interface for the bridging path This must be an EoA interface If an EoA interface was created for the routing path the bridging path may be able to use the same interface Check with your ISP Bridging is enabled on the LAN interface eth 0 and or usb 0 and on the EoA interface to be used for the bridging path If separate interfaces are created for the bridging and routing paths then enable bridging only on the EoA interface to be used for bridging See Making Interfaces Bridgeable Bridge Enabled on page 79 The bridging service is enabled See Enabling Bridging Mode on page 80 For the PCs that will use the routing path the LAN interface s IP address should be specified as the IP gateway whether assigned statically or dynamically from a DHCP server For the PCs that will use the bridging path the ISP should provide setup instructions for the LAN PC s which may involve installing software to enable logging in to their servers called a PPPoE client The PC s gateway IP address should be configured as the IP address of the ISPs access server In the System View page in the Home tab the Mode field will reflect you the Mode field will now reflect Routing and Bridging TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 84 Configuring Special Bridging Features Configuring WAN to WAN Bridging
179. rovide a variety of services to your network The device is pre configured with default settings for use with a typical home or small office network Table 1 lists some of the most important default settings these and other features are described fully in subsequent chapters If you are familiar with network configuration review the settings in Table 1 to verify that they meet the needs of your network Refer to the Quick Configuration page instructions on page 33 or to the document sections referenced in the table for further instructions If you are unfamiliar with these settings try using the device without modification or contact your ISP for assistance Before you attempt to modify any settings review Chapter 3 for general information about accessing and using the Web Configuration program We strongly recommend that you contact your ISP prior to changing the default configuration TDM E400 TDM C400 ADSL2 Modem Router User s Manual 36 Table 1 Default Settings Summary Option Default Properties Explanation Instructions LAN interfaces connecting to your network Ethernet Static IP address 192 168 1 254 Subnet mask 255 255 255 0 DHCP server pool of addresses 192 168 1 3 through 192 168 1 34 The LAN interface connects the device to your Ethernet network Typically you will not need to change the IP address See Chapter 4 for instructions The DHCP service see Chapter 8 is enabled for operation over this i
180. rt translation NAPT You can use other types called flavors of NAT for other purposes for example providing outside access to your LAN or translating multiple private addresses to multiple public addresses For a description of NAPT rules see page 125 Chapter 12 Configuring Network Address Translation 119 Viewing NAT Global Settings and Statistics To view your NAT settings log into Web Configuration and click the Services tab The NAT Configuration page displays by default Figure 45 NAT Configuration Page The NAT Configuration page contains the following elements The NAT Options drop down list which provides access to the NAT Configuration page and Global Information table shown by default and in Figure 45 the NAT Rule Configuration page see Figure 47 and the NAT Translations page see Figure 49 Enable Disable radio buttons which allow you to turn on or off the NAT feature The NAT Global Information table which displays the following settings that apply to all NAT rule translations TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 120 Field Description TCP Idle Timeout sec TCP Close Wait sec TCP Def Timeout sec When two computers communicate via the Internet a TCP based communication session is created between them to control the exchange of data packets The TCP session can be viewed as being in one of three states depending on the types of packets being transferre
181. s are independent from the main rule number The bridge filter processes subrules in sequential order if a packet fails to match the criteria of any subrule then the rule will not be invoked and bridge filter processing will continue to the next rule Offset The number of bits into a packet starting from a designated location where the subrule comparison should begin Offset from The location in a Layer 2 packet where the subrule comparison should begin taking into account any offset bits specified in the previous setting The comparison can start at the beginning of o a Link header i e the start of an Ethernet packet o an IP header o a TCP UPD or ICMP header Mask The bits of the packet specified in hexadecimal starting at the header and offset location that should be used when comparing data to this rule A mask of F0FF for example would look only at the 1st 3rd and 4th bits from the starting location TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 154 Field Description Cmp Type Comparison Type The method for comparing the selected bits after the mask is applied to a reference value or range of values that you specify see the next setting Compared to the reference value the selected bits can be o eq equal to o neq not equal to o lt less than o lteq less than or equal to o gt greater than o gteq greater than or equal to o range any source IP address that is
182. s matches this criterion lt less than gt greater than lteq less than or equal to etc TOD Rule Status The Time of Day Rule Status determines how the Start Time End Time settings are used o Enable Default The rule is in effect for the specified time period o Disable The rule is not in effect for the specified time period but is effective at all other times Chapter 14 Configuring Filters and Blocking Protocols 147 3 When you are done selecting criteria ensure that the Enable radio button is selected at the top of the page and then click After a confirmation page displays the IP Filter Configuration page will redisplay with the new rule showing in the table If the security level of the rule matches the globally configured setting a green ball displays in the Status column for that rule indicating that the rule is now in effect A red ball displays when the rule is disabled or if its security level is different from the globally configured level 4 Ensure that the Security Level and Private Public DMZ Default Action settings on the IP Filter Configuration page are configured as needed then click A page displays to confirm your changes 5 If you want the changes to be permanent follow the instructions on page 46 to commit them IP filter rule examples Example 1 Blocking a specific computer on your LAN from accessing Web servers on the Internet 1 Add a new rule for outgoing packe
183. s to your LAN s public address To an external Internet user then it appears as if your Web server uses your public IP address Figure 52 shows the fields used to establish an RDR rule Figure 52 NAT Rule Add Page RDR Flavor TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 128 Follow these instructions to add an RDR rule see steps 1 4 under The NAPT rule on page 125 for specific instructions corresponding to steps 1 and 2 below 1 Display the NAT Rule Add Page select RDR as the Rule Flavor if necessary and enter a Rule ID 2 Select the interface on which this rule will be effective 3 Select a protocol to which this rule applies or choose ANY This selection specifies which type of Internet communication will be subject to this translation rule You can select ANY if the rule applies to all data Or select TCP UDP ICMP or a number from 1 255 that represents the Internet Assigned Numbers Authority IANA specified protocol number 4 In the Local Address From and Local Address To fields type the same private IP address or the lowest and highest addresses in a range If you type the same IP address in both fields incoming traffic that matches the criteria you specify in steps 5 and 6 will be redirected to that IP address If you type a range of addresses incoming traffic will be redirected to any available computer in that range This option would typically be used for load balancin
184. s type of NAT rule is applied because the source IP address is swapped out it appears to other Internet computers as if the data packets are actually originating from the computer assigned your public IP address in this case the Ethernet Modem Router TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 118 The NAT rule could further be defined to disguise the source port in the data packet i e change it to another number so that outside computers will not be able to determine the actual port from which the packet originated Data packets that arrive in response contain the public IP address as the destination IP address and the disguised source port number The Ethernet Modem Router changes the IP address and source port number back to the original values having kept track of the changes it made earlier and then routes the packet to the originating computer NAT rules such as these provide several benefits They eliminate the need for purchasing multiple public IP addresses for computers on your LAN You can make up your own private IP addresses at no cost and then have them translated to the public IP address when your computers access the Internet They provide a measure of security for you LAN by enabling you to assign private IP addresses and then have these and the source port numbers swapped out before your computers access the Internet The type of NAT function described above is called network address po
185. s with higher level DNS servers to determine the IP address See also domain name domain name A domain name is a user friendly name used in place of its associated IP address For example www globespan net is the domain name associated with IP address 209 191 4 240 Domain names must be unique their assignment is controlled by TDM E400 TDM C400ADSL2 Ethernet Modem Router User s Manual 192 the Internet Corporation for Assigned Names and Numbers ICANN Domain names are a key element of URLs which identify a specific file at a web site e g http www globespan net index html See also DNS download To transfer data in the downstream direction i e from the Internet to the user DSL Digital Subscriber Line A technology that allows both digital data and analog voice signals to travel over existing copper telephone lines Ethernet The most commonly installed computer network technology usually using twisted pair wiring Ethernet data rates are 10 Mbps and 100 Mbps See also 10BASE T 100BASE T twisted pair filtering To screen out selected types of data based on filtering rules Filtering can be applied in one direction upstream or downstream or in both directions filtering rule A rule that specifies what kinds of data the a routing device will accept and or reject Filtering rules are defined to operate on an interface or multiple interfaces and in a particular direction upstream downstream or both
186. ser from any PC connected to the Ethernet Modem Router via the LAN or USB ports This chapter provides basic information on using the Web Configuration Accessing the Web Configuration The Web Configuration program is preinstalled into memory on the Ethernet Modem Router To access the program you need the following A PC or laptop connected to the LAN port on the device as described in the Quick Start chapter A web browser installed on the PC The program is designed to work best with Microsoft Internet Explorer version 5 0 Netscape Navigator version 6 1 or later versions You can access the program from any computer connected to the Ethernet Modem Router via the LAN or USB ports 1 From a computer connected via Ethernet or USB open your web browser type the following URL in the web address or location box and press lt Enter gt http 192 168 1 254 This is the predefined IP address of the Ethernet interface however since the USB interface is in the same subnet as the LAN interface you can use this IP address from a USB computer also A login screen displays Chapter 3 Getting Started with Web Configuration 39 Figure 9 Login Screen 2 Enter your user name and password and then click The first time you log into the program use these defaults Default User Name admin Default Password admin Note You can change the password at any time see Chapter 15 for instructions The
187. signed by a DHCP server See Quick Start Part 2 Configuring Your Computers for instructions 2 Ensure that at least one PPPoE or PPPoA interface has been created on the Ethernet Modem Router See Chapter 5 for instructions The Status field for the PPP interface must be set to Start on Data You can modify an existing interface to set this property Note If you have more than one computer on your LAN and your ISP provides multiple public IP addresses for those computers you must establish a PPP interface for each public IP address 3 If it does not already exist create a DHCP server pool with poolid 0 The pool should include at least one unique private IP address for each computer on your LAN The gateway IP address should be set to the address of the LAN interface which must be in the same subnet see Chapter 4 for instructions 4 Enable DHCP server as described in Setting the DHCP Mode on page 101 5 Click the Services tab to display the NAT Configuration page If the NAT feature is enabled click the Disable radio button 6 Click the Bridging tab to display the Bridging page and then click the ZIPB Enable radio button 7 Click the Bridging Disable radio button Chapter 6 Configuring the System Operating Modes 87 8 Click A page displays briefly to confirm the change and the System Mode page redisplays 9 If you want the changes to be permanent follow the instructions on page
188. splay If you have difficulty in reconnecting to Web Configuration after rebooting or if the device is not providing Internet connectivity as before reboot using the Reboot from Backup Configuration setting to return to the previous settings WARNING If the Ethernet Modem Router provides a Reconfigure button on the back panel in addition to the power on off button do not use it to activate new changes This button resets the device settings to the manufacturer s default values Any custom settings will be lost 49 Part 2 Interfaces and Operating Modes TDM E400 TDM C400Ethernet Modem Router User s Manual 50 About Part 2 Part 2 explains how to configure the Ethernet Modem Router s interfaces to communicate with your LAN PC s and your ISP Part 2 also describes the device s operating modes and explains how to configure the interfaces to enable each mode Definitions Interfaces refers to those points in the various communication paths where the Ethernet Modem Router exchanges data with external devices This document distinguishes between the terms port and interface a port is a hardware based point of entry to or exit from a device Often several software based interfaces can be defined to operate over the same port Operating modes determine which protocols the device can use to communicate with LAN computers and the ISP and which product features are made available to the user Part 2 contains th
189. ss configured on your PCs is also the address assigned to the LAN interface on the Ethernet Modem Router See Chapter 9 for more information TDM E400 TDM C400 ADSL2 Modem Router User s Manual 46 Committing Changes and Rebooting Committing Changes Whenever you use Web Configuration to change system settings the changes are initially placed in temporary storage called random access memory or RAM Your changes are made effective when you submit them but will be lost if the device is reset or turned off You can commit changes to save them permanently to flash memory Definition Submitting changes activates them immediately but saves them only until the device is reset or powered down Committing changes saves them permanently Follow these steps to commit changes 1 Click the Admin tab and then click Commit amp Reboot in the task bar The Commit amp Reboot page displays Figure 13 Commit amp Reboot Page 2 Click Disregard the selection in the Reboot Mode drop down list it does not affect the commit process The changes are saved to permanent storage The previous settings are copied to backup storage so that they can be recalled if your new settings do not work properly see the rebooting instructions on page 47 Chapter 3 Getting Started with Web Configuration 47 Rebooting the device using Web Configuration To reboot the device display the Commit amp Reboot page select the app
190. ssword in the same uppercase and lowercase characters that you use here 4 Click 5 If you want the changes to be permanent follow the instructions on page 46 to commit them TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 164 Enabling Management through the WAN Port You can enable access to Web Configuration via the WAN port so that the ISP can perform configuration tasks To enable WAN access display the Management Control page by clicking Management Control in the Admin tab Figure 70 Management Control Page The table on this page provides a check box to enable or disable HTTP i e Web browser based access to the configuration program through the WAN port In the Inactivity TimeOut text box you can specify a length of time in minutes after which external access will be blocked assuming that there is no access during that time If you want your changes to be in effect the next time you log in click If you want the changes to be permanent follow the instructions on page 46 to commit them Chapter 15 Managing Access to the Configuration Program 165 Configuring SNMP The Simple Network Management Protocol SNMP enables a host computer to access configuration performance and other system data that resides in a database on the modem The host computer is called a management station and the modem is called an SNMP agent The data that can be accessed via SNMP is stored in a Manageme
191. stination but it will know a set of other devices that can help pass the data intelligently If it cannot determine which of these devices provides a good next hop because no such route has been defined then that device will forward the data to its default gateway Eventually a high level device using a predefined IP route will be able to forward the data along a path to its destination Do I need to define IP routes Most users do not need to define IP routes On a typical small home or office LAN the existing routes that set up the default gateways for your LAN computers and for the Ethernet Modem Router provide the most appropriate path for all your Internet traffic On your LAN computers a default gateway directs all Internet traffic to the LAN interface on the Ethernet Modem Router assuming the device is configured in Routing mode Your LAN computers know their default gateway either because you assigned it to them when you modified their TCP IP properties or because you configured them to receive the information dynamically from a server whenever they access the Internet Each of these processes is described in Quick Start Part 2 Configuring Your Computers On the Ethernet Modem Router itself a default gateway is defined to direct all outbound Internet traffic to a router at your ISP This default gateway is assigned automatically by your ISP whenever the device negotiates an Internet connection The process fo
192. t Modem Router User s Manual 56 If you changed the USB interface IP address while working from the USB attached computer then the connection will be terminated If you were using the Ethernet interface a page will display to confirm your change and your connection will remain active 6 If necessary reconfigure your USB PC so that its IP address places it in the same subnet as the new IP address of the USB interface See Quick Start Part 2 Configuring Your Computers for instructions 7 Log into Web Configuration by typing the new USB interface IP address in your Web browser s address location box 8 If you want the changes to be permanent follow the instructions on page 46 to commit them 57 5 Configuring WAN Interfaces The Ethernet Modem Router s WAN side interfaces are used to communication via the DSL port A WAN interface comprises two layers a lower level ATM VC interface and a higher level protocol interface The ATM VC interface enables the device to communicate using the Asynchronous Transfer Mode protocol The ATM protocol provides a common format for transmitting data over a variety of hardware systems that make up the backbone of the Internet The virtual circuit VC properties of the ATM VC interface identify a unique path that your ADSL2 Ethernet Modem Router uses to communicate via the ATM based network with the telephone company central office equipment The higher level protocol int
193. t Protocol When enabled the Ethernet interface collects and consolidates requests from the LAN PCs to receive IGMP messages from external computers The interface also forwards IGMP messages it receives on its WAN interface to the appropriate hosts The WAN interface must also be enabled for the IGMP protocol see the Quick Configuration page and the corresponding instructions on page 33 MTU The Maximum Transmission Unit specifies the size in bytes of the largest Ethernet packet that the interface will accept Packets larger than this size will be dropped 2 Enter an IP address and mask in the fields provided or enable the external or internal DHCP server in the Get LAN Address field Keep these points in mind Manually specifying an address If you are using routing services on you LAN such as DHCP and NAT you must assign a fixed LAN IP address and mask to the interface The IP address must be in the same subnet as your LAN computers that connect to it See Appendix A for an explanation of IP addresses and network masks If you change the LAN IP address you may need to update the DHCP configuration so that the addresses that the DHCP server dynamically assigns to your computers are on the same subnet as the new LAN IP address See Chapter 8 for instructions on changing the pool of dynamically assigned addresses Enabling DHCP If you choose to have the LAN interface be a DHCP client of an internal or external server the LAN Net
194. t at 1000 or above so that they do not interfere with system defined rules It is also recommended that you assign rule IDs in multiples of 5 or 10 e g 1000 1010 1020 so that you leave enough room between them for inserting new rules if necessary Interface The interface on which the rule will take effect Direction Specifies whether the rule should apply to packets that are incoming or outgoing on the selected interface Incoming refers to packets coming in to the LAN on the interface and Outgoing refers to packets going out from the LAN You can use rules that specify the incoming direction to restrict external computers from accessing your LAN In Interface The interface from which packets must be forwarded in order for this rule to be invoked For example if the Interface criteria is set to ppp 0 then the In Interface could be set to usb 0 This specifies that the rule applies only to packets passed from the USB computer through the router s PPP interface This option is valid only for rules defined for the outgoing direction Action Specifies what the rule will do to a packet when the packet matches the rule criteria The action can be Accept forward to destination or Deny discard the packet Do not select the CallMgt option Log Option When Enabled is selected a log entry will be created on the system each time this rule is invoked Logging may be helpful when troubleshooting You can also disable logging log on
195. t the infrastructure level of the Internet such as your ISP Class B networks are smaller but still quite large each able to hold over 65 000 hosts There can be up to 16 384 class B networks in existence A class B network might be appropriate for a large organization such as a business or government agency Class C networks are the smallest only able to hold 254 hosts at most but the total possible number of class C networks exceeds 2 million 2 097 152 to be exact LANs connected to the Internet are usually class C networks Some important notes regarding IP addresses The class can be determined easily from field1 field1 1 126 Class A field1 128 191 Class B field1 192 223 Class C field1 values not shown are reserved for special uses A host ID can have any value except all fields set to 0 or all fields set to 255 as those values are reserved for special uses Subnet masks Definition mask A mask looks like a regular IP address but contains a pattern of bits that tells what parts of an IP address are the network ID and what parts are the host ID bits set to 1 mean this bit is part of the network ID and bits set to 0 mean this bit is part of the host ID Subnet masks are used to define subnets what you get after dividing a network into smaller pieces A subnet s network ID is created by borrowing one or more bits from the host ID portion of the address The subnet mask identifies these host ID bits
196. tect the system against denial of service DoS attacks and other unwelcome or malicious accesses to your LAN You can also specify how to monitor attempted attacks and who should be automatically notified Configuring Global Firewall Settings Follow these instructions to configure global firewall settings 1 Log into Web Configuration click the Services tab and then click Firewall in the task bar The Firewall Configuration page displays Figure 57 Firewall Configuration Page TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 136 2 Configure the following settings as needed Field Description Black List Status If you want the device to maintain a blacklist click the Enable radio button Click the Disable radio button if you do not want to maintain a list For more information see Managing the Blacklist on page 138 Black List Period min Specifies the number of minutes that a computer s IP address will remain on the blacklist i e all traffic originating from that computer will be blocked from passing through any interface on the ADSL Ethernet Modem Router Attack Protection Click the Enable radio button to use the built in firewall protections that prevent the following common types of attacks o IP Spoofing Sending packets over the WAN interface using an internal LAN IP address as the source address o Tear Drop Sending packets that contain overlapping fragments o Smurf and F
197. ther the device s LAN and WAN interfaces are configured with IP information i e are IP enabled and whether the Bridging setting on the System Mode page is enabled or disabled The System Mode page is located in the Home tab and is shown in Figure 31 on page 80 When the Bridging setting on the System Mode page is disabled then the system mode will display as Routing When the Bridging setting is enabled and at least one LAN or WAN interface is IP enabled then the system mode will display as Routing and Bridging When the Bridging setting is enabled and no interfaces are IP enabled then the device is considered to be in Bridging Mode Note however that in this case you would not be able to access Web Configuration without being IP enabled the Ethernet interface could not communicate using the Internet protocol HTTP which is used to display information in your Web browser Instead of focusing on selecting a system mode of operation users should ensure that the appropriate settings are in place to enable communication with the ISP and to provide the required LAN services The correct operating mode will be selected automatically when these settings are properly configured The following sections describe how to configure IP enabled and bridge enabled interfaces and how to enable disable the Bridging setting Several common configurations are described on pages 81 83 TDM E400 Chapter 6 Configuring the System
198. thernet Modem Router automatically assigns all required Internet settings to your PCs You need only to configure the PCs to accept the information when it is assigned Note In some cases you may want to assign Internet information manually to some or all of your computers rather than allow the Ethernet Modem Router to do so See Assigning static Internet information to your PCs on page 27 for instructions If you have connected your PC via the USB port see the USB configuration instructions on page 28 If you have connected your PC s or LAN via Ethernet to the Ethernet Modem Router follow the instructions that correspond to the operating systems installed on your PCs Windows XP PCs 1 In the Windows task bar click and then click Control Panel 2 Double click the Network Connections icon 3 In the LAN or High Speed Internet window right click on the icon corresponding to your network interface card NIC and select Properties Often this icon is labeled Local Area Connection The Local Area Connection dialog box displays with a list of currently installed network items 4 Ensure that the check box to the left of the item labeled Internet Protocol TCP IP is checked and click 5 In the Internet Protocol TCP IP Properties dialog box click the radio button labeled Obtain an IP address automatically Also click the radio button labeled Obtain DNS server address automatically 6 Click twice to c
199. time out whenever the interface is idle for a specified amount of time Service Name This feature is available with PPPoE interfaces but not with PPPoA interfaces The name of the ISP service you are using with this PPP connection ISPs may offer different types of services for example for online gaming or business services each requiring a different login and other connection properties Chapter 5 Configuring the WAN Interfaces 65 Field Description Last Fail Cause Indicates the action that ended the previous PPP session o No Valid PADO Recvd The device initiated a PPoE handshake but did not receive a packet in reply from the ISP o No Valid PADS Recvd After the initial handshake the device did not receive a confirmation packet from the ISP o Stopped by User The user stopped the connection for example by changing the Web Configuration settings for the PPP interface o No Activity The PPP communication timed out in accordance with the timeout period specified on the PPP Configuration page o Auth Failure The ISP could not authorize the connection based on the user name and or password provided o PADT Recvd The ISP issued a special packet type to terminate the PPP connection o VC down The Virtual Circuit between the device and the ISP is down o Internal failure A system software failure occurred DNS The IP address of the DNS server located with your ISP used on this PPP connection SDNS Th
200. to return to the ATM VC Configuration page The new interface should now display in the ATM VC Configuration table 7 If you want the changes to be permanent follow the instructions on page 46 to commit them You may need to create a new WAN interface or modify an existing interface so that it uses the new VC See the instructions for configuring a PPP page 61 EoA page 67 or IPoA page 71 interface depending on the type you use to communicate with your ISP Chapter 5 Configuring the WAN Interfaces 61 Configuring PPP Interfaces The Point to Point Protocol PPP is one of several protocols used to enable communication between ISPs and their customers PPP handles tasks such as the following Identify the type of service the ISP should provide to a given customer Identify the customer to the ISP through a username and password login Enable the ISP to assign an Internet address and other IP information to the customer s DSL modem PPP can be used only when your connection with your ISP is a routed connection i e it cannot be used for bridged connections For more information on bridged and routed connections see Chapter 6 Configuring the System Operating Mode A PPP interface can be either of two types PPP over ATM PPPoA and PPP over Ethernet PPPoE Although to the end user they function similarly the ISP s network may be configured to handle only one protocol type Furthermore an ISP may not use t
201. ts on the ppp 0 interface from any incoming interface this would include the eth 0 and usb 0 interfaces for example 2 Specify the source IP address of the computer you want to block 3 Specify the Protocol as TCP and enable the Store State setting 4 Specify the destination port as 80 which is the well known port number for web servers 5 Enable the rule by clicking the radio button at the top of the page 6 Click to create the rule 7 On the IP Filter Configuration page set the Security Level to the same level you chose for the rule and set both the Private Default Action and the Public Default Action to Accept 8 Click 9 and commit your changes With this configuration the specified computer will not be able to access the Web but will be able to access FTP Internet sites and any others that use destination port numbers other than 80 TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 148 Example 2 Blocking Telnet accesses to the Ethernet Modem Router 1 Add a new rule for packets incoming on the ppp 0 interface 2 Specify that the packet must contain the TCP protocol and must be destined for port 23 the well known port number used for the Telnet protocol 3 Enable the rule by clicking the radio button at the top of the page 4 Click to create the rule and commit your changes Viewing IP Filter Statistics For each rule you can view statistics on how many pa
202. u can connect it directly to the device s USB port Only one computer can be connected in this manner You can also use the USB and Ethernet ports simultaneously connecting your LAN via the Ethernet port and a standalone PC to the USB port Note LAN and USB interfaces are pre configured and cannot be created using Web Configuration However you can modify the properties of an existing interface If you require a LAN or USB interface that was not pre configured contact your ISP for assistance TDM E400 TDM C400 Ethernet Modem Router User s Manual 52 Configuring the LAN Ethernet Interface In order to use the device as a router on your LAN Internet Protocol IP properties must be assigned to the LAN interface These properties must identify the interface as residing in the same subnet as the PCs on your LAN See Appendix A for an explanation of subnets Default IP properties are assigned to the LAN interface to enable you to connect to it when you configure your PCs as described in the Quick Start Note If the IP addresses that you want to assign to your PCs are not in the same subnet as the default LAN interface you can use Web Configuration to change the LAN interface IP properties accordingly However because you must access Web Configuration from a PC in the same subnet as the LAN interface initially configure one PC as indicated in the Quick Start Then access Web Configuration and change the LAN IP address as
203. ual 144 Field Description Black List Status Specifies whether or not a violation of this rule will result in the offending computer s IP address being added to the blacklist which blocks the ADSL ADSL2 Ethernet Modem Router from forwarding packets from that source for a specified period of time See Chapter 13 Configuring Firewall Settings for instructions Log Tag A description of up to 16 characters to be recorded in the log in the event that a packet violates this rule Be sure to set the Log Option to Enable if you configure a Log Tag Start End Time The time range during which this rule is to be in effect specified in military units Src IP Address Dest IP Address IP address criteria for the source computer s from which the packet originates and the destination computer In the drop down list you can configure the rule to be invoked on packets containing any any source IP address lt any source IP address that is numerically less than the specified address lteq any source IP address that is numerically less than or equal to the specified address gt any source IP address that is numerically greater than the specified address eq any source IP address that is numerically equal to the specified address neq any source IP address that is not equal to the specified address range any source IP address that is within the specified range including its endpoints out of range any source IP address th
204. up requests it receives from the LAN PCs to a DNS server at the ISP It then relays the DNS server s response to the PC When performing DNS relay the Ethernet Modem Router must maintain the IP addresses of the DNS servers it contacts It can learn these addresses in either or both of the following ways Learned through PPP If the device uses a PPP connection to the ISP the primary and secondary DNS addresses can be learned via the PPP protocol To use this method the Use DNS checkbox must be selected in the PPP interface properties See Configuring PPP Interfaces on page 61 for related instructions Note that you cannot change this property by modifying an existing PPP interface you must delete the interface and recreate it with the new setting Using this option is advantageous in that you will not need to reconfigure the PCs or the ADSL2 Ethernet Modem Router if the ISP changes their DNS addresses Configured on the ADSL Ethernet Modem Router You can use the device s DNS feature to specify the ISP s DNS addresses If the device also uses a PPP interface with the Use DNS property enabled then these configured addresses can be used in addition to the two addresses learned through PPP If Use DNS is not enabled or if a protocol other than PPP is used such as EoA then these configured addresses will be used as the primary and secondary DNS addresses Follow these steps to configure DNS relay 1 Configure the LAN P
205. uration click the Services tab and then click IP Filter in the task bar The IP Filter Confirmation page displays Figure 59 IP Filter Confirmation Page The IP Filter Configuration page displays global settings that you can modify and the IP filter rule table which shows all currently established rules See Creating IP Filter Rules on page 142 for a description of the items that make up a rule When rules are defined you can use the icons that display in the Actions column to edit delete and view details on the corresponding rule Chapter 14 Configuring Filters and Blocking Protocols 141 Configuring IP Filter Global Settings The IP Filter Configuration page enables you to configure the following global IP filter settings Security Level This setting determines which IP filter rules take effect based on the security level specified in each rule For example when High is selected only those rules that are assigned a security value of High will be in effect The same is true for the Medium and Low settings When None is selected IP filtering is disabled Private Public DMZ Default Action This setting specifies a default action to be taken Accept or Deny on private public or DMZ type device interfaces when they receive packets that do not match any of the filtering rules You can specify a different default action for each interface type You specify an interface s type when you create the interface
206. user or by an administrator or an automated mechanism called DHCP Within a group of networked computers a router can associate each PC s assigned IP address with its MAC address When a PC initiates communication through the router outside the network the router sends out IP packets to the Internet on behalf of the PC revealing only the PC s IP address As IP packets are received in response the router reconciles the IP address with the PCs MAC address and sends Ethernet MAC layer packets on the network for the PC to claim Because they use a standardized higher layer protocol for inter network communication routers can connect two or more networks even when their underlying MAC layer protocols differ Routers are considered more intelligent and flexible devices than bridges and often provide a variety of security and network administration services based on the IP protocols For a more detailed description of how routers pass data see Chapter 10 TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 78 Overview of System Operating Modes The Ethernet Modem Router can operate in Bridging mode Routing mode or Routing and Bridging mode You can view the currently configured mode in the System View table on the Home page as shown in Figure 29 Figure 29 Viewing the Operating Mode The system mode that displays is not configured using a single setting Rather it is determined at system startup based on whe
207. uses two forms of PPP called PPPoA and PPPoE See also PPPoA PPPoE PPPoA Point to Point Protocol over ATM One of the two types of PPP interfaces you can define for a Virtual Circuit VC the other type being PPPoE You can define only one PPPoA interface per VC PPPoE Point to Point Protocol over Ethernet One of the two types of PPP interfaces you can define for a Virtual Circuit VC the other type being PPPoA You can define one or more PPPoE interfaces per VC protocol A set of rules governing the transmission of data In order for a data transmission to work both ends of the connection have to follow the rules of the protocol RADIUS Remote Authentication Dial In User Service A protocol used to authenticate users dialing in or otherwise connecting to a network RADIUS specifies the series of requests challenges and response messages required before a device can gain access to a network RIP Routing Information Protocol The original TCP IP routing protocol There are two versions of RIP version I and version II Appendix C Glossary 195 RJ 11 Registered Jack Standard 11 The standard plug used to connect telephones fax machines modems etc to a telephone jack It is a 6 pin connector usually containing four wires RJ 45 Registered Jack Standard 45 The 8 pin plug used in transmitting data over phone lines Ethernet cabling usually uses this type of connector routing Forwarding data between your network an
208. w the instructions on page 46 to commit them Enabling or disabling BRAS takes effect immediately i e a system reboot is not required TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 86 Configuring ZIPB Mode The Ethernet Modem Router offers a special type of bridging mode called ZIPB Zero Installation PPP Bridge mode This mode enables the ISP to simplify the installation process for customers who will be using the device as a bridge ZIPB mode also allows customers to use the embedded firewall features which are normally not available on bridged connections Note Contact your ISP to determine if they offer this connection type before you configure it With ordinary DSL modems that use a bridged connection to the ISP the customer must install a program on their PC called a PPP client This program enables the customer to log in to the ISP s access server and acquire IP information that the computer needs for all subsequent Internet communication In ZIPB mode the Ethernet Modem Router uses its own PPP software to communicate at startup with the ISP The ISP assigns the IP information to the device s PPP interface which then uses its DHCP server to pass the information on to the user s PC Therefore the PPP interface and the user s PC both use the same IP address Working with your ISP follow this procedure to enable ZIPB mode 1 Ensure that your PCs are configured to accept IP information as
209. will be routed Chapter 5 PPP Settings PPP User Name and Password The user name and password you use to log in to your ISP Note this is not the same as the user name and password you used to log in to Web Configuration Chapter 5 Use DNS Specifies whether the DNS server addresses that your LAN will use should be supplied dynamically each time you connect to the ISP If you click Disable you must configure DNS addresses manually on each PC or on the fields below Chapter 5 DNS Settings Primary Secondary DNS Server Specifies the primary and secondary domain name system DNS server addresses provided by your ISP Chapter 9 Chapter 2 Quick Start 35 When finished customizing these settings click The settings are now in effect however if you reboot or if the power is disconnected your settings will be lost In step 3 you save the changes to permanent memory 2 Click the Admin tab and then click Commit amp Reboot in the task bar 3 Click A page will display briefly to confirm your changes and then you will be returned to the Commit amp Reboot page You are now finished customizing basic settings Read the following section to determine if you need to change additional settings Note On the Quick Configuration page you can click to remove all existing Quick Configuration settings and return to the default values Default Router Settings The Ethernet Modem Router can p
210. within the specified range including its endpoints o any all packets of any type will match this subrule This selection makes irrelevant any other criteria in the subrule WARNING The comparison type any should only be used when all packets of any type are to be accepted or denied This selection combined with a rule type that denies matching packets may disable your access to the Web interface Lower Value Higher Value The reference values in hexadecimal to which the selected bits will be compared If range is selected as the comparison type enter values in both fields otherwise enter a value only in the Lower Value field 7 When you are finished entering criteria and are ready to make this subrule effective you can click the Enable radio button at the top of the Bridge Filter Subrule Add page and then click You could also leave it disabled and edit the subrule to enable it later A page displays to confirm your changes 8 Click to return to the Bridge Filter Configuration Page The subrule should now display in the table beneath the general rule it was added to Next if you have not already done so you can enable the rule any of its subrules and the bridge filtering service in order to make the rule effective On the Bridge Filter Configuration page a red ball displays in the Oper Status column of the table for rules and subrules that are disabled and a green ball displays for rules that are enabl
211. work Mask field will be dimmed and made unavailable for entry The LAN IP Address field will remain editable however The address that you specify here will be used as a request to the DHCP server This is referred to as a Configured IP Address in Web Configuration The configured IP address is requested during communication with the DHCP server If the configured IP address is not available then system will accept another address from the server Even if another number is assigned the same configured IP address will continue to display in this field 3 If you are using IGMP on your network click the IGMP Enable radio button see the explanation of IGMP on page 54 4 Click Chapter 4 Configuring the LAN and USB Interfaces 55 If you changed the LAN IP address while working from a PC that is connected to the device via Ethernet then your connection will be terminated If you changed the LAN IP address while working from a PC connected to the device via USB a page will display to confirm your change and your connection will remain active If you enabled the DHCP service the ADSL ADSL2 Ethernet Modem Router will initiate a request for an IP address from your LAN s DHCP server If a different IP address is assigned than was previously configured your current connection will be terminated 5 Reconfigure your PCs if necessary so that their IP addresses place them in the same subnet as the new IP address of the LAN interface
212. working protocol used on Novell Netware based LANs BPDU Bridge Protocol Data Unit BPDUs are data messages that are exchanged across the switches between LANs that are connected by a bridge BPDU packets contain information on ports addresses priorities and costs and are exchanged across bridges to detect and eliminate loops in a network ARP Address Resolution Protocol Computers on a LAN use ARP to learn the hardware addresses i e MAC addresses of other computers when they know only their IP addresses IPV6 Multicast IP Multicasting under IP Protocol version 6 See IP Multicast above 802 1 Q This IEEE specification defines a protocol for virtual LANs on Ethernet networks A virtual LAN is a group of PCs that function as a local area network even though the PCs may not be physically connected They are commonly used to facilitate administration of large networks To block a protocol click the appropriate check box and click After you have verified that the device continues to function as expected if you want the changes to be permanent follow the instructions on page 46 to commit them 159 Part 5 Administrative Tasks and System Monitoring TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 160 About Part 5 Part 5 describes tools that LAN administrator can use to monitor the system performance and control access to the Web Configuration program Part 5 contains the following
213. y selected Each PC s IP properties specify the ADSL Ethernet Modem Router s LAN interface as its gateway IP address The PCs may also be configured to obtain IP information automatically from a DHCP server With this configuration all IP packets originating from your LAN and destined for the Internet will be routed to the PCs default gateway the LAN interface then to the Ethernet Modem Router s default gateway the WAN interface and then to the WAN interface s gateway the ISP s access server In the System View page in the Home tab the Mode field will reflect Routing With no bridging services enabled non IP packets will be ignored TDM E400 TDM C400 ADSL2 Ethernet Modem Router User s Manual 82 Scenario 2 Bridged Connection to ISP In this configuration your ISP requires you to configure a bridged Internet connection For a bridged internet connection the WAN interface must be bridge enabled The configuration would have these features A bridge enabled EoA WAN interface Bridged IP connections must use an EoA type WAN interface An IP address may or may not be specified for the interface Note that even when the device communicates with your ISP as a bridge its Ethernet interface must remain IP enabled to allow you access to the Web Configuration program through your Web browser The Ethernet Modem Router can also continue to provide certain IP based services to your LAN such as DHCP server and DNS relay
214. you are using a computer as a public web server You maintain different subnets on your LAN subnets are described in Appendix A Before you begin be sure to have the following information on hand Contact your ISP if necessary The IP address and subnet mask to be assigned to each PC The IP address of the default gateway for your LAN In most cases this is the address assigned to the LAN interface on the Ethernet Modem Router By default the LAN interface is assigned this IP address 192 168 1 254 You can change this number or another number can be assigned by your ISP See Chapter 4 for more information The IP address of your ISP s Domain Name System DNS server On each PC follow the instructions on pages 22 through 26 relating only to checking for and or installing the IP protocol Once it is installed continue to follow the instructions for displaying Internet Protocol TCP IP properties Instead of enabling dynamic assignment of the IP addresses for the computer DNS server and default gateway click the radio buttons that enable you to enter the information manually Note Your PCs must have IP addresses that place them in the same subnet as the Ethernet Modem Router s LAN interface If the IP addresses you manually assign to your LAN PCs are in a different subnet than the LAN interface follow the instructions in Chapter 4 to change the LAN interface IP address as needed TDM E400 TDM C400 ADSL2 Modem Route
215. you may encounter in installing or using the Ethernet Modem Router and provides instructions for using several IP utilities to diagnose problems Contact Customer Support if these suggestions do not resolve the problem Problem Troubleshooting Suggestion LEDs POWER LED does not illuminate after product is turned on Verify that you are using the power cable provided with the device and that it is securely connected to the Ethernet Modem Router and a wall socket power strip INTERNET LED does not illuminate after phone cable is attached Verify that a standard telephone cable called an RJ 11 cable like the one provided is securely connected to the ADSL port and your wall phone jack Allow about 30 seconds for the device to negotiate a connection with your ISP Ethernet LED does not illuminate after Ethernet cable is attached Verify that the Ethernet cable is securely connected to your LAN hub or PC and to the Ethernet Modem Router Make sure the PC and or hub is turned on Verify that you are using a straight through type Ethernet cable to the uplink port on a hub or a cross over type cable to a stand alone PC If you connected the device to an ordinary hub port not Uplink you must use a straight through cable To check hold the connectors at each end of the cable side by side with the plastic spring facing down Looking at the wires from left to right if the first second third and sixth wires are the same

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