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1. Port Mapping Services EERDE VPN Certificates Content Filtering Manage Schedules Edit new schedule Name Network Security Firewall Servers Tools Status Help DFL 700 Active from 111x Jan x 200517 Hour Tl Active to 12 7 Jan z 200517 Hour 06 00 12 00 vo MMMM u MMMM we MMMM Tk MMMM e MMMM ss MM MMMM sx MMMM a Defined schedules Name Start St Add new lop DayTime 2005 01 0100 2007 01 1214 Edit 14L inclusive 18 00 Al MMM M MM M M M M M MMMM MMMM M M MN MMM M MIM M MM M 191 MM M M MM M M M M M MMM M MM MMM M M MIMI MI MI MIM M M M 1 9 MMM M MM MMM M 191 O 0O Apply Cancel Help access the Internet during work hours Therefore one may create a schedule to allow the firewall to allow traffic Monday Friday 8AM 5PM only During the non work hours the firewall will not allow Internet access Add new recurring schedule Follow these steps to add a new recurring schedule Step 1 Go to Firewall and Schedules and choose Add new Step 2 Enable the checkbox named Recurring scheduling Step 3 Use the checkboxes to set the times this schedule should be active Click the Apply button below to apply the changes or click Cancel to discard changes Add new one time schedule Follow these steps to create and add a new one time schedule Step 1 Go to Firewall and Schedules and choose Add new Step 2 Choose the star
2. DFL 700 Network Security Power Firewall Power A solid light indicates a proper connection to the power supply Status A System status indicator that flashes occasionally to indicate a functional active system Solid illumination of the Status LED indicates a hardware software critical failure WAN LAN amp DMZ Bright Green illumination indicates a valid Ethernet Link on that respective port Each LED will flicker when that respective port is sending or receiving data Physical Connections COM Port Serial Read Only access to the firewall software from a PC equipped with a Serial COM port 9600 baud 8 data bits No Parity 1 Stop bit No Flow Control LAN Port Use this port to connect to a Fast Ethernet Switch to service more than 1 client PC on the internal office network DMZ Port Use this port to service an additional physically segmented Private or Transparent Network to be occupied by WAN accessible servers FTP HTTP DNS WAN Port Use this port to connect to an external network such as a WAN or a modem provided by an ISP Reset Use this switch to reset the DFL 700 to factory default settings Refer to page 67 for further instructions DC Power Use the included 5VDC 3A switching power supply to connect to an 110 120VAC electrical receptacle Do not use less than 5VDC 3A to power the device doing so will damage the unit Package Contents Contents of Package e D Link DFL 700 Firewa
3. DHCP Server Okbps 24 his ago Receive rate Current amount of traffic received through the interface Receive r ate over the past 24 hours 5000 kbps 2500 kbps 0 kbps 24 his ago There are also two graphs displaying the send and receive rate through the interfaces during the last 24 hours 72 VPN Click on Status in the menu bar and then click Interfaces below it A window will appear providing information about the VPN connections on the DFL 700 By default information about the first VPN tunnel will be displayed To see another one click on that VPN tunnels name The two graphs display the send and receive rate through the selected VPN tunnel during the last 24 hours In this example a tunnel named system RoamingUsers is selected This is a menaces tunnel that allows roaming users So under the IPSec SA listing each roaming user connected to this DHCP Server tunnel is shown D Link Building Networks for People DFL 700 Network Security Firewall System Firewall Servers Tools VPN Status VPN Tunnels vpntunnell vpntunnel RoamingUsers Send rate over the past 24 hours 500 kbps 250 kbps O kbps 24 his ago Connections Receive rate over the past 24 hours 200 kbps EME EE Y 100 kbps O kbps 24 hrs ago now Help IPsec SAs for VPN tunnel RoamingUsers ist IKE SAs
4. password supplied to you by your ISP e Service Name When using PPPoE some ISPs require you to fill in a Service Name e Primary and Secondary DNS Server The IP addresses of your DNS servers these are optional and are often provided by the PPPoE service WAN Interface Settings PPTP over Ethernet connections are used in some DSL and cable modem networks You need to enter your account details and possibly also IP configuration parameters of the actual physical interface that the PPTP tunnel runs over Your ISP should supply this information Username The login or username supplied to you by your ISP e Password _ The password supplied to you by your ISP e PPTP Server IP The IP of the PPTP server that the DFL 700 will connect to Before PPTP can be used to connect to your ISP the physical WAN interface parameters must be input You can use either DHCP or Static IP depending on the type of Using PPTP Interface Settings Edit settings of the WAN interface Change WAN Type PPTP PPTP over Ethernet connections are used in some DSL and cable modem networks You need account details and possibly also IP configuration parameters of the actual physical interface that the PPTP tunnel runs over Your ISP should supply this information PPTP tunnel parameters Username O_O Password CL RetypePasswod OOS S S S S PPTPSeverlP SS Physical interface parameters DHCP au
5. protocol Require IPSec encryption If configuring for L2TP you most likely will be using IPSec instead of MPPE for data encryption To use IPSec enable the checkbox and select PSK or Certificate Authentication protocol T No authentication M pap M CHap v MSCHAP MPPE encryption possible M MSCHAPV2 MPPE encryption possible MPPE encryption I None unencrypted 40bit 56 bit 128 bit best security n is only possible when using MSCHAP or MSCHAPv2 as authentication m Require IPsec encryption PSK Pre Shared Key Key Retype key Certificate based Local Identity Admin CN 000F3D10FC27 Certificates a Use ctrl shift click to select mu To use ID lists bel mu selec ri ce Identity List inoia 5 52 IPSec VPN between two networks In the following example users on the main Branch Office office internal network can connect to the branch office internal network and vice versa Communication between the two networks takes place in an encrypted IPSec VPN tunnel that connects the two DFL 700 NetDefend DFL 700 Firewall Firewalls across the Internet Users on the internal networks are not aware that when they connect to a computer on the other network that the connection runs across the Internet Internal Network As shown in the example you can use the DFL 700 to protect a branch office and a small main office Both of these DFL 700s can be configured as IPSec VPN gatew
6. Gateway Local Net Remote Net 172 16 07 192 168 1 0 24 172 16 07 Close 172 16 0 11 192 168 1 0 24 172 16 0 11 Close 172 16 0 15 192 168 1 0 24 172 16 0 15 Close 172 17 0 23 192 168 1 0 24 172 17 0 23 Close Connections Click on Status in the menu bar and then click Connections below it A window will appear providing information about the D Li nk content of the state table Building Networks for People DFL 700 Network Security Firewall The state table shows the last 100 connections x opened through the System Firewall Servers firewall Connections are created when traffic is Filter state table display a permitted to pass via the Source Destination State Table Contents policies IP Address Interface Any a Ary Each connection has IP Protocol ary E two timeout values one Pott C i in each direction These O are updated when the tact Wels firewall receives packets DHCP Server from each end of the State table contents max 100 entries State Proto Source Destination Timeout connection The value TCP_CLOSE TCP lan 192 168 1 5 1024 war 172 16 77 88 80 8 shown in the Timeout TCP_OPEN TCP lan 192 168 1 5 1025 war 172 16 77 88 80 299998 column is the lower of the two values Possible values in the State column include TCP_CLOSE TCP_OPEN SYN_RECV FIN_RECV and so on The Proto column can have TCP The connection is a TCP connection PING The connection is an ICMP ECHO c
7. Select the interface user you wish to edit from the below list Note that both the user settings and the interface settings limit what a user can do so if a user with both admin and read only rights logs on from a somewhere where only read only access is allowed the user will be allowed to log on but will receive read only access only Administrative access via LAN interface Edit Ping Any address Admin Any address HTTPS only Read only Any address HTTPS only SNMP Any address Read Community public Administrative access via WAN interface Edit Ping Any address Admin Any address HTTPS only Administrative access via IPSec_tunnel vpn tunnel Edit Ping Any address Admin Any address HTTPS only Add administrative access via Interface DMZ YPN Tunnel Management UI Ports The ports for the DFL 700 s Web Server Management UI HTTP and HTTPS can be customized if so desired These values must change if User Authentication is enabled User Authentication uses 80 and 443 to accomplish user login Ping If enabled it specifies who can ping the IP interface of the DFL 700 Enabling Default allows anyone to ping the interface IP Admin If enabled it allows all users with admin access to connect to the DFL 700 and change configuration this can be HTTPS or HTTP and HTTPS Read Only If enabled it allows all users with read only access to connect to the DFL 700 and look at the configuration this
8. administrators that already exists Change password Step 3 Specify the password for Password the new user Retype password Click the Apply button below to apply the setting or click Cancel to discard changes Note The user name and password should be at least six characters long The user name and password can contain numbers 0 9 and upper and lower case letters A Z a z Special characters and spaces are not allowed 36 Change Administrative User Access level To change the access lever of a user click on the user name and you will see the following screen From here you can change the access level by entering the appropriate level in the Group Membership field Access levels e Administrator the user can add edit and remove rules and change all settings User Management Edit user admin User name admin Group membership administrators Change password Password Retype password L2TP PPTP settings e Read only the user can only look at the configuration of the firewall e No Admin Access The user is only used for user authentication Static client IP If empty the IP addre Networks behind user ill be taken from the server s IP pool Delete user Membership in the administrators group means that the user can administer this unit Membership in the auditors group means that the user has read only access to this unit O O OQ
9. Custom TCP UDP This service uses both the TCP and UDP protocols The following is used when making a custom service Custom source destination ports For many services a single destination port is sufficient The source port used most often are all ports 0 65535 The http service for instance uses destination port 80 A port range can also be used meaning that a range 137 139 covers ports 137 138 and 139 Multiple ranges or individual ports may also be entered separated by commas For instance a service can be defined as having source ports 1024 65535 and destination ports 80 82 90 92 and 95 In this case a TCP or UDP packet with the destination port being one of 80 81 82 90 91 92 or 95 and the source port being in the range 1024 65535 will match this service Schedule If a schedule should be used for the policy choose one from the dropdown menu These are specified on the Schedules page If the policy should always be active choose Always from the dropdown menu Intrusion Detection Prevention The DFL 700 Intrusion Detection Prevention System IDS IDP is a real time intrusion detection and prevention sensor that identifies and takes action against a wide variety of suspicious network activity The IDS uses intrusion signatures stored in the attack database to identify the most common attacks In response to an attack the IDS will protect the networks behind the DFL 700 by dropping the traffic To notify responsi
10. VPN VPN gt internal and VPN gt VPN Firewall Policy Edit global policy parameters Fragments Cl Drop all fragmented packets Minimum TTL 3 YPN N Allow all YPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 4 Click Activate and wait for the firewall to restart 92 Settings for Main office 1 Setup interfaces System gt Interfaces WAN IP 194 0 2 20 LAN IP 192 168 1 1 Subnet mask 255 255 255 0 2 Setup L2TP server Firewall gt VPN Under L2TP PPTP Server click Add new L2TP server Name the server I2tpServer L2TP PPTP Servers Add L2TP tunnel Name 2tpServer Outer IP Blank WAN IP Must be WAN IP if IPsec encryption is required Inner IP Blank LAN IP IP Pool and settings Client IP Pool 192 168 1 100 192 168 1 199 N Proxy ARP dynamically added routes Primary DNS Optional Secondary DNS Optional N Use unit s own DNS relayer addresses Primary WINS Optional caret Optional Leave Outer IP and Inner IP blank Set client IP pool to 192 168 1 100 192 168 1 199 Check Proxy ARP dynamically added routes Check Use unit s own DNS relayer addresses Leave WINS settings blank Authentication Protocol 7 No auth C PAP C CHAP C MSCHAP MPPE encryption possible MSCHAPv2 MMPE encryption possible Under authentication MSCHAPv2 should be the only checked option Under MPPE encryption None should be the
11. gt WAN policy 4 rules NAT enabled Custom policy LAN v gt toMainOffice Show 3 Click Add new to create the first rule 4 Setup the new rule Name the new rule allow_pop3 Select action Allow Select service pop3 Select schedule Always Firewall Policy Show policy LAN gt WAN LAN gt DMZ WAN gt DM2Z WAN gt LAN DMZ gt LAN DMZ gt WAN Show custom policy LAN vi gt toMainOffice Show Edit new rule Name allow_pop3 Position Moves before given position Blank last Action Allow Ly Source Nets Users Groups Any Any authenticated Destination Nets Users Groups Any Any authenticated Leave source and or destination blank to match everything Service pop3 bd Custom source ports Blank any port destination ports Schedule Always v We don t want any Intrusion detection for now so leave this option unchecked Click Apply 98 5 The first policy rule is now created Repeat step 4 to create services named allow_imap allow_ftp and allow_http The services for these policies should be imap ftp_passthrough and http respectively The policy list for LAN gt toMainOffice should now look like this LAN gt toMainDffice Policy Name Action Source Destination Service Move 1 allow_pop3 Allow Any Any pop3 Edt 2 allow_imap Allow Any Any imap BY Edit Q 3 allow_ftp Allow Any Any ftp passthrough RS Edi o 4 allow_http Allow
12. 15 Interface S anioien aia iota dee tes ete aR aa 15 Change IP of the LAN or DMZ interface ce cceeeeeeeeeeeeeeeeeeeeneeeeeeenaees 15 WAN Interface Settings Using Static IP oo ee eeeeeeeeeetteeeeeeeteeeeeeaes 16 WAN Interface Settings Using DHCP eeeeeeeeenneeeeeenneeeeeeteeeeeenes 16 WAN Interface Settings Using PPPOE cesceceeseeeeeeeeteeeeeenteeeeeenas 17 WAN Interface Settings Using PPTP ececceeeeeeeeeeeetteeeeettteeeeeenaees 18 WAN Interface Settings Using L2TP 0 ee eecceeeeeeeeeeeeetteeeeeetteeeeeenaees 19 WAN Interface Settings Using BigPOnd cccceeeteeeeeeeeteeeeeetteeeeeeaes 20 Trame SNe Pug oseni a eed de E hd dente ties 20 MTU Configurations ssena E R R 21 EOIN E A A A duleneaalatbaatnncaartedneendead 22 Add a new Static Routes ii iseiecdeealdl nel del EARE 23 Removera Static Route isicceiiiseieiviete isle idle AEE AANE 23 Logging Beer eer eee nee eee eee ee ere eee ere err ee 24 Enable Logging iiveissecvisieeteedia iene elena ads 25 Enable Audit LOGGING esccaine EEES 25 Enable E mail alerting for IDS IDP events 0 02 eee eeeeeeeeetnteeeeeenteeeeees 25 MMe uenee cites tease thar tetera nit carents execu sl coca tate etemietieteneeiannavensveitente 26 Changing Ume ZONC ies ic acest eect tinea cdma Geto EEAS AAS 27 Using NTP to Syn time escroa EEKEREN 27 Setting time and date MaNually ee eee eects eeeeeeeeeeseeeeeeeeeeaeeeeeenaees 27 PO TE
13. 194 0 2 20 LAN IP 192 168 1 1 Subnet mask 255 255 255 0 2 Setup IPSec tunnel Firewall gt VPN Under IPSec tunnels click add new Name the tunnel ToBranchOffice Local net 192 168 1 0 24 Add IPsec tunnel Name toBranchOffice Local Net 192 168 1 0 24 Authentication PSK Pre Shared Key PS K MEE R etype PS K KARKKI PSK 1234567890 Note You should use a key that is hard to guess Retype PSK 1234567890 Select Tunnel type LAN to LAN tunnel LAN to LAN tunnel Remote Net 192 168 4 0 24 Remote Gateway 194 0 2 10 The gateway can be a numerical IP address DNS name or range of IP addresses for roaming NAT ed gateways Route N Automatically add a route for the remote network Proxy ARP Publish remote network on all interfaces via Proxy ARP C Pass username and password to peer via IKE Auth if the remote gateway IKE Auth client ae requires it Auth Username gt 4uth Password Remote Net 192 168 4 0 24 Remote Gateway 194 0 2 10 Enable Automatically add a route for the remote network Click Apply 82 3 Setup policies for the new tunnel Firewall gt Policy Click Global policy parameters Enable Allow all VPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 4 Click Activate and wait for the firewall to restart This example will allow all traffic between the two offices To get a more secure solution read the A mor
14. Any Any http t ext fE Add new S 5 If no rule matches the connection will be denied and logged 6 Click Activate and wait for the firewall to restart Settings for Main office 1 Setup policies for the new tunnel Firewall gt Policy Click Global policy parameters Disable Allow all VPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 2 Now it is possible to create policies for the VPN interfaces Select from toBranchOffice to LAN and click Show e LAN gt DMZ policy 3 rules DM2Z gt L4N policy 0 rules e WAN gt DMZ policy 0 rules e DM2Z gt WAN policy 4 rules NAT enabled Custom policy toBranchOffice L gt LAN v Show 3 Create the same 4 policy rules that were created on the branch office firewall allow_pop3 allow_imap allow_ftp and allow_http 4 Click Activate and wait for the firewall to restart 100 Windows XP client and PPTP server Main office VPN Client Settings for the Windows XP client 1 Open the control panel Start button gt Control panel 2 If you are using the Category view click on the Network and Internet Connections icon Then click Create a connection to Ww the network on your workplace and o continue to step 6 eid If you are using the Classic view click on the Network Connections icon Connections 3 Under Network task click Create a new Network Tasks connection Create a new connection 4 The New conne
15. Apply Cancel Help Follow these steps to change Administrative User Access level Step 1 Click on the user you would like to change level of Step 2 Choose the appropriate level by entering into the Group Membership Field Click the Apply button below to apply the setting or click Cancel to discard changes Change Administrative User Password To change the password of a user click on the user name and you will see the following screen Follow these steps to Administrative User password change Step 1 Click on the user you would like to change level of Step 2 Enable the Change password checkbox Step 3 Enter the new password twice User Management Edit user admin User name admin Group membership administrators Change password Password Retype password Click the Apply button below to apply the setting or click Cancel to discard changes Note The password should be at least six characters long The password can contain numbers 0 9 and upper and lower case letters A Z a z Special characters and spaces are not allowed Delete Administrative User To delete a user click on the user name and you will see the following screen Follow these steps to delete an Administrative User Step 1 Click on the user you would like to delete Step 2 Enable the Delete user checkbox Click the Apply button below to apply the setting or click Cancel to discard changes User
16. Configuration maximum size of packets sent via this interface Normally you do not need to change the MTU settings By default the interface uses the maximum size that the physical media supports MTU fi 500 bytes Upper limit fi 500 To improve the performance of your Internet connection you can adjust the maximum transmission unit MTU of the packets that the DFL 700 transmits from its external interface Ideally you want this MTU to be the same as the smallest MTU of all the networks between the DFL 700 and the Internet If the packets the DFL 700 sends are larger they get broken up or fragmented which could slow down transmission speeds Trial and error is the only sure way of finding the optimal MTU but there are some guidelines that can help For example the MTU of many PPP connections is 576 so if you connect to the Internet via PPPoE you may want to set the MTU size to this value DSL modems may also have small MTU sizes Most Ethernet networks have an MTU of 1500 Note If you connect to your ISP using DHCP to obtain an IP address for the external interface you cannot set the MTU below 576 bytes due to DHCP communication standards Click the Apply button below to apply the settings or click Cancel to discard changes Routing Click on System in the menu bar and then click Routing below it this will provide a list of all configured routes and it will look something like this Routing table Interface Network Gate
17. Firewall Administrator may use the Status section to check the System Status Interface statistics VPN status IP connections and DHCP Servers Status System Click on Status in the menu bar and then click System below it A window will appear providing some information about the DFL 700 D Link Building Networks for People Uptime The time the firewall has been running since the last reboot or start Time The current time and date Configuration Shows when the last administrative configuration change was activated as well as the originating IP Firmware version The firmware version running on the firewall Last restart The reason for the last restart IDS Signatures The IDS signature database versions Resources Displays CPU load RAM usage Connections VPN Tunnels and Rules configured There are also two graphs on this page one shows the CPU usage during the last 24 hours The other shows the state table usage during the last 24 hours application Interfaces lhl VPN Connections Logging 9 2 8 3 a DFL 700 Network Security Firewall System _ Firewall Servers_ Tools System Status Uptime 0 days 22 33 05 Time 2005 05 10 20 50 22 Configuration Version 19 last changed at 2005 05 09 22 30 16 by admin from 192 168 1 2 Firmware version 1 32 00 Last restart 2005 05 09 22 30 16 Configuration changed by adm
18. LC I Delete user 0 0O Apply Cancel Help Note The password should be at least six characters long The password can contain numbers 0 9 and upper and lower case letters A Z a z Special characters and spaces are not allowed Delete User To delete a user click on the user name and you will see the following screen Follow these steps to delete a user Step 1 Click on the user you would like to delete Step 2 Enable the Delete user checkbox Click the Apply button below to apply the settings or click Cancel to discard changes User Management Edit user Todd User name Todd Group membership Nede ooo I Change password Password INI Retype password III M Delete user 0 0O Apply Cancel Help Note Deleting a user is irreversible once the user is deleted it cannot be undeleted 42 Schedules It is possible to configure a schedule for policies to take effect By creating a schedule the DFL 700 allows the firewall policies to be used only at those designated times Any activities outside of the scheduled time slot will not follow the policies and therefore will not likely be permitted to pass through the firewall The DFL 700 can be configured to have a start time and stop time as well as 2 different time periods in a day For example an organization may only want the firewall to allow the internal network users to D Link Building Networks for People
19. Management Edit user admin User name admin Group membership administrators Change password Password Retype password L2TP PPTP settings Static client IP IF empty the IP addre Networks behind user nill be taken from the server s IP pool Delete user Membership in the administrators group means that the user can administer this unit Membership in the auditors group means that the user has read only access to this unit O OO Apply Cancel Help Note Deleting a user is irreversible once the user is deleted it cannot be undeleted 38 Users User Authentication allows an administrator to grant or reject access to specific users from specific IP addresses based on their user credentials Before any traffic is allowed to pass through any policies configured with username or groups the user must first authenticate him her self The DFL 700 can either verify the user against a local database or pass along the user information to an external authentication server which verifies the user and the given password and transmits the result back to the firewall If the authentication is successful the DFL 700 will remember the source IP address of this user and any matching policies with usernames or groups configured will be allowed Specific policies that deal with user authentication can be defined thus leaving policies that do not require user authentication unaffected The
20. can be HTTPS or HTTP and HTTPS In the case where Read Only access is the only type allowed on a specific interface all users that log in to that interface will be in Read Only mode 12 SNMP Specifies if SNMP should or should not be allowed on the interface The DFL 700 only supports read only access Add ping access to an interface To add ping access click on the interface you would like to add it to Follow these steps to add ping access to an interface Step 1 Click on the interface you would like to add it to Step 2 Enable the Ping checkbox Step 3 Specify which network addresses should be allowed to ping the interface for example 192 168 1 0 24 for a whole class C network or 172 16 0 1 172 16 0 10 for a range of IP addresses Click the Apply button below to apply the settings or click Cancel to discard changes Example IV Ping standard ICMP echo to the IP address of the interface Networks 192 168 1 0 24 Add Admin access to an interface To add admin access click on the interface you would like to add it to Only users with administrative rights can login on interfaces where there is only admin access enabled Follow these steps to add admin access to an interface Step 1 Click on the interface you would like to add it to Step 2 Enable the Admin checkbox Step 3 Specify which network addresses should be allowed to access the administrative interface for example 192 168 1 0 24 for a whole class C netwo
21. changes and restart Similar steps can be taken to configure other services to be mapped to Internal Servers for access from Public Hosts Keep in mind that this configuration uses Network Address Translation Not all Protocols will work through NAT so be aware of the type of service in use Example Scenario using DMZ w out NAT An alternative method to that described in the preceding pages is to isolate publicly accessible servers to the DMZ interface with NAT disabled This configuration requires multiple at least 2 Public IP addresses to function as the Firewall will assume one IP and the Server s will use the other s Configure the Static Routes Routing T able Edit 192 168 10 2347255 255 255 255 route Interface DMZ Network 192 168 10 234 Subnet Mask 255 255 255 255 1 host 7 32 Gateway Network is behind remote gateway fo 0 0 0 Proxy ARP V Publish network on all other interfaces via Proxy ARP Additional IP Additional firewall IP address that hosts can use as gateway I Delete this route O 0 0 Apply Cancel Help A new route must be added to inform the firewall on which interface the Public IP will reside Navigate to SYSTEM gt ROUTING in the web based configuration of the DFL 700 Click on Add New to create a new static route Select DMZ as the Interface Enter the IP Address WAN Network you wish to forward to a server on the DMZ interface in the Network field Select a 3
22. could also be set to eg 192 168 1 200 If no IP is set here the IP pool from the L2TP server settings are used Set Networks behind user to 192 168 4 0 24 Click Apply 6 Click Activate and wait for the firewall to restart This example will allow all traffic between the two offices To get a more secure solution read the A more secure LAN to LAN VPN solution section in this chapter 96 A more secure LAN to LAN VPN solution In order to establish a more secure LAN to LAN VPN connection traffic policies should be created instead of allowing all traffic between the two private Networks The following steps show how to enable some common services allowed through the VPN tunnel In this example we have a mail server ftp server and a web server intranet in the main office that we want to access from the branch office Settings for Branch office 1 Setup policies for the new tunnel Firewall gt Policy Click Global policy parameters Firewall Policy Edit global policy parameters Fragments O Drop all fragmented packets Minimum TTL 3 YPN 7 Allow all VPN traffic intermal gt YPN VPN gt intemal and YVPN gt VPN Disable Allow all VPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 2 Now is it possible to create policies for the VPN interfaces Select from LAN to toMainOffice and click Show e LAN gt DMZ policy 3 rules e DMZ gt LAN policy 0 rules e WAN gt DMZ policy 0 rules e DMZ
23. in any form or by any means or used to make any derivative such as translation transformation or adaptation without permission from D Link Corporation D Link Systems Inc as stipulated by the United States Copyright Act of 1976 Contents are subject to change without prior notice Copyright 2005 by D Link Corporation D Link Systems Inc All rights reserved FCC Statement This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in an industrial installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communication However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help For detailed warranty out
24. is normally routed via another interface The major difference between this form of notation and the form most commonly used is there is no need to specify the interface name in a separate column Instead you specify the IP address of each interface as a gateway Note Proxy ARP will publish the remote network on all interfaces except WAN if enabled on the VPN tunnel 22 Add a new Static Route Follow these steps to add a new route Step 1 Go to System and Routing Step 2 Click on Add new in the bottom of the routing table Step 3 Choose the interface that the route should be sent through from the dropdown menu Step 4 Specify the Network and Subnet mask Step 5 If this network is behind a remote gateway enable the checkbox Network is behind remote gateway and specify the IP of that gateway Click the Apply button below to apply the settings or click Cancel to discard changes Remove a Static Route Follow these steps to remove a route Step 1 Go to System and Routing Step 2 Click the Edit corresponding to the route you would like to remove Step 3 Check the checkbox named Delete this route Click the Apply button below to apply the settings or click Cancel to discard changes Logging Click on System in the menu bar and then click Logging below it Logging the ability to audit decisions made by the firewall is a vital part in all network security products The D Link DFL 700 provides several options for
25. of these ICMP types have a code field Here we list the types with their assigned code fields Type Name Code Description Reference 0 Echo Reply 0 No Code RFC792 3 Destination Unreachable 0 Net Unreachable RFC792 1 Host Unreachable RFC792 2 Protocol Unreachable RFC792 3 Port Unreachable RFC792 4 Fragmentation Needed and RFC792 Don t Fragment was Set 5 Source Route Failed RFC792 6 Destination Network Unknown RFC792 7 Destination Host Unknown RFC792 8 Source Host Isolated RFC792 9 Communication with RFC792 Destination Network is Administratively Prohibited 10 Communication with RFC792 Destination Host is Administratively Prohibited 11 Destination Network RFC792 Unreachable for Type of Service 12 Destination Host Unreachable RFC792 for Type of Service 13 Communication RFC1812 Administratively Prohibited 14 Host Precedence Violation RFC1812 15 Precedence cutoff in effect RFC1812 4 Source Quench 0 No Code RFC792 5 Redirect 0 Redirect Datagram for the RFC792 118 10 11 12 13 14 15 16 17 18 30 31 40 Echo Router Advertisement Router Selection Time Exceeded Parameter Problem Timestamp Timestamp Reply Information Request Information Reply Address Mask Request Address Mask Reply Traceroute Datagram Error Photuris Conversion O O O O O O N a O 0 1 2 3 4 5 Network or subnet Redirect Datagram for the Host Redirect Datagram for the Type of Service and Networ
26. only checked option MPPE encryption None 1 40 bit C 56 bit 128 bit air is only possible when using MSCHAP or MSCHAP v2 as authenti protoco N Use IPsec encryption PSK Pre Shared Key Key peed XXXXXXXXXX Retype key Certificate based Check Use IPSec encryption Enter key 1234567890 Note You should not use this key Retype key 1234567890 Click Apply 94 3 Setup policies for the new tunnel Firewall gt Policy Firewall Policy Edit global policy parameters Fragments 0O Drop all fragmented packets Minimum TTL 3 VPN Allow all YPN traffic intemal gt YPN VPN gt internal and VPN gt VPN Click Global policy parameters Enable Allow all VPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 4 Set up authentication source Firewall gt Users Authentication source Local database RADIUS server Select Local database Click Apply 5 Add a new user Firewall gt Users Under Users in local database click Add new User Management Add new user Username BranchOffice Group membership Password pec Retype password 17x L2TP PPTP settings Static client IP If empty the IP address will be taken from the server s IP pool Networks behind ser 192 168 4 0 24 Name the new user BranchOffice Enter password 1234567890 Retype password 1234567890 Leave static client IP empty
27. other than D Link Products that have been purchased from inventory clearance or liquidation sales or other sales in which D Link the sellers or the liquidators expressly disclaim their warranty obligation pertaining to the product Repair by anyone other than D Link or an Authorized D Link Service Office will void this Warranty Disclaimer of Other Warranties EXCEPT FOR THE LIMITED WARRANTY SPECIFIED HEREIN THE PRODUCT IS PROVIDED AS IS WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT IF ANY IMPLIED WARRANTY CANNOT BE DISCLAIMED IN ANY TERRITORY WHERE A PRODUCT IS SOLD THE DURATION OF SUCH IMPLIED WARRANTY SHALL BE LIMITED TO NINETY 90 DAYS EXCEPT AS EXPRESSLY COVERED UNDER THE LIMITED WARRANTY PROVIDED HEREIN THE ENTIRE RISK AS TO THE QUALITY SELECTION AND PERFORMANCE OF THE PRODUCT IS WITH THE PURCHASER OF THE PRODUCT 136 Limitation of Liability TO THE MAXIMUM EXTENT PERMITTED BY LAW D LINK IS NOT LIABLE UNDER ANY CONTRACT NEGLIGENCE STRICT LIABILITY OR OTHER LEGAL OR EQUITABLE THEORY FOR ANY LOSS OF USE OF THE PRODUCT INCONVENIENCE OR DAMAGES OF ANY CHARACTER WHETHER DIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL INCLUDING BUT NOT LIMITED TO DAMAGES FOR LOSS OF GOODWILL LOSS OF REVENUE OR PROFIT WORK STOPPAGE COMPUTER FAILURE OR MALFUNCTION FAILURE OF OTHER EQUIPMENT OR COMPUTER PROGRAMS TO WHICH D LINK
28. policies a re listed here These u se rs Got mitacer with a policy where source and or destination users groups are set are available for user and groups will be able to use EET HTTP and HTTPS He authentication vse Interfaces where authentication are available here all interfaces where HTTP and HTTPS authentication is possible is listed 76 How to read the logs Although the exact format of each log entry depends on how your SYSLog recipient works most are very similar The way in which logs are read is also dependent on how your SYSLog recipient works SYSLog daemons on UNIX servers usually log to text files line by line Most SYSLog recipients preface each log entry with a timestamp and the IP address of the machine that sent the log data Oct 20 2003 09 45 23 gateway This is followed by the text the sender has chosen to send All log entries from the DFL 700 are prefaced with EFW and a category e g DROP Oct 20 2003 09 45 23 gateway EFW DROP Subsequent text is dependent on the event that has occurred USAGE events These events are sent periodically and provide statistical information regarding connections and amount of traffic Example Oct 20 2003 09 45 23 gateway EFW USAGE conns 1174 if0 core ip0 127 0 0 1 tp0 0 00 iff wan ip1 192 168 10 2 tp1 11 93 if2 lan ip2 192 168 0 1 to2 13 27 if3 dmz ip3 192 168 1 1 tp3 0 99 The value after conns is the number of open connectio
29. provided to simplify the configuration of HTTP Content Filtering Refer to Appendix D for more detailed information on configuration of HTTP Content Filtering Active content handling Active content handling can be enabled or disabled by checking the checkbox before each type you would like to strip For example to strip ActiveX and Flash enable the checkbox named Strip ActiveX objects It is possible to strip ActiveX Flash Java JavaScript and VBScript It is also possible to block cookies Note For HTTP URL filtering to work all HTTP traffic needs to go through a policy using a service with the HTTP ALG A pre defined HTTP outbound TCP All gt 80 ALG http cf max 100 service is provided to simplify the configuration of HTTP Content Filtering Refer to Appendix D for more detailed information on configuration of HTTP Content Filtering Servers DHCP Server Settings The DFL 700 contains a DHCP server DHCP Dynamic Host Configuration Protocol is a protocol that allows network administrators to automatically assign IP numbers to DHCP enabled computers on a network The DFL 700 A o DHCP Server helps to D Link ESIa ildi DFL 700 minimize the work Building Networks for People Makoi Security Firewall necessary to administer a network as there is no System __ Firewall Tools __ Status Help need for another DHCP ea DHCP Server Relaying Settings server erse DHCP server relaying settings for LAN interface The DF
30. reaching the PCs on the LAN or DMZ of the NetDefend Firewall filtering of HTTP traffic can be customized and enabled This filter can be configured to strip ActiveX objects including flash Java Applets Visual Basic Java Scripts and or block cookies In addition a Whitelist is configurable to define URLs that will always be allowed Conversely a Blacklist is provided to allow customizable filtering of websites domains and even file types based on file extension All of the aforementioned filters function simultaneously if enabled configured when HTTP content filtering is enabled In order for HTTP content filtering to be performed all HTTP traffic must pass through an outbound policy utilizing the HTTP ALG Due to this behavior content filtering can be applied to either LAN or DMZ interface simultaneously or independent of one another Keep in mind that the content filtering specifications are global and will apply to every instance of a rule using the HTTP ALG Two configurations need to be made in order to use HTTP Content Filtering The Whitelist and Blacklist must be customized to suit the desired filtering requirements HTTP traffic on an interface LAN or DMZ must be bound to a rule using the HTTP ALG HTTP Content Filtering Changes to these settings affect services that use the HTTP HTML Content Filtering ALG By default this includes the http outbound service Global Destination URL Whitelist URLs matching the globa
31. tab PORT MAPPING page of the Web based configuration Click the Add New link to create a new Port Mapping Input the Public IP address to be forwarded in the Destination IP field Select the Service to be forwarded to the Internal Server pre defined or custom Enter the Private IP of the Server in the Pass To field Configure Scheduling IDS IDP and or Bandwidth Management if desired Click Apply to save the configuration 124 Configure Port Mapping Virtual Server Rules for DMZ Server Port Mapping Virtual Servers Edt mew mapping Name Web_server DMZ Source Nets Blank everyone Users Groups Any Any authenticated Destination IP 90 90 90 82 Hank gt WAN interface IP addiess Service Ftp Custom source parts Blank any port destination parts pass to pot and up Blank no change Pass To 192 168 10 100 Schedule Always Virtual Server Configuration for a Server on the DMZ Navigate to the FIREWALL tab PORT MAPPING page of the Web based configuration Click the Add New link to create a new Port Mapping Input the Public IP address to be forwarded in the Destination IP field Select the Service to be forwarded to the Internal Server pre defined or custom Enter the Private IP of the Server in the Pass To field Configure Scheduling IDS IDP or Bandwidth Management if desired Click Apply to save the configuration Click Activate Changes to apply
32. the client to the main office network To get a more secure solution read the Settings for the Main office part of the A more secure LAN to LAN VPN solution section 110 Windows XP client and L2TP server Main office Internet VPN Client lb 194 03 7 The Windows XP client to L2TP server setup is quite similar to the PPTP setup above Settings for the Windows XP client To setup a L2TP connection from Windows XP to the Main office firewall please follow the steps in the PPTP guide above for the client side The only changes to the PPTP guide are MainOffice Properties General Options Security Networking Advanced Type of VPN L2TP IPSec VPN v 1 In step 13 change the Type of VPN to L2TP IPSec VPN MainOffice Properties General Options Security Networking Advanced Security options poocoesesocsesesocossesococsessccosecossesesococcocscsesocsssesecosseseseeg Validate my identity as follows Require secured password v C Automatically use my Windows logon name and password and domain if any Require data encryption disconnect if none Advanced custom settings sce settings e re akn IPSec Settings 2 Select the Security tab and click IPSec Settings IPSec Settings Use pre shared key for authentication Key 1234567890 3 Check Use pre shared key for authentication type the key and cli
33. the highest priority when large amounts of data are moving through the DFL 700 For example the policy for the web I Traffic shaping interface speed limits Interface Settings Edit settings of the WAN interface Change WAN Type Big Pond z Regular ethernet connection with DHCP assigned IP address plus authentication via a special protocol Used by the ISP Telstra BigPond Usemame Password Retype Password In order to do traffic shaping beyond simple limits such as guarantees and priorities the traffic shaper needs to know what the maximum bandwidth is Throughput through this interface will be limited to these speeds If the limits are set too high traffic shaping will not work Upstream bandwidth kbit s Downstream bandwidth kbit s server might be given higher priority than the policies for most employees computers You can use traffic shaping to guarantee the amount of bandwidth available through the firewall for a policy Guarantee bandwidth to make sure that there is enough bandwidth available for a high priority service You can also use traffic shaping to limit the amount of bandwidth available through the firewall for a policy Limit bandwidth to keep less important services from using bandwidth needed for more important services Note If the limit is set too high i e higher then your Internet connection the traffic shaping will not work at all 20 MTU Configuration M Manual Interface MTU
34. to add one that already exists Step 3 Specify which groups the user should be a member of Step 3 Specify the password for the new user Click the Apply button below to apply the settings or click Cancel to discard changes User Management Add new user User name Group membership Password Retype password L2TP PPTP settings Static client IP If empty the IP address will be taken from the server s IP pool Networks behind user Apply Cancel Help Select a user to edit from the below list or select Add new Administrative users Admin admin Add Read only Add Users in local database User name Client IP ange Add new Groups Note The user name and password should be at least six characters long The user name and password can contain numbers 0 9 and upper and lower case letters A Z a z Special characters and spaces are not allowed Change User Password To change the password of a user click on the user name and you will see the following screen Follow these steps to change a user password Step 1 Click on the user for which you would like to change the password Step 2 Enable the Change password checkbox Step 3 Enter the new password twice Click the Apply button below to apply the settings or click Cancel to discard changes User Management Edit user Todd User name foa Group membership Nede ooo i M Change password Password 7 Retype password
35. to use DFL 700 network address translation to protect private networks from public networks In NAT mode you can connect a private network to the internal interface a DMZ network to the DMZ interface and a public network such as the Internet to the external interface Then you can create NAT mode policies to accept or deny connections between these networks NAT mode policies hide the addresses of the internal and DMZ networks from users on the Internet In No NAT Route mode you can also create routed policies between interfaces Route mode policies accept or deny connections between networks without performing address translation To use NAT mode select Hide source addresses many to one NAT and to use No NAT Route mode choose No NAT Action Types Drop Packets matching Drop rules will immediately be dropped Such packets will be logged if logging has been enabled in the Logging Settings page Reject Reject works basically the same way as Drop In addition to this the firewall sends an ICMP UNREACHABLE message back to the sender or if the rejected packet was a TCP packet a TCP RST message Such packets will be logged if logging has been enabled in the Logging Settings page Allow Packets matching Allow rules are passed to the stateful inspection engine which will remember that a connection has been opened Therefore rules for return traffic will not be required as traffic belonging to open connections is automatically dea
36. two beeps At this point the Firewall is loading the factory default configuration Step 4 Allow at least 1 minute for the Firewall to completely restart At this point the firewall can be accessed via its default LAN IP 192 168 1 1 through a web browser The first login will require the use of the Wizard to complete basic connectivity configurations You can restore your system settings by uploading a previously generated system configuration file to the DFL 700 if a backup of the device has been downloaded to your Local Machine Prior to reset Upgrade The DFL 700 s software IDS signatures and system parameters are all stored on a flash memory card The flash memory card is re writable and re readable Upgrade Firmware To upgrade the firmware of the DFL 700 obtain the latest version from support dlink com US Make sure the firmware file is stored on the PC connected to the firewall Connect to the web based GUI navigate to the Upgrade Tools menu click Browse and choose the file name of the newest version of firmware you wish to load Click Upload firmware image to load the new firmware and restart the device The updating process will not overwrite the system D Link Building Networks for People p Reset DFL 700 Network Security Firewall System _ Firewall _Servers Upgrade Upgrade unit s firmware To upgrade the unit s firmware download the firmware upgrade from the
37. using Traffic shaping fill in the required information If not skip this step Click the Apply button below to apply the changes or click Cancel to discard changes Note Refer to Appendix C of the manual for details on mapping Public IP addresses to Internal Servers 34 Delete mapping Follow these steps to delete a mapping Step 1 Choose the mapping list WAN LAN or DMZ you would like do delete the mapping from Step 2 Click on the Edit link corresponding to the rule you want to delete Step 3 Enable the Delete mapping checkbox Click the Apply button below to apply the changes or click Cancel to discard changes Administrative users Click on Firewall in the menu bar and then click Users below it This will show all the users and the first section is the administrative users Administrative users Admin admin Add Read only auditor Add The first column shows the access levels Administrator and Read only An Administrator user can add edit and remove rules change settings of the DFL 700 and so on The Read only user can only look at the configuration The second column shows the users in each access level Add Administrative User Follow these steps to add a new administrative user Step 1 Click on add after the type of user you would like to add Admin User Management or Read only Edit user admin Step 2 Fill in User name make User name admin sure you are not trying to add one Group membership
38. will save the configuration and reload it making the new changes take effect In order to make the changes permanent the administrator must login again This has to be done before a configurable timeout has been reached otherwise the DFL 700 will revert to the previous configuration The timeout can be set on the Activate Configuration Changes page by choosing the time from the dropdown menu Activate Changes Routing Logging AAM Time Resetting the DFL 700 To reset the DFL 700 to factory default settings you must first press and hold the reset button Power on the unit and continue to hold the reset button for at least 15 seconds You will first hear one beep which indicates that the default configuration restoration has started Keep the button pressed in until you hear two consecutive beeps shortly after each other After this you can release the reset button and the DFL 700 will continue to load and startup in default mode i e with 192 168 1 1 on the LAN interface For more information on the reset procedure refer to page 69 Administration Settings Administrative Access Administration Settings Management web GUI ports HTTP Pott Jeo HTTPS Port 443 For security reasons it may be better to run the management web GUI on non standard ports Also note that if web based user authentication is enabled ports 80 and 443 will be taken the management web GUI has to use other ports Apply Cancel Help
39. 2 bit subnet mask from the Subnet Mask dropdown box Be sure to have Proxy ARP enabled by checking the checkbox Click Apply to save any changes 126 Modify Existing WAN Route Routing Table Edit 192 168 10 0 255 255 255 0 route Note that this is the local network route for the interface you can only change the Proxy ARP setting Interface WAN z Network 192 168 10 0 Subnet Mask 255 255 255 0 256 hosts 24 Gateway 7 Network is behind remote gateway fo 0 0 0 Proxy ARP Publish network on all other interfaces via Proxy ARP Additional IP Additional firewall IP address that hosts can use as gateway O 0 0 Apply Cance Help The default WAN route must be modified to enable Proxy ARP The default route for any interface cannot be deleted or modified other than to enable the Proxy ARP feature From the SYSTEM gt ROUTING page select WAN to edit the default route of the WAN interface Enable the Proxy ARP feature by checking the checkbox After making configuration changes be sure to click Apply to save those changes to RAM Disable NAT on the DMZ Interface Firewall Policy Show policy LAN gt WAN LAN gt DMZ WAN gt DM2Z WAN gt LAN DMZ gt LAN DMZ gt WAN Settings for DMZ gt WAN policy NAT e Hide source addresses many to one NAT No NAT requires public IP addresses on DMZ network 90 90 Apply Cancel Help Select Add New below or select a rule from the
40. 7 0020 2012 5678 0020 e012 6789 Time remaining Shrs 23 minutes 2 hrs 12 minutes 6 hrs 55 minutes End lease End lease End lease End lease 9 hrs 47 minutes Inactive leases will be replaced if the pool is full IP Address MAC Address 192 168 1 102 0020 e012 789a Forget mapping Inactive leases are leases that are not currently in use but have been used by a computer before That computer will get the lease the next time it is on the network If there is no free IP in the pool these IP s will be used for new computers Users Click on Status in the menu bar and then click Users below it A window will appear providing user information A D Link c u rrently authenticated Building Networks for People DFL 700 users users logged in using Network Security Firewall HTTP HTTPS authentication _System__Firewall__Servers__Tools_ Help users logged in on PPTP and vall_S L2TP servers will be listed here Of es Users can be forced to log out by clicking logout Currently authenticated users Login User Session Idle is Teea Logn User Maco Session Ile privteges Method Logout Currently recognized privileges usemames and groups Currently recognized Only users groups used in policy rules are shown here Both users groups for source and destination nets are isted PN privileges all users and Interfaces where authentication are available groups that are used in
41. D Link DFL 700 NETDEFEND Network Security Firewall Manual eo D Link Building Networks for People 04 18 2005 Contents MEMEO NGO siete aaaea 7 Features and Benefits sisccd acess nea vcnetetecennldedcestixbinccsrnedeesusbictaticemenm ane 7 Introduction to Firewalls 2 casseteatesactestcnestaistsceeaimecidesamubaneteneseeales 7 Introduction to Local Area Networking e ssesssssssssererrrssssssrerrrrrssssseees 8 WE Siege sasnanessnactsgessagecdasasaayeesiieaagsy E iS 9 Physical COIS CUTS ant ss cnctd seca a scdet ccameediudsecdstammedeg leuasSdeeshatedtadaisbiae 9 Package Osa 10 1 Cee me eee eee eer ene eee ees ere ee eer ee rere 10 System Requirements a ciseseteccdectedecisdiord iteswnsasitiad bedeiewienieds Paxceeustitncants 10 Managing D Link DFL 700 ceeeeeeee eee e eset eee e ee ee eee eeeeeeeeeeeeeeeeee 11 Resetting the DFL 00 3 01 ccseiceceeseeneieieeeesactnee tients asi eeiesaeeneeneriesie 11 Administration Settings ee sa anere i 12 Administrative ACCESS accent tsinisnceucnethiacitsrcadadnen ladle labia ssutacedehsatiiasasan dts 12 Add ping access to an interface eecceeeeeeeeeeeeneeeeeetteeeeeeeneeeeeeneeeesenas 13 Add Admin access to an interface cccceecceceeeeneeeeeenieeeeeeenieeeeeeneeeeeenas 13 Add Read only access to an interface 0 00 0 eee eeeeeeeeeeteeeeeeteteeeeeeneeeeeenas 14 Enable SNMP access to an interface ececeee ester ee teeeeeeeeteneeeeeeneeeeee 14 EDEA ae E
42. D Link support web site and place it on your hard drive When the firmware is available use this form to upload the new firmware to the unit The unit will automatically be restarted to activate the new firmware I Browse Upload firmware image Upgrade unit s signature database To upgrade the unit s IDS signature database download the new signature database file from the D Link support web site and place it on your hard drive When the signature file is available use this form to upload it to the unit After the new signature database has been verified the unit will automatically be restarted to activate the changes Browse Upload signature database configuration Though it is not necessary it is a good idea to backup the system configuration before upgrading the software Upgrade IDS Signature database To upgrade the signature database first download the newest IDS signatures from D Link After downloading the newest version of the software connect to the firewall s Web based configuration GUI enter Upgrade on the Tools menu click Browse in the Upgrade Unit s signature database section and choose the file name of the newest version of the IDS signatures Then click Upload signature database Beginning with firmware version 1 30 the IDS Signature database will automatically update itself once enabled on a policy 70 Status In this section the DFL 700 displays the status information about the
43. DFL 700 supports the RADIUS Remote Authentication Dial In User Service authentication protocol This protocol is heavily used in many scenarios where user authentication is required either by itself or as a front end to other authentication services The DFL 700 RADIUS Support The DFL 700 can use RADIUS to verify users against for example Active Directory or Unix password file It is possible to configure up to two servers if the first one is down it will try the second IP instead The DFL 700 can use CHAP or PAP when communicating with the RADIUS server CHAP Challenge Handshake Authentication Protocol does not allow a remote attacker to extract the user password from an intercepted RADIUS packet However the password must be stored in plaintext on the RADIUS server PAP Password Authentication Protocol may be defined as the less secure of the two If a RADIUS packet is intercepted while being transmitted between the firewall and the RADIUS server given time the user password can be extracted The advantage to this is that the password does not have to be stored in plaintext in the RADIUS server The DFL 700 uses a shared secret when connecting to the RADIUS server The shared secret enables basic encryption of the user password when the RADIUS packet is transmitted from the firewall to the RADIUS server The shared secret is case sensitive can contain up to 100 characters and must be typed exactly the same on both the firewall and th
44. E Phase 2 IPSec Security Negotiation A Proposal List is used to group several proposals During the negotiation process the proposals in the proposal list are offered to the remote VPN gateway one after another until a matching proposal is found IKE Proposal List Cipher Specifies the encryption algorithm used in this IKE proposal Supported algorithms are AES 3DES DES Blowfish Twofish and CAST128 Hash Specifies the hash function used to calculate a check sum that reveals if the data packet is altered while being transmitted MD5 and SHA are supported algorithms Life Times Specifies in KB or seconds when the security associations for the VPN tunnel need to be re negotiated IPSec Proposal List Cipher Specifies the encryption algorithm used in this IPSec proposal Supported algorithms are AES 3DES DES Blowfish Twofish and CAST128 HMAC Specifies the hash function used to calculate a check sum that reveals if the data packet is altered while being transmitted MD5 and SHA1 are supported algorithms Life Times Specifies in KB or seconds when the security associations for the VPN tunnel need to be re negotiated Certificates A certificate is a digital proof of identity It links an identity to a public key in a trustworthy manner Certificates can be used to authenticate individual users or other entities These types of certificates are commonly called end entity certificates Before a VPN tun
45. FE E ATA tte cndeags Sulseet Jeet teas tae 28 Poly MOO Scis seh neddceuvabienceyvubdea TO E 28 Aetion TPo S eenoneoiii n an ea N E A AAA 28 Source and Destination Filter ccccccceceeeeeceeceeeeeeeseceneeeeeeeeeseseseneaees 28 Service Fiteni abiases Vandeslinadwadeeusaddecayagialecesebancdniase 29 Schedule saeiccesienvacetvandecesasdadeearaastacetyaudodih shadvenandedinaauaduasyaadenivadanledevedansdiiaas 29 Intrusion Detection Prevention ccccceeeeeeeeeeecaeeeeeeeseseenneeeeeeeenteeteees 30 Trate Shaping sesoses AEE 30 Adda NOW POllCy ossis iaaa R A A 31 Change order of policy ccceceeeeeeeeeeeeeeeeeeeeeeneeeeeseeeaeeeeseneaeeeseeaeeeeenaaees 32 Delete POliCy e ceeccceceeeceeceeeeeeeeeeeseeeeeeeseneeeeeseeeeeeeeseeeaeeeeeeaeeeseeaeeeseeaaeees 32 Configure Intrusion Detection ceeceeeeeeeeeeeeeeeeeeeeeeeeseeeeeeseeeteeeeeaaees 32 Configure Intrusion Prevention cccceeeeeeeeeneeeeeeeeneeeeeeteeeeeenaeeeeeenaees 33 Port mapping Virtual Servers cecceeeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeneeeees 34 Add a NEW mapping innisin diini i ea aaa a aaa aes 34 Delete mapping airen eaa a eean 35 Administrative USCIS ceseeeseeeseeeeeeeeeeeeeeeeeeeeeeeseaeeeeeaeeeseeeseeees 36 Add Administrative USET iaiccc seccuanaccdssasaateaatanadenexastandiaanencvedsauaeciearandecnacaad 36 Change Administrative User Access level ecceececeeeeeeeceenneeeeteenteeeeeeeaees 37 Ch
46. L 700 DHCP C No DHCP processing Server on ly im p lements a The unit wil ignore DHCP requests heard on this interface subset of the DHCP C Use built in DHCP Server protocol necessary to mall network DNS Serves serve a sma etWwork Trenton these are FF Use unit s own DNS relayer addresses WINS Servers optional e IP address Tenor WINS servers are used for name resolution in windows network e N etmas k Domain name optional Lease time 3 hours e Subnet The gateway wil be set to the IP address of the receiving interface Relay DHCP requests to other DHCP server s Gateway Server IP address e D N S Serve rs Apply Cancel Help e WINS Available interfaces LAN Serve IP span 192 168 1 100 192 168 1 200 Servers ie 5 VPNTunnell Relay to server 192 168 1 15 e Domain name The DFL 700 DHCP Server assigns and manages IP addresses from specified address pools within the firewall to the DHCP clients Note Leases are remembered over a re configure or reboot of the firewall The DFL 700 also includes a DHCP Relay function A DHCP Relay allows the DFL 700 to receive DHCP requests and forward those requests to a specified DHCP server The relay function allows the use of existing DHCP servers in conjunction with the DFL 700 to ensure all users on all interfaces receive IP addresses when requested The DFL 700 will also configure dynamic routes based on those DHCP leases This enables the firewall to keep an accurate routing ta
47. MS CHAPv2 is not backwards compatible with MS CHAP v1 Both the Remote Access Server and the client must prove they have knowledge of the password via two way Challenge response messages MPPE Microsoft Point To Point Encryption MPPE is used is used to encrypt Point to Point Protocol PPP packets MPPE uses the RSA RC4 algorithm to provide data confidentiality The length of the session key to be used for the encryption can be negotiated MPPE currently supports 40 bit 56 bit and 128 bit RC4 session keys 50 L2TP PPTP Clients Settings for L2TP PPTP Client Configuration Name Specifies a friendly name for the PPTP L2TP Client tunnel Username _ Specify the username for this PPTP L2TP Client tunnel Password Confirm Password The password to use for this PPTP L2TP Client tunnel Interface IP Specifies if the L2TP PPTP Client tunnel should use a Static IP or obtain a dynamic IP from the server The IP remote Remote Gateway address of the PPTP L2TP Server Dial on demand Authentication protocol Specify which authentication protocol to use if any Refer to the Authentication Protocols section for more information about each type MPPE encryption If MPPE encryption is to be used select the desired level of encryption key MPPE is used with PPTP A selection of None means that data will be sent over the PPP link unencrypted Require IPSec encryption If configuring for L2TP
48. Office and click Next 104 New Connection Wizard Public Network Windows can make sure the public network is connected first Windows can automatically dial the initial connection to the Intemet or other public network before establishing the virtual connection 8 Select Do not dial the initial connection and click Next New Connection Wizard VPN Server Selection What is the name or address of the VPN server A Type the host name or Intemet Protocol IP address of the computer to which you are connecting Host name or IP address for example microsoft com or 157 54 0 1 194 0 2 20 9 Type the IP address to the server 194 0 2 20 and click Next 10 Click Finish 106 Connect MainOffice 11 Type user name HomeUser and password 1234567890 Note You should use a password that is hard to guess 12 Click Properties MainOffice Properties E This connection uses the following tems Intemet Protocol TCP IP JB QoS Packet Scheduler J2 File and Printer Sharing for Microsoft Networks M E Client for Microsoft Networks Ca Ca O Description Transmission Control Protocol Intemet Protocol The default wide area network protocol that provides communication across diverse interconnected networks 13 Select the Networking tab and change Type of VPN to PPTP VPN Click OK All settings needed for the XP client are now complete Once we have configu
49. P O CHAP go MSCHAP MPPE encryption possible N MSCHAP v2 MMPE encryption possible Under authentication MSCHAPv2 should be the only checked option MPPE encryption C None C 40 bit C 56 bit 128 bit Encryption is only possible when using MSCHAP or MSCHAP v2 as authentication protocol _ Use IPsec encryption Under MPPE encryption 128 bit should be the only checked option Leave Use IPSec encryption unchecked Click Apply 3 Setup policies for the new tunnel Firewall gt Policy Click Global policy parameters Enable Allow all VPN traffic internal gt VPN VPN gt internal and VPN gt VPN Firewall Policy Edit global policy parameters Fragments Drop all fragmented packets Minimum TTL 3 YPN Allow all YPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 4 Click Activate and wait for the firewall to restart Settings for Main office 1 Setup interfaces System gt Interfaces WAN IP 194 0 2 20 LAN IP 192 168 1 1 Subnet mask 255 255 255 0 86 2 Setup PPTP server Firewall gt VPN Under L2TP PPTP Server click Add new PPTP server L2TP PPTP Servers Add PPTP tunnel Name pptpServer Outer IP Blank WAN IP Must be WAN IP if IPsec encryption is required Inner IP Blank LAN IP IP Pool and settings Client IP Pool 192 168 1 100 192 168 1 199 Proxy ARP dynamically added routes Primary DNS Optiona
50. S PRODUCT IS CONNECTED WITH LOSS OF INFORMATION OR DATA CONTAINED IN STORED ON OR INTEGRATED WITH ANY PRODUCT RETURNED TO D LINK FOR WARRANTY SERVICE RESULTING FROM THE USE OF THE PRODUCT RELATING TO WARRANTY SERVICE OR ARISING OUT OF ANY BREACH OF THIS LIMITED WARRANTY EVEN IF D LINK HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES THE SOLE REMEDY FOR A BREACH OF THE FOREGOING LIMITED WARRANTY IS REPAIR REPLACEMENT OR REFUND OF THE DEFECTIVE OR NON CONFORMING PRODUCT THE MAXIMUM LIABILITY OF D LINK UNDER THIS WARRANTY IS LIMITED TO THE PURCHASE PRICE OF THE PRODUCT COVERED BY THE WARRANTY THE FOREGOING EXPRESS WRITTEN WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ANY OTHER WARRANTIES OR REMEDIES EXPRESS IMPLIED OR STATUTORY Governing Law This Limited Warranty shall be governed by the laws of the State of California Some states do not allow exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts so the foregoing limitations and exclusions may not apply This limited warranty provides specific legal rights and the product owner may also have other rights which vary from state to state Trademarks D Link is a registered trademark of D Link Systems Inc Other trademarks or registered trademarks are the property of their respective manufacturers or owners Copyright Statement No part of this publication or documentation accompanying this Product may be reproduced
51. S y usneseni a e a E tds SE EEE eae 56 Proposal LiStSsroccnsiseneii ninen a a a E E eA a EEEE 57 IKE Proposal List eseuri aa ae rte 57 IPSec Proposal Listariinisnrai aea a aa ae 57 Certificates ccccccceccceecceecceeeceeeceecececeeececeeeceseeeeseeseeseseaesaneseaeeanesaas 58 Trusting Certificates s cctecl kites iii aiedi haaedtaaedhs hain niin lide nas 58 LOcal identities orereseninri dininin an E E 58 Certificates of remote Peers ccccceceeeeeceeceeceeeeeeeeeseaneeceeeeeeeesensenneeeees 58 Certificate AUtNOMtes encecncarcirini nnna A E 58 Identiese E E lide be li ak aka 59 Content FilternNgusiis minsin inai aai aaa A ENE ESA 60 Edit the URL Global Whitelist 0 c ccccccseeceeeeeeeeeeeeeseeeeeeeeeseeeeeteaeessnees 60 Edit the URL Global Blacklist cc cccccceeseeeeeeeseeeeeeeeeeeeeeeeteeeeseeeeseeees 61 Active content handling ic ccccecsaeceeesieeeeeesniceeeesnaceevbaniees eevuniecseeanneeesanie 61 Oe E E A A A T E A ER 62 DHCP Server SettingS 0 00ssssssssssrrrrnrrnnunrrrrnnnnunnnnnnnnnnnunnneaaeeeeeesnee 62 Enable DHCP SEVE tecccivie dace oE eat hie eee 63 Enable DHCP Relay vii iessecaenis tienater ie arn eevnreal neta 63 Disable DHCP Server Relay c cccceeceecceeeeeeeeeeseeneeeeseeneeeeteeeneeeeeenanes 63 DNS Relay Settings sissies sia csdeede seebeccericrna Stace icateeebiansgannaceoneeemanes 64 Enable DNS Relayer cccisisccieaveudecaveniecis kii EEE nace sive EAA 64 Disable DNS REA
52. TCP port 1723 for it s control connection and uses GRE IP protocol 47 for the PPP data PPTP supports data encryption by using MPPE 48 Introduction to L2TP L2TP Layer 2 Tunneling Protocol a combination of Microsofts PPTP and Cisco s L2F Layer 2 Forwarding is used to provide IP security at the network layer An L2TP based VPN is made up by these parts e Point to Point Protocol PPP e Authentication Protocols PAP CHAP MS CHAP v1 MS CHAP v2 e Microsoft Point To Point Encryption MPPE L2TP uses UDP to transport the PPP data this is often encapsulated in IPSec for encryption instead of using MPPE Point to Point Protocol PPP Point to Point Protocol is a standard for transporting datagram s over point to point links PPP is used to encapsulate IP packets for transport between two peers PPP consists of these three components e Link Control Protocols LCP to negotiate parameters test and establish the link e Network Control Protocol NCP to establish and negotiate different network layer protocols DFL 700 only supports IP e Data encapsulation to encapsulate datagram s over the link To establish a PPP tunnel both sides send LCP frames to negotiate parameters and test the data link If authentication is used at least one of the peers has to authenticate itself before the network layer protocol parameters can be negotiated using NCP During the LCP and NCP negotiation optional parameters such as encryption can be ne
53. Users in local database click Add new Name the new user BranchOffice User Management Add new user User name Group membership Password Retype password L2TP PPTP settings Static client IP Networks behind user BranchOffice xxx KAME f empty the IP address will be taken from the server s IP pool 192 168 4 0 24 Enter password 1234567890 Retype password 1234567890 Leave static client IP empty could also be set to 192 168 1 200 If no IP is set here the IP pool from the PPTP server settings are used Set Networks behind user to 192 168 4 0 24 Click Apply 6 Click Activate and wait for the firewall to restart This example will allow all traffic between the two offices To get a more secure solution read the A more secure LAN to LAN VPN solution section LAN to LAN VPN using L2TP Main office Oy K cay bp 09 792 es 76 76g vey K 7 an w LO ozn Internet Ig o i AM N F Wee 194 Settings for Branch office 1 Setup interfaces System gt Interfaces WAN IP 194 0 2 10 LAN IP 192 168 4 1 Subnet mask 255 255 255 0 2 Setup L2TP client Firewall gt VPN Under L2TP PPTP client click Add new L2TP client Name the server toMainOffice L2TP PPTP Clients Add L2TP Client Name toMainOffice 90 Branch office Ss SES Oy 7 Q lt X lanp x 9 bs 763 Bagal Basic settings Usemame BranchOffice P
54. VER iscecssietscis sited capa cavnseddcrpaitec canal ecavnneddaareacde civ escaceee de 64 TU rien E EERE EREE EEE 65 PN stb niet E E E ttnabe Saeed eat natapemmeveneaalls 65 Ping EXON G crt cesta cc seat ars E E sec rx seca E E 65 Dynamic DNS a teiccntvnsavsducctctaatvsanersecuncntewcantwads wal ten develdiegunnteoctacentmeandaie 66 Add Dynamic DNS Settings 00 ce cceeeeeeteeee inin nin Keen K ANENE RESEN 66 BACKUP sisessitessvsiiievinesssemadvuvetiasvnervaa tive vanvcensvaandervanceseeiiarvesstescesvecdanivs 67 Exporting the DFL 700 s Configuration 0 ccceecceeceeeeeeeeeeeeteneeeereneeeeees 67 Restoring the DFL 700 s Configuration 0 cccceceeeeeeeeteeeeeeteieeeeettieeeeees 67 Restart ReSet ccsseeseeeeeeeeseeeeeeeeeeeeeeaeeeeeeeeeeegeeeeseeeseesseesteeeseeees 68 Restoring system settings to factory defaults 0 0 0 eeeeeeeeeeeeeeeeeneeeeeees 69 Upgrade ss acetic pe eee ct dee anaes aoc onacareueneekcneacomncae 70 Upgrade Firmware cnni ae naa KEENE EERE 70 Upgrade IDS Signature database ee ceccceeceeeeeeeeeeeeeeeeeeeteeeeeeeeenaeens 70 Eeee LBs eee E eae ene io Sure het bo nO Peano on Ser eran atin oreeeeISor 71 SYSTEM areenan eara a EA O EE E GA 71 EC O E E ned caetereavieteenn esti veniam eeedenans 72 VIP E resis oenasedivavaadipnaativn adnate leedaacneesaanives 73 10 a a 01 0 9 ee 74 DACP SOVON siisistscsccsasstansassinarsaanvtasveatievisaa teas Enana rana 75 MISGES oiean a este
55. YPN Tunnels Add IPsec tunnel Name toMainOffice Branch office Local Net 192 168 4 0 24 Authentication PSK Pre Shared Key PSK mennun Retype PSK Re a PSK 1234567890 Do not use this as your PSK Retype PSK 1234567890 80 LAN to LAN tunnel Remote Net 192 168 1 0 24 Remote Gateway 194 0 2 20 The gateway can be a numerical IP addr S name or range of IP addr for roaming NATed gateways Route Automatically add a route for the remote network Proxy ARP 7 Publish remote network on all interfaces via Proxy ARP _ C Pass username and password to peer via IKE Auth if the remote gateway IKE Auth client _ requires it Auth Username gt Auth Password Select Tunnel type LAN to LAN tunnel Remote Net 192 168 1 0 24 Remote Gateway 194 0 2 20 Enable Automatically add a route for the remote network Click Apply 3 Setup policies for the new tunnel Firewall gt Policy Firewall Policy Edit global policy parameters Fragments oO Drop all fragmented packets Minimum TTL 3 YPN Allow all YPN traffic internal gt PN VPN gt internal and YPN gt YPN Click Global policy parameters Enable Allow all VPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 4 Click Activate and wait for the firewall to restart Changes Discard Settings for Main office 1 Setup interfaces System gt Interfaces WAN IP
56. able policy lists Step 2 Click on the Edit link corresponding to the rule you want to delete Step 3 Enable the Delete policy checkbox Click the Apply button below to apply the changes or click Cancel to discard changes Configure Intrusion Detection Follow these steps to configure IDS on a policy Step 1 Choose the policy you would like to have IDS on Step 2 Click on the Edit link corresponding to the rule you want to configure Step 3 Enable the Intrusion Detection Prevention checkbox Step 4 Choose Inspection Only from the mode drop down list Step 5 Enable the alerting checkbox for e mail alerting Click the Apply button below to apply the changes or click Cancel to discard changes 32 Configure Intrusion Prevention Follow these steps to configure IDP on a policy Step 1 Choose the policy you would like have IDP on Step 2 Click on the Edit link corresponding to the rule you want to configure Step 3 Enable the Intrusion Detection Prevention checkbox Step 4 Choose Prevention from the mode drop down list Step 5 Enable the alerting checkbox for e mail alerting Click the Apply button below to apply the changes or click Cancel to discard changes Port mapping Virtual Servers The Port mapping Virtual Servers configuration section is where you can configure virtual servers such as a LAN Web server on the LAN or DMZ Interfaces to be accessible through the WAN One may also regulate how bandwidth manag
57. ange Administrative User PaSSWOIG ccccccceeeerteeeeseeneeeeteeneeeteenaees 37 Delete Administrative USer cccccccesecceeceeeeeeeeeeeaeeeeeteeeseeneeaeeeeeeeeeneees 38 MISGPS serana ae fecettonst2eseasstbtovacsstacmisfovsaiueatishetdsssetuetaustenae Gases 39 The DFL 700 RADIUS Suppott cccccccceceeeeeceeeceeeeeeeeeeeeceaaeeeeeeeeenennaees 39 Enable User Authentication via HTTP HTTPS 40 Enable RADIUS SUPPO ccc iccsiccctheasvccitevceecadidateeeravseeredeeeeesehetecenanscer teri 40 Ada USET cesse ce eect featene teed ester sachebvaneadavec A E EE 41 Change User Password izsiic viteccenvit seg keanaan EE EAE AAEE 41 Delete USET irria a ii a aa a 42 SCNSGUIES perne aa aaan n 43 Add new recurring schedule sssssssseerrreerrrrisrerrnerinnasternnennnnnstananerannaaean 43 Add new one time SChedUIe cece ceeeeecccee ce ceeeeeeeeeeeceeeeeeeseeennaeeeeeeeeees 44 EIVICES oee tear tear enis E dace frag cienet aaece tact eert teach cenretees 45 Adding TCP UDP or TCP UDP ServiCe cecceceececeeeeeeeeeeeneeeeeeeeeneees 45 Adding IP Protocol siiis2icncietetdeies tinea bac iad eee ential 46 Grouping SENVICES cercorereriner iat a an E EEE EE E 46 Protocol independent settings aassseeersseessrreererrrerenresrernesrennasnnnnennnneatan 47 VPN eime e a ec id ees oe Ne eee eee Ooi eto estate 48 Introduction to IPS C ceceecceccceceeeeeeeeeeeeaeeeeeeeeesecneaeeeeeeeeeseneeaeeeeeeeeneee
58. aracters and _ No other special characters or spaces are allowed Step 3 Specify the Client IP Pool this should be a range of unused IP s on the LAN interface that will be handed out to L2TP or PPTP Clients Step 4 If you are using IPSec encryption for the L2TP or PPTP Client choose authentication type either PSK Pre shared Key or Certificate based Click the Apply button below to apply the change or click Cancel to discard changes VPN Advanced Settings Advanced settings for a VPN tunnel is used when the user needs to change some characteristics of the tunnel to for example try to connect to a third party VPN Gateway The different settings per tunnel are Limit MTU With this setting it is possible to limit the MTU Max Transferable Unit of the VPN tunnel IKE Mode Specify if Main mode IKE or Aggressive Mode IKE should be used when establishing outbound VPN Tunnels Inbound main mode connections will always be allowed Inbound aggressive mode connections will only be allowed if this setting is set to aggressive mode IKE DH Group Here it is possible to configure the Diffie Hellman group to 1 modp 768 bit 2 modp 1024 bit or 5 modp 1536 bit PFS Perfect Forward Secrecy If PFS Perfect Forwarding Secrecy is enabled a new Diffie Hellman exchange is performed for each phase 2 negotiation While this is slower it makes sure that no keys are dependent on any other previously used keys no keys ar
59. assword peaa Retype pvc Password Interface IP Blank get IP from server Remote Gateway 1940 2 20 Remote Net 192 168 1 0 24 Proxy ARP Publish remote network on all interfaces via Proxy ARP O Use primary DNS server from tunnel as primary DNS C Use secondary DNS server from tunnel as secondary DNS Hint Use Servers gt DNS Relayer to easily make DNS servers available to ir clients C Dial on demand Username BranchOffice Password 1234567890 Note You should use a password that is hard to guess Retype password 1234567890 Interface IP leave blank Remote gateway 194 0 2 20 Remote net 192 168 1 0 24 Dial on demand leave unchecked Authentication Protocol 7 No auth C PAP C CHAP 0O MSCHAP MPPE encryption possible NI MSCHAPy 2 MMPE encryption possible Under authentication only MSCHAPv2 should be checked MPPE encryption N None C 40 bit C 56 bit C 128 bit Encryption is only possible when using MSCHAP or MSCHAP v2 as authenti protoco Use IPsec encryption PSK Pre Shared Key Key ie Retype key sae Certificate based Under MPPE encryption only None should be checked Check Use IPsec encryption Enter key 1234567890 Note You should use a key that is hard to guess Retype key 1234567890 Click Apply 3 Setup policies for the new tunnel Firewall gt Policy Click Global policy parameters Enable Allow all VPN traffic internal gt
60. ave the DFL 700 filters only information found in packet headers such as IP TCP UDP or ICMP headers In some situations though filtering only header data is not sufficient The FTP protocol for instance includes IP address and port information in the protocol payload In these cases the firewall needs to be able to examine the payload data and carry out appropriate actions The DFL 700 provides this functionality using Application Layer Gateways ALG To use an Application Layer Gateway the appropriate Application Layer Gateway definition is selected in the dropdown menu The selected Application Layer Gateway will thus manage network traffic that matches the policy using this service Currently the DFL 700 supports two Application Layer Gateways one is used to manage the FTP protocol and the other one is a HTTP Content Filtering ALG For detailed information about how to configure the HTTP Application Layer Gateway please see the Content Filtering chapter VPN Introduction to IPSec This chapter introduces IPSec the method or rather set of methods used to provide VPN functionality IPSec Internet Protocol Security is a set of protocols defined by the IETF Internet Engineering Task Force to provide IP security at the network layer An IPSec based VPN such as that of the DFL 700 is made up of two basic parts e Internet Key Exchange security protocol IKE e IPSec protocol ESP The first part IKE is the initial negot
61. ays to create a VPN tunnel that connects the branch office network to the main office network DFL 700 Firewall The example shows an IPSec VPN between two internal networks One may also create VPN tunnels between an internal Main Office network behind one VPN gateway and a DMZ Internal Network network behind another or between two remote DMZ networks The networks at the ends of the VPN tunnel are selected when you configure the VPN policy OF Creating a LAN to LAN IPSec VPN Tunnel Follow these steps to add a LAN to LAN Tunnel Step 1 Go to Firewall VPN and choose Add new under IPSec Step 2 Enter a Name for the new tunnel in the name field The name can contain numbers 0 9 and upper and lower case letters A Z a z and the special characters and _ No other special characters and spaces are allowed Step 3 Specify your local network or your side of the tunnel for example 192 168 1 0 255 255 255 0 in the Local Net field Step 4 Choose authentication type either PSK Pre shared Key or Certificate based If you choose PSK make sure both firewalls use exactly the same PSK Step 5 For Tunnel Type choose LAN to LAN tunnel and specify the network behind the other DFL 700 as Remote Net Also specify the external IP of the other DFL 700 either an IP ora DNS name Click the Apply button below to apply the changes or click Cancel to discard changes Repeat these steps with the firewall on the other site VPN between
62. ble based on active users and protects the DHCP server to some degree Note There can only be one DHCP Server or DHCP Relay configured per interface 62 Enable DHCP Server To enable the DHCP Server on an interface click on Servers in the menu bar and then click DHCP Server below it Follow these steps to enable the DHCP Server on the LAN interface Step 1 Choose the LAN interface from the Available interfaces list Step 2 Enable by checking the Use built in DHCP Server box Step 3 Fill in the IP Span the start and end IP for the range of IP addresses that the DFL 700 can assign Step 4 Fill in the DNS servers the DHCP server will assign to the clients at least one should be provided If the DNS Relay function is configured the DHCP server will assign those addresses Step 5 Optionally type in the WINS servers the DHCP server will assign to the clients Step 6 Optionally type in the domain that the DHCP server will assign to the clients Step 7 Choose the length of time the DHCP server will give out leases before the client has to renew them Click the Apply button below to apply the settings or click Cancel to discard changes Enable DHCP Relay To enable the DHCP Relay on an interface click on Servers in the menu bar and then click DHCP Server below it Follow these steps to enable the DHCP Relay on the LAN interface Step 1 Choose the LAN interface from the Available interfaces list Step 2 Enable by checkin
63. ble parties of the malicious attack the IDS will send e mails to the system administrators if e mail alerting is enabled and configured D Link updates the attack database periodically There are two modes that can be configured either Inspection Only or Prevention Inspection Only will only inspect the traffic and if the DFL 700 detects anything it will log e mail an alert if configured and pass on the traffic If Prevention is used the traffic will be dropped and logged and if configured an e mail alert will be sent Traffic Shaping The simplest way to obtain quality of service in a network seen from a security as well as a functionality perspective is to have the components in the network not the applications be responsible for network traffic control in well defined choke points Traffic shaping works by measuring and queuing IP packets in transit with respect to a number of configurable parameters Differentiated rate limits and traffic guarantees based on source destination and protocol parameters can be created much the same way firewall policies are implemented There are three different priorities when configuring the traffic shaping Normal High and Critical Limit works by limiting the inbound and outbound traffic to the specified speed This is the maximum bandwidth that can be used by traffic using this policy Note however that if you have other policies using limit which in total is more then your total internet co
64. ce DMZ bg Network 80 80 80 82 Subnet Mask 255 255 255 255 1 host 32 v Gateway T Network is behind remote gateway Proxy ARP V Publish network on all other interfaces via Proxy ARP Additional IP C Additional firewall IP address that hosts can use as gateway Static Route Configuration for a Server on the DMZ Navigate to the SYSTEM tab then the ROUTING page of the Web based configuration Select the Add New link to create the second static route Select the Interface that the Internal Server is connected to LAN or DMZ Specify the Public IP to be forwarded in the Network field The Subnet Mask should be set to 255 255 255 255 1 host Enable the Proxy ARP feature The above static route configuration explicitly defines the interface that the additional Public IP address should be forwarded to NOTE Be sure to enable Proxy ARP for both routes or the Firewall will not forward traffic destined for the specified Public IP addresses to Internal servers Configure Port Mapping Virtual Server Rules for LAN Server Port Mapping Virtual Servers Edit new mapping Name Source Nets Blank everyone Users Groups Any Any authenticated 80 80 80 81 Blank PWAN nterface IP address Custom source ports Gestinabon ports pass to part and up Blank no change Pass To 192 168 2 50 Schedule Always Virtual Server Configuration for a Server on the LAN Navigate to the FIREWALL
65. ce that the PPTP tunnel runs over Your ISP should supply this information L2TP tunnel parameters Usemame Password Retype Password L2TP Server IP Physical interface parameters DHCP automatic configuration Everything is automatic O Static IP manual configuration Your ISP should provide this information to you IP Address Subnet Mask Gateway IP This may or may not be necessary depending on the ISP Before L2TP can be used to connect to your ISP the physical WAN interface parameters must be input You can use either DHCP or Static IP depending on the type of ISP used Your ISP should supply this information If using static IP this information needs to be filled in e IP Address The IP address of the WAN interface This IP is used to connect to the L2TP server e Subnet Mask Size of the external network e Gateway IP Specifies the IP address of the default gateway used to access the Internet Contact your ISP if you are unsure of the necessity of this information WAN Interface Settings Using BigPond The ISP Telstra BigPond uses BigPond for authentication the IP is assigned with DHCP e Username The login or username supplied to you by your ISP e Password The password supplied to you by your ISP Traffic Shaping When Traffic Shaping is enabled and the correct maximum up and downstream bandwidth is specified it s possible to control whichever policies have
66. ck OK 112 Settings for Main office 1 Setup interfaces System gt Interfaces WAN IP 194 0 2 20 LAN IP 192 168 1 1 Subnet mask 255 255 255 0 2 Setup L2TP server Firewall gt VPN Under L2TP PPTP Server click Add new L2TP server Name the server I2tpServer Leave Outer IP and Inner IP blank Set client IP pool to 192 168 1 100 192 168 1 199 Check Proxy ARP dynamically added routes Check Use unit s own DNS relayer addresses Leave WINS settings blank Under authentication MSCHAPv2 should be the only checked option Under MPPE encryption None should be the only checked option Check the Use IPSec encryption box Enter the pre shared key 1234567890 and retype same pre shared key Click Apply 3 Setup policies for the new tunnel Firewall gt Policy Click Global policy parameters Enable Allow all VPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 4 Set up authentication source Firewall gt Users Select Local database Click Apply 5 Add a new user Firewall gt Users Under Users in local database click Add new Name the new user HomeUser Enter password 1234567890 Retype password 1234567890 Leave static client IP empty could also be set to eg 192 168 1 200 If no IP is set here the IP pool from the PPTP server settings are used Click Apply 6 Click Activate and wait for the firewall to restart This example will allow all traffic from the client to the main office network To get a m
67. client and an internal network In the following example users can connect to the main office internal network from anywhere on the Internet Communication between the client and the internal network takes place in an encrypted VPN tunnel that connects the DFL 700 and the roaming users across the Internet The example shows a VPN between a roaming VPN client and the internal network but you can also create a VPN tunnel that uses the DMZ network The networks at the ends of the VPN tunnel are selected when you configure the VPN policy Creating a Roaming Users IPSec Tunnel Follow these steps to add a roaming user tunnel Internal Network DFL 700 Firewall eo Roaming VPN Client Step 1 Go to Firewall and VPN and choose Add new under IPSec Step 2 Enter a Name for the new tunnel in the name field The name can contain numbers 0 9 and upper and lower case letters A Z a z and the special characters and _ No other special characters and spaces are allowed Step 3 Specify your local network or your side of the tunnel for example 192 168 1 0 255 255 255 0 in the Local Net field This is the network your roaming VPN clients should be allowed to connect to Step 4 Choose authentication type either PSK Pre shared Key or Certificate based If you choose PSK make sure the clients use exactly the same PSK Step 5 For Tunnel Type choose Roaming User Click the Apply button below to apply the changes or click Cancel t
68. configured for each interface that this filtering should be applied to utilizing the HTTP ALG This will require a rework of the default outbound policy to eliminate the chance of unfiltered HTTP traffic passing through the Firewall The idea is to remove the most general allow rule and configure rules to allow essential services such as DNS as well as HTTP to pass the Firewall Edit allow_standard rule 4 Name allow_standard Position 4 Moves before given position Blank last Action Allow x Source Nets Users Groups Any Any authenticated Destination Nets Users Groups Any authenticated Leave source and or destination blank to match everything Service All v Custom source ports Blank any port destination ports Schedule Always iv Intrusion Detection 7 Prevention Mode Alerting Enable IDS IDP alerting via email for this rule y Delete this rule O O Apply Cancel Help 132 To disable the default general allow all rule Navigate to the Firewall tab Policy section of the web administration Select the appropriate policy based on desired effect LAN gt WAN or DMZ gt WAN Click Edit next to the default allow all rule Check the check box next to delete this rule Click Apply Edit new rule Name dns_out Position Moves before given position Blank last Action Allow y Source Nets Users Groups Any Any aut
69. cote z O O O Apply Cancel Help 60 Edit the URL Global Blacklist Follow these steps to A e D Link add or remove a URL Building Networks for People DFL 700 Network Security Firewall Step 1 Navigate to Firewall Content Filtering and choose Edit global URL Servers Tools Status Help HTTP Content Filtering Blacklist Edit Destination URL Global Blacklist f n j FOnSy The URL blacklist bi dto d t lete sites to file ty by ext to URLs with Step 2 Add or edita cantain words them URL that should be Portmapping Blank lines are ignored Lines beginning with are also ignored filtered and blocked File extensions may also be defined to block download of Schedules specified file types a Deny access to potentially dangerous file types Malicious executables can be downloaded by exploits com scr cpl pi JERONE C ick the App l y services 4 alicious scripts can be downloaded by exploits vbd button below to apply VPN ee the changes or click ria Cancel to discard ed changes how ceneno Shell scraps can contain executables and invoke nearly any command O 00 Apply Cancel Help Note For HTTP URL filtering to work all HTTP traffic needs to go through a policy using a service with the HTTP ALG A pre defined HTTP outbound TCP All gt 80 ALG http cf max 100 service is
70. ction wizard window opens up Click next New Connection Wizard Network Connection Type What do you want to do Connect to the Internet Connect to the Intemet so you can browse the Web and read email Connect to a business network using dial up or VPN so you can work from home a field office or another location Set up a home or small office network Connect to an existing home or small office network or set up a new one O Set up an advanced connection Connect directly to another computer using your serial parallel or infrared port or set up this computer so that other computers can connect to it 5 Select Connect to the network at my workplace and click Next 102 New Connection Wizard Network Connection How do you want to connect to the network at your workplace Create the following connection Dial up connection Connect using a modem and a regular phone line or an Integrated Services Digital Network ISDN phone line Connect to the network using a virtual private network VPN connection over the Intemet 6 Select Virtual Private Network connection and click Next New Connection Wizard Connection Name Specify a name for this connection to your workplace Type a name for this connection in the following box Company Name MainOffice For example you could type the name of your workplace or the name of a server you will connect to 7 Name the connection Main
71. ddress 2 optional The requests will be relayed to the DNS servers that this unit itself uses O O O Apply Cancel Help Enable DNS Relayer Follow these steps to enable the DNS Relayer Step 1 Enable by checking the Enable DNS Relayer box Step 2 Enter the IP numbers that the DFL 700 should listen for DNS queries on Note If Use address of LAN interface is checked you do not have to enter an IP in IP Address 1 as the firewall will know what address to use Click the Apply button below to apply the settings or click Cancel to discard changes Disable DNS Relayer Follow these steps to disable the DNS Relayer Step 1 Disable by un checking the Enable DNS Relayer box Click the Apply button below to apply the settings or click Cancel to discard changes 64 Tools Ping Click on Tools in the menu bar and then click Ping below it This tool is used to send a specified number of ICMP Echo Request packets to a given destination All packets are sent in immediate succession rather than one per second This method is the best suited for diagnosing connectivity problems Ping IP Address Number of packets E Packet size 64 v O O O Apply Cancel Help e IP Address Target IP to send the ICMP Echo Requests to e Number of packets Number of ICMP Echo Request packets to send up to 10 e Packet size Size of the packet to send between 32 and 1500 bytes Ping Example In this
72. e RADIUS server Enable User Authentication via HTTP HTTPS Follow these steps to enable User Authentication Step 1 Enable the checkbox for User Authentication Enable User Authentication via HTTP HTTPS HTTP Security HTTP as well as HTTPS Step 2 Specify if HTTP and HTTPS only HTTPS or only HTTPS should Ide Timeout Thou E be used for the login Step 3 Specify the idle timeout the time a user can be idle before being logged out by the firewall Step 4 Choose new ports for the web based management GUI to listen on since enabling user authentication requires the default ports for user login purposes 80 and 443 Click the Apply button below to apply the settings or click Cancel to discard changes Enable RADIUS Support Follow these steps to enable RADIUS M Enable RADIUS Support support Primary Server 192168110 port 1812 Step 1 Enable the checkbox for 5 ee Mode CHAP RADIUS Support Shared Secret gt Step 2 Enter information for up to Retype Secret two RADIUS servers RADIUS retry 2 seconds Step 3 Specify which mode to use PAP or CHAP Step 3 Specify the shared secret for this connection Click the Apply button below to apply the settings or click Cancel to discard changes 40 Add User Follow these steps to add a new user Step 1 Click on add corresponding to the type of user you would like to add Admin or Read only Step 2 Fill in User name make sure you are not trying
73. e extracted from the same initial keying material PFS is used to ensure that in the unlikely event an encryption key is compromised no subsequent keys could be derived from that compromised key NAT Traversal Here it is possible to configure how the NAT Traversal code should behave Disabled The firewall will not send the necessary Vendor ID s to indicate NAT T support when setting up the tunnel On if supported and need NAT Will only use NAT T if one of the VPN gateways is behind a NAT device On if supported Always tries to use NAT T when setting up the tunnel Keepalives No keepalives Keep alive is disabled Automatic keepalives The firewall will send ICMP pings to IP Addresses automatically discovered from the VPN Tunnel settings Manually configured IP addresses Configure the source and destination IP addresses used when sending the ICMP pings 56 Proposal Lists To agree on the VPN connection parameters a negotiation process is performed As the result of the negotiations the IKE and IPSec security associations SA are established As the name implies a proposal is the starting point for the negotiation A proposal defines encryption parameters for instance encryption algorithm life times etc that the VPN gateway supports There are two types of proposals IKE proposals and IPSec proposals IKE proposals are used during IKE Phase 1 IKE Security Negotiation while IPSec proposals are using during IK
74. e secure LAN to LAN VPN solution section of this user guide LAN to LAN VPN using PPTP Main office Branch office ae z s 20 pf i 795 92 76 ak 76g 8 7 7 Uo 7 i jea N Z g AN AS ee th af 4 c Y xO La SS PSR P in 792 92 7 768 Ky 63 5 74 7 3 oy y2 Settings for Branch office 1 Setup interfaces System gt Interfaces WAN IP 194 0 2 10 LAN IP 192 168 4 1 Subnet mask 255 255 255 0 2 Setup PPTP client Firewall gt VPN Under PPTP L2TP clients click Add new PPTP client Name the tunnel toMainOffice L2TP PPTP Clients Add PPTP Client Name toMainOffice 84 Basic settings Username Password Retype Password Interface IP Remote Gateway Remote Net Proxy ARP C Dial on demand BranchOffice XXXXXXXXXX XXXXXXXXXX Blank get IP from server 194 0 2 20 192 168 1 0 24 C Publish remote network on all interfaces via Proxy ARP Oo Use primary DNS server from tunnel as primary DNS C Use secondary DNS server from tunnel as secondary DNS Hint Us clients ervers gt DNS Relayer to easily make DNS servers available to internal Username BranchOffice Password 1234567890 Note You should use a password that is hard to guess Retype password 1234567890 Interface IP leave blank Remote gateway 194 0 2 20 Remote net 192 168 1 0 24 Dial on demand leave unchecked Authentication Protocol 7 No auth 7 PA
75. e shipped to the customer via UPS Ground or any common carrier selected by D Link with shipping charges prepaid Expedited shipping is available if shipping charges are prepaid by the customer and upon request D Link may reject or return any product that is not packaged and shipped in strict compliance with the foregoing requirements or for which an RMA number is not visible from the outside of the package The product owner agrees to pay D Link s reasonable handling and return shipping charges for any product that is not packaged and shipped in accordance with the foregoing requirements or that is determined by D Link not to be defective or non conforming What Is Not Covered This limited warranty provided by D Link does not cover Products if in D Link s judgment have been subjected to abuse accident alteration modification tampering negligence misuse faulty installation lack of reasonable care repair or service in any way that is not contemplated in the documentation for the product or if the model or serial number has been altered tampered with defaced or removed Initial installation installation and removal of the product for repair and shipping costs Operational adjustments covered in the operating manual for the product and normal maintenance Damage that occurs in shipment due to act of God failures due to power surge and cosmetic damage Any hardware software firmware or other products or services provided by anyone
76. ement traffic shaping is applied to traffic flowing through the WAN interface of the firewall to the LAN or DMZ It is also possible to use Intrusion Detection Prevention on Port mapped services These are applied in the same way as with policies See the previous chapter for more information Mappings are read from top to bottom and the first matching mapping is carried out Add a new mapping Follow these steps to add a new mapping on the WAN interface Step 1 Click on the Add new link Step 2 Fill in the following values Name Specifies a symbolic name for the rule This name is used mainly as a rule reference in log data and for easy reference in the policy list Source Nets Specify the source networks leave blank for everyone 0 0 0 0 0 Source Users Groups Specifies if an authenticated username is needed for this mapping to match Either make a list of usernames separated by a comma or write Any for any authenticated user If it is left blank there is no need for authentication for the policy Destination IP Leave empty to use the WAN IP of the firewall or enter an additional IP address to be forwarded to the specified Pass To address Service Either choose a predefined service from the dropdown menu or make a custom service Pass To The IP of the server that the traffic should be passed to Schedule Choose which schedule should be used for this mapping to match Choose Always for no scheduling Step 4 If
77. en the File Download pop up window appears choose the destination place in which to save the exported file The Administrator may choose to rename the file if preferred Restoring the DFL 700 s Configuration Follow these steps to restore the configuration Step 1 Under the Tools menu and the Backup section click on the Browse button next to the empty field When the Choose File pop up window appears select the file that contains the saved firewall settings click OK Step 2 Click Upload Configuration to import the file into the firewall Restart Reset D Link Building Networks for People DFL 700 Network Security Firewall System Firewall Servers Status Help e m Upgrade Restart Reset Restart Quick restart reset interfaces and re read configuration C Full restart restart from power on state Restart unit Reset to factory defaults You can restore the unit to factory defaults This means that all configuration parameters will be wiped and all firmware upgrades removed On the nest start up its LAN IP address will be 192 168 1 1 and the web GUI will begin with the setup wizard It will not accept connections on any interface other than the LAN interface Reset to Factory Defaults Restarting the DFL 700 Follow these steps to restart the DFL 700 Step 1 Choose if you want to do a quick or full restart Step 2 Click Restart Unit and the un
78. ess of the default gateway used to access the Internet Primary and Secondary DNS Server The IP addresses of your DNS servers only the Primary DNS is required WAN Interface Settings Using DHCP If you are using DHCP there is no need to complete any fields Interface Settings Edit settings of the WAN interface Change WAN Type DHCP Regular ethernet connection with DHCP assigned IP addresses is used in many DSL and cable modem networks Everything is automatic 16 WAN Interface Settings Using PPPoE Use the following procedure to configure the DFL 700_ external interface to use PPPoE Point to Point Protocol over Ethernet This configuration is required if your ISP uses PPPoE to assign the IP address of the external interface You will have to fill in the username and password provided to you by your ISP e Username The login or username supplied to you by your ISP e Password The Interface Settings Edit settings of the WAN interface Change WAN Type PPPoE PPP over Ethernet connections are used in many DSL and cable modem networks After authenticating everything is automatic Usemame Password Retype Password Service Name Some ISPs require the Service Name to be filled out Most PPPoE services provide DNS server information A few do not If this is the case you can fill out their IP addresses yourself Primary DNS Server optional Secondary DNS Server optional
79. et with the destination port being one of 80 81 82 90 91 92 or 95 and the source port being in the range 1024 65535 will match this service Follow these steps to add a TCP UDP or TCP UDP service Step 1 Go to Firewall and Service and choose add new Step 2 Enter a Name for the service in the name field This name will appear in the service list when you add a new policy The name can contain numbers 0 9 and upper and lower case letters A Z a z and the special characters and _ No other special characters and spaces are allowed Step 3 Select TCP UDP Service Step 4 Select the protocol TCP UDP or both TCP UDP used by the service Step 5 Specify a source port or range for this service by typing in the low and high port numbers Enter 0 65535 for all ports or a single port like 80 for only one source port Step 6 Specify a destination port or range for this service by typing in the low and high port numbers Enter 0 65535 for all ports or a single port like 80 for only one destination port Step 7 Enable the SYN Relay checkbox if you want to protect the destination from SYN flood attacks Click the Apply button below to apply the changes or click Cancel to discard changes Adding IP Protocol When the type of the service is IP Protocol an IP protocol number may be specified in the text field To have the service match the GRE protocol for example the IP protocol should be specified as 47 A list of some def
80. ettings or click Cancel to discard changes 66 Backup Click on Tools in the menu bar and then click Backup below it Here an administrator can backup and restore the configuration The configuration file stores system settings IP addresses of the firewall s network interfaces address table service table IPSec settings port mapping and policies When the configuration process is completed a system administrator can download the configuration file onto a local disc as a backup System Administrators D Link Building Networks for People DynDNS Reset Upgrade ai DFL 700 Network Security Firewall System _ Firewall Servers Backup 7 Restore Backup unit s configuration By clicking Download configuration you will receive a package file containing the unit s entire configuration This can later be uploaded to the unit to restore the configuration Download configuration Restore unit s configuration To restore an old configuration you can upload a previously downloaded backup file The unit wil immediately activate the uploaded configuration Browse Upload configuration can restore the firewall s configuration file with the one stored on disc Exporting the DFL 700 s Configuration Follow these steps to export the configuration Step 1 Under the Tools menu and the Backup section click on the Download configuration button Step 2 Wh
81. example the IP Address is 192 168 10 1 the Number of packets is five After clicking on Apply the firewall will start to send the ICMP Echo Requests to the specified IP After a few seconds the result will be displayed In this example only four out of five packets were received back a 20 packet loss and the average time for the packets to travel to and from the specified IP was 57 ms Results of pinging 192 168 10 1 Seq Roundtrip TTL 1 50 ms 236 2 70 ms 236 3 60 ms 236 5 50 ms 236 5 packets transmitted 4 packets received 20 packet loss Round trip time average 57 ms Dynamic DNS The Dynamic DNS requires Dynamic DNS Service allows you to alias a dynamic IP address to a static hostname allowing your device to be more easily accessed by a specific name When this function is enabled the IP address in Dynamic DNS Server will be automatically updated with the new IP address provided by ISP Click DynDNS in the Tools menu to enter Dynamic DNS configuration The firewall provides a list of a few predefined DynDNS service providers Users must register with one of these providers before trying to use this function Add Dynamic DNS Settings Follow these steps to enable Dynamic DNS Step 1 Go to Tools and DynDNS Step 2 Choose what Dynamic DNS service you would like to use and fill in the required information username and password in all cases and domains in all but cjb net Click the Apply button below to apply the s
82. executables can be downloaded by exploits exe SCT cpl pif com probably not a good idea given the com TLD voo Apply Cancel Help Navigate to the Firewall tab Content Filtering section of the web administration Click on Edit URL Black List to modify or append the contents of the filtering database To block an entire domain and all sub domains use the following syntax casino com Blocks access to the domain casino com casino com Blocks access to all sub domains under casino com To block specific file types from download through HTTP use the following syntax exe Blocks executable downloads Once finished editing the Blacklist click Apply to save changes or Cancel to clear Additional Content Filters The Firewall can also filter Java Applets Java VB Script ActiveX objects and or cookies from reaching the PCs behind the NetDefend Firewall These content categories do not require configuration other than enable or disable Active content handling Strip Activex objects including Flash Strip Java applets Strip Javascript VB Script Block Cookies Navigate to the Firewall tab Content Filtering section of the web administration Click the check box next to each filter you would like to enable Once finished selecting additional filters click Apply to save changes or Cancel to clear HTTP Rule using the HTTP ALG Now that the content to be filtered has been decided on a rule needs to be
83. g the Relay DHCP Requests to other DHCP server box Step 3 Fill in the IP of the DHCP Server note that it should be on another interface than where the DHCP request is coming from i e a server on the DMZ Click the Apply button below to apply the settings or click Cancel to discard changes Disable DHCP Server Relay To disable the DHCP Server on an interface click on Servers in the menu bar and then click DHCP Server below it Select the interface on which you wish to disable the DHCP server or relayer Follow these steps to disable the DHCP Server or Relayer on the LAN interface Step 1 Choose the LAN interface from the Available interfaces list Step 2 Disable by checking the No DHCP processing box Click the Apply button below to apply the settings or click Cancel to discard changes DNS Relay Settings Click on Servers in the menu bar and then click DNS Relay below it The DFL 700 contains a DNS Relay function that can be configured to relay DNS queries from the internal LAN to the DNS servers used by the firewall itself D Link Building Networks for People DFL 700 Network Security Firewall x System Firewall Tools Status Help DNS Relayer Settings DHCP Server The DNS Relayer can provide DNS service on up to two fixed local IP addresses These can be used as DNS servers by computers on the LAN IV Enable DNS Relayer IP Address 1 M Use address of LAN interface IP A
84. gate to the Firewall tab Policy section of the web administration Select the appropriate policy based on desired effect LAN gt WAN or DMZ gt WAN Click Add New at the bottom of the list Give the rule a friendly name such as http_cntnt_filtr Position does not matter leave blank or choose a position Choose Allow as the Action For service choose http_outbound already configured to use the HTTP ALG Select a schedule and enable IDS IDP if desired Click Apply to save the changes or click Cancel to disregard After clicking Apply click the Activate button on the left hand menu Select Activate Changes Now to save the configuration to flash and restart When the firewall has finished restarting the HTTP Content Filtering Function will be enabled and active Keep in mind that depending on the type of activities your LAN participates in more services may need to be specified as rules in the Firewall Policy configuration to allow said services to pass the firewall The steps should be similar to the DNS and HTTP configuration if there is a default service configured Custom services can also be created to accommodate most any service needed to run through the firewall 134 Warranty Subject to the terms and conditions set forth herein D Link Systems Inc D Link provides this Limited warranty for its product only to the person or entity that originally purchased the product from D Link or its authorized reseller or d
85. gotiated When LCP and NCP negotiation is done IP datagram s can be sent over the link Authentication Protocols PPP supports different authentication protocols PAP CHAP MS CHAP v1 and MSCHAP v2 The authentication protocol to be used is decided during LCP negotiation PAP PAP Password Authentication Protocol is a simple plaintext authentication scheme which means that both user name and password are sent over the tunnel plaintext PAP is therefore not considered a secure authentication protocol CHAP CHAP Challenge Handshake Authentication Protocol is a challenge response authentication protocol specified in RFC 1994 CHAP uses an MD5 one way encryption scheme to hash the response to a challenge issued by the DFL 700 CHAP is superior to PAP in that the password is never sent over the link Instead the password is used to create the one way MD5 hash This does however mean that CHAP requires passwords to be stored in a reversibly encrypted form MS CHAP v1 MS CHAP v1 Microsoft Challenge Handshake Authentication Protocol version 1 is similar to CHAP the main difference is that with MS CHAP v1 the password only needs to be stored as an MD4 hash instead of a reversibly encrypted form Another difference is that MSCHAP v1 uses MD4 Hashing as opposed to MD5 used in CHAP MS CHAP v2 MS CHAP v2 Microsoft Challenge Handshake Authentication Protocol version 1 is more secure then MS CHAP v1 as it provides two way authentication
86. henticated Destination Nets Users Groups Any authenticated Service Custom source ports Blank any port destination ports Schedule Always Intrusion Detection Prevention Mode Alerting Enable IDS IDP alerting via email for this rule O 9 Apply Cancel Help To allow DNS queries to pass through Navigate to the Firewall tab Policy section of the web administration Select the appropriate policy based on desired effect LAN gt WAN or DMZ gt WAN Click Add New at the bottom of the list Give the rule a friendly name such as dns_out Position does not matter leave blank or choose a position Choose Allow as the Action For service choose dns_all Select a schedule and enable IDS IDP if desired Click Apply to save the changes or click Cancel to disregard Edit new rule Name http_cntnt_fltr Position 1 Moves before given position Blank last Action Allow x Source Nets Users Groups Any Any authenticated Destination Nets Users Groups ny authenticated Leave source and or destination blank to match Service http outbound Custom source ports Blank any port destination ports Schedule Always v CI Intrusion Detection 7 Prevention Mode Alerting Enable IDS IDP alerting via email for this rule O O Apply Cancel Help To configure the HTTP Content Filtering rule Navi
87. iation phase where the two VPN endpoints agree on which methods will be used to provide security for the underlying IP traffic Furthermore IKE is used to manage connections by defining a set of Security Associations SA for each connection Each SA is unidirectional so there will be at least two SA per IPSec connection The other part is the actual IP data being transferred using the encryption and authentication methods agreed upon in the IKE negotiation This can be accomplished in a number of ways by using the IPSec protocol ESP To set up an IPSec Virtual Private Network VPN you do not need to configure an Access Policy to enable encryption Just fill in the following settings VPN Name Source Subnet Local Net Destination Gateway If LAN to LAN Destination Subnet If LAN to LAN and Authentication Method Pre shared key or Certificate The firewalls on both ends must use the same Pre shared key or set of Certificates and IPSec lifetime to make a VPN connection Introduction to PPTP PPTP Point to Point Tunneling Protocol jointly developed by Microsoft US Robotics and various other remote access companies known collectively as the PPTP Forum is used to provide IP security at the network layer A PPTP based VPN is made up by these parts e Point to Point Protocol PPP e Authentication Protocols PAP CHAP MS CHAP v1 MS CHAP v2 e Microsoft Point To Point Encryption MPPE e Generic Routing Encapsulation GRE PPTP uses
88. if the remote peer s certificate is signed by a CA whose certificate is present in the Certificates field in the VPN section However in some cases it might be necessary to limit those who can establish a VPN tunnel even among peers signed by the same CA The Identity list can be selected in the Identity List field on the VPN page If an Identity List is configured the firewall will match the identity of the connecting remote peer against the Identity List and only allow it to open the VPN tunnel if it matches the contents of the list If no Identity List is used no identity matching is performed Content Filtering DFL 700 HTTP content filtering may be configured to scan all HTTP protocol streams for URLs or for potentially dangerous Web page content If a match is found between the requested URL and the URL Blacklist the DFL 700 will block the Web page You can configure the URL Blacklist to block all or just some of the pages on a website Using this feature one may deny access to parts of a website without denying access to it completely HTTP content filtering may also be configured to strip potentially dangerous content such as ActiveX objects Flash objects Java and cookies There is also a URL Whitelist to explicitly define URLs that should be excluded from all Content Filtering URLs in this list will not be stripped of ActiveX Java Flash or cookies Note For HTTP URL filtering to work all HTTP traffic needs to go thr
89. igate to the Firewall tab Content Filtering section of the web administration Click on Edit URL Black List to modify or append the contents of the filtering database To allow an entire domain and all sub domains use the following syntax dlink com Allows access to the domain dlink com dlink com Allows access to all sub domains in dlink com Once finished editing the Whitelist click Apply to save changes or Cancel to clear 130 The Blacklist Blacklist configuration is not limited to domain names File extensions may be specified to block the download of said file types Be sure to evaluate the type of files that may be traversing the firewall out of necessity on a regular basis to ensure no loss in productivity due to invalid network configurations or network outages Domains and or file types defined in the Blacklist will be denied upon request Edit Destination URL Global Blacklist The URL blacklist can be used to deny access to complete sites to file types by extension or to URLs with certain words in them Use e g example org to disallow access to an entire site Blank lines and lines beginning with are ignored A Example for blocking all access to a whole site example com example com Or a shorter variant that runs the risk of blocking sites whose names end with the same text example com Deny access to potentially dangerous file types Malicious
90. in 192 168 1 2 IDS signatures Last changed at 2004 06 04 12 12 06 IDS auto update Autoupdate disabled Resources CPU Load 9 RAM 18 63M8 M Connections VPN 17200 l ____ Raes n700 C CPU load over the past 24 hours 100 50 0 2 his ago now State table usage over the past 24 hours 0 his ago Useful for plotting usage trends for your Interfaces Click on Status in the menu bar and then click Interfaces below it A window will appear providing information about the interfaces on the DFL 700 By default information about the LAN interface will be displayed Click on WAN or DMZ for more information about the respective interface Interface Name of the interface being viewed D Link DFL 700 LAN WAN or DMZ Building Networks for People Network Security Firewall Link status Displays what link the current System Firewall Servers __Tools interface has The speed can be 10 or 100 Mbps and the duplex can be eres Half or Full MAC Address MAC address of the interface Interface Status Interface LAN WAN DMZ Interface LAN Link status 100 Mbps full duplex MAC Address 0020 e067 1065 Send rate 1975 kbps Receive rate 504 kbps HEY VPN Send rate over the past 24 hours 1000 kbps Send rate Current Connections amount of traffic sent through the interface 500 kbps
91. ined IP protocols can be found in the appendix named IP Protocol Numbers IP protocol ranges can be used to specify multiple IP protocols for one service An IP protocol range is similar to the TCP and UDP port range described previously The range 1 4 7 will match the protocols ICMP IGMP GGP IP in IP and CBT Follow these steps to add a TCP UDP or TCP UDP service Step 1 Go to Firewall and Service and choose new Step 2 Enter a Name for the service in the name field This name will appear in the service list when you add a new policy The name can contain numbers 0 9 and upper and lower case letters A Z a z and the special characters and _ No other special characters and spaces are allowed Step 3 Select IP Protocol Step 4 Specify a comma separated list of IP protocols Click the Apply button below to apply the changes or click Cancel to discard changes Grouping Services Services can be grouped in order to simplify configuration Consider a Web server using standard http as well as SSL encrypted http https Instead of having to create two separate rules allowing both types of services through the firewall a service group named for instance Web can be created with the http and the https services as group members Follow these steps to add a group Step 1 Go to Firewall and Service and choose new Step 2 Enter a Name for the service in the name field This name will appear in the service list when y
92. ing by checking the Alerting box Click Apply 116 The new mapping is now in the list Configured mappings Name Source Destination Service Pass to map_wwiw Any WAN IP http in all 192 168 2 5 Add new 3 Setup email server and enable alerting System gt Logging N Enable E mail alerting for IDS IDP events Sensitivity Normal EAI SMTP Server 192 168 2 4 Sender idsalert examplecompany com E Mail Address 1 webmaster examplecompany co E Mail Address 2 steve examplecompany com E Mail Address 3 Check Enable E mail alerting for IDS IDP events Select sensitivity Normal Enter SMTP server IP email server 192 168 2 4 Enter sender idsalert examplecompany com Enter E mail address 1 webmaster examplecompany com Enter E mail address 2 steve examplecompany com Click Apply 4 Click Activate and wait for the firewall to restart When attacks are stopped by the firewall it will listed in the logs Since we enabled email alerting in this example emails will also be sent to the users webmaster and steve In this example we used the prevention mode This means that the firewall will block all attacks In Inspection only mode nothing will be blocked the firewall will only log the attacks and send email alerts if that is enabled Appendixes Appendix A ICMP Types and Codes The Internet Control Message Protocol ICMP has many messages that are identified by a type field many
93. istributor and Products purchased and delivered within the fifty states of the United States the District of Columbia U S Possessions or Protectorates U S Military Installations addresses with an APO or FPO Limited Warranty D Link warrants that the hardware portion of the D Link products described below will be free from material defects in workmanship and materials from the date of original retail purchase of the product for the period set forth below applicable to the product type Warranty Period except as otherwise stated herein 1 Year Limited Warranty for the Product s is defined as follows Hardware excluding power supplies and fans One 1 Year Power Supplies and Fans One 1 Year Spare parts and spare kits Ninety 90 days D Link s sole obligation shall be to repair or replace the defective Hardware during the Warranty Period at no charge to the original owner or to refund at D Link s sole discretion Such repair or replacement will be rendered by D Link at an Authorized D Link Service Office The replacement Hardware need not be new or have an identical make model or part D Link may in its sole discretion replace the defective Hardware or any part thereof with any reconditioned product that D Link reasonably determines is substantially equivalent or superior in all material respects to the defective Hardware Repaired or replacement Hardware will be warranted for the remainder of the original Warranty Period fr
94. it will restart 68 Restoring system settings to factory defaults Use the following procedure to restore system settings to the factory defaults This procedure will possibly change the DFL 700 firmware version to a lower version if it has been upgraded Make sure you have the current firmware file available for upload to the device in the case where the firmware version is defaulted to an older version The factory reset procedure erases all configuration changes that have been made to the DFL 700 and reverts the system to its original configuration including resetting of all interface addresses Follow these steps to reset the DFL 700 to factory default settings through the Web based Configuration Step 1 Under the Tools menu and the Reset section click on the Reset to Factory Defaults button Step 2 Click OK in the dialog to reset the unit to factory defaults or press Cancel to cancel Follow these steps to reset the DFL 700 to factory default settings using the Reset button located at the rear of the device Step 1 Using a paperclip or some other rigid small diameter object push in and hold the Reset button with the unit powered off Step 2 Continue to hold the reset button for 15 seconds while the DFL 700 is powered on The Firewall should beep to indicate the default configuration restore procedure has initiated Step 3 Hold the reset button until the Firewall again beeps twice Release the reset button following the
95. ith which you want to synchronize Click the Apply button below to apply the settings or click Cancel to discard changes Setting time and date manually Follow these steps to manually set the system time Step 1 Check the Set the system time box Step 2 Select the correct date Step 3 Set the correct time using the 24 hour format Click the Apply button below to apply the settings or click Cancel to discard changes Firewall Policy The Firewall Policy configuration section is the heart of the firewall The policies are the primary filter that is configured to allow or disallow certain types of network traffic through the firewall The policies also regulate how bandwidth management traffic shaping is applied to traffic flowing through the WAN interface of the firewall When a new connection is being established through the firewall the policies are evaluated top to bottom until a policy that matches the new connection is found The Action of the rule is then carried out If the action is Allow the connection will be established and a state representing the connection is added to the firewall s internal state table If the action is Drop the new connection will be refused The section below will explain the meanings of the various action types available Policy modes The first step in configuring security policies is to configure the mode for the firewall The firewall can run in NAT or No NAT Route mode Select NAT mode
96. k Redirect Datagram for the Type of Service and Host No Code Normal router advertisement Does not route common traffic No Code Time to Live exceeded in Transit Fragment Reassembly Time Exceeded Pointer indicates the error Missing a Required Option Bad Length No Code No Code No Code No Code No Code No Code Bad SPI Authentication Failed Decompression Failed Decryption Failed Need Authentication Need Authorization Source http www iana org assignments icmp parameters RFC792 RFC792 RFC792 RFC792 RFC1256 RFC2002 RFC1256 RFC792 RFC792 RFC792 RFC1108 RFC792 RFC792 RFC792 RFC792 RFC792 RFC950 RFC950 RFC1393 RFC1475 RFC2521 RFC2521 RFC2521 RFC2521 RFC2521 RFC2521 RFC2521 Appendix B Common IP Protocol Numbers These are some of the more common IP Protocols For a list of all protocols follow the link after the table Decimal Keyword Description Reference 1 ICMP Internet Control Message RFC792 2 IGMP Internet Group Management RFC1112 3 GGP Gateway to Gateway RFC823 4 IP IP in IP encapsulation RFC2003 5 ST Stream RFC1190 RFC1819 6 TCP Transmission Control RFC793 8 EGP Exterior Gateway Protocol RFC888 17 UDP User Datagram RFC768 47 GRE General Routing Encapsulation 50 ESP Encapsulation Security RFC2406 Payload 51 AH Authentication Header RFC2402 108 IPComp IP Payload Compression RFC2393 Protocol 112 VRRP Virtual Router Redundancy Protocol 115 L2TP Layer Tw
97. l Secondary DNS Optional Use unit s own DNS relayer addresses Primary WINS Optional 5 d PRINS Optional Name the server pptpServer Leave Outer IP and Inner IP blank Set client IP pool to 192 168 1 100 192 168 1 199 Check Proxy ARP dynamically added routes Check Use unit s own DNS relayer addresses Leave WINS settings blank Authentication Protocot No auth C PAP C CHAP C MSCHAP MPPE encryption possible V MSCHAPy2 MMPE encryption possible MPPE encryption C None C 40 bit C 56 bit 7 128 bit Encryption is only possible when using MSCHAP or MSCHAPYy2 as authentication protocol C Use IPsec encryption Under authentication MSCHAPv2 should be the only checked option Under MPPE encryption 128 bit should be the only checked option Leave Use IPsec encryption unchecked Click Apply 3 Setup policies for the new tunnel Firewall gt Policy Click Global policy parameters Firewall Policy Edit global policy parameters Fragments 7 Drop all fragmented packets Minimum TTL 3 VPN Allow all VPN traffic intemal gt VPN VPN gt internal and VPN gt VPN Enable Allow all VPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 88 4 Set up the authentication source Firewall gt Users Authentication source Local database RADIUS server Select Local database Click Apply 5 Add a new user Firewall gt Users Under
98. l whitelist are excluded from all the below checks Contents 10 entries Edit global UAL whitelist Destination URL Blacklist Attempts to access URLs matching the blacklist is blocked Contents 115 entries Edit URL blacklist Active content handling o Strip Actives objects including Flash E Strip Java applets C Strip Javascript BS cript C Block Cookies The Whitelist Items entered in the Whitelist will always be allowed through the firewall assuming HTTP content filtering is enabled This section should only be used to allow essential domains and servers such as Microsoft com and DLink com to ensure the ability to locate and download critical updates or firmware is not hindered Domains or websites entered in the Whitelist will not be subject to any of the content filtering functions Edit Destination URL Global Whitelist To allow access to a whole domain use e g safesite com Note the ending slash which protects against someone setting up e g www safesite com dyndnsprovider net as an alias for an otherwise disallowed site Blank lines are ignored Lines beginning with are also ignored Access to sites that are important for software updates and require cookies scripts d link com d link com dlink com dlink com d link com tw d link com tw dlink com tw dlink com tw microsoft com microsoft com 200 Apply Cancel Help Nav
99. lient and L2TP Server ccccccccccecceeceeeeeeeeeeeeeeeeees 111 Settings for the Windows XP client ec ceeeeceee cette eee teteeeeetteeeeetneeeere 111 Settings for Main office 2 eee eeeeee teeter eee etie eter tines ee tieeeee teaser tneeeeee 113 Intrusion Detection and Prevention sseeseeeeeeeseeeseeesseesseeee 115 PRU SER 118 Appendix A ICMP Types and Codes 0 ccsceeseeeeeeeeteeeseeeseeseeeees 118 Append Append Append Warranty ix B Common IP Protocol Numbers c ccecceeeeeeeeeeeeees ix C Multiple Public IP addresses ccecceeeeeeeeeeeeeeeeeees IX D HTTP Content Filtering cvcccsiicestcctancccdeaetaeessactiecertecendewase Introduction The DFL 700 provides three 10 100Mbps Ethernet network interface ports which are 1 Internal LAN 1 External WAN and 1 DMZ port In addition the DFL 700 also provides a user friendly Web UI that allows users to set system parameters or monitor network activities using a Web browser supporting Java Features and Benefits Firewall Security VPN Server Client Supported Supports IPSec LAN to LAN or Roaming user tunnels with AES encryption in addition to PPTP and IPSec over L2TP Content Filtering Strip ActiveX objects Java Applets JavaScript and VBScript from HTTP traffic Bandwidth Management DFL 700 features an extensive Traffic Shaper for bandwidth management Web Management Configurable thr
100. list to edit it By default the DFL 700 is enabled to perform NAT on both LAN and DMZ interfaces Disable NAT on the DMZ interface Navigate to Firewall gt Policy in the web based configuration Click on DMZ gt WAN to modify the behavior of the DMZ interface Select the No NAT requires public IP addresses on DMZ network radio button After making configuration changes click on the Apply button to save those changes To allow services on the DMZ interface to be accessible from the WAN incoming policies must be defined to allow those services This can be done through the WAN gt DWNZ section in the Firewall Policy configuration section Once all changes are final those changes must be activated Click on the Activate button under the left hand side menu Follow the on screen instructions to finalize your configuration 128 Appendix D HTTP Content Filtering HTTP Content Filtering Global Policy Protection from malicious or improper web content is a must for Business owners and concerned parents alike There are numerous vehicles for hackers to damage or take control of one s PC or even Network Malicious code may be delivered in deviously crafted Activex controls Java Scripts cookies or tainted file downloads Many times executable exe files are laced with spy ware or viral programs that become active and take over after the program is run for the first time To help reduce the likelihood of malicious software
101. ll e Manual and CD e Quick Installation Guide e 5V 3A AC Power adapter e Straight through CAT 5 cable e RS 232 Null Modem Cable Note Using a power supply with a different voltage rating than the one included with the DFL 700 will cause irreparable electrical damage and void the warranty for this product If any of the above items are missing please contact your reseller System Requirements e Computer running Microsoft Windows Macintosh OS or a UNIX based operating system with an installed Ethernet adapter configured to communicate using TCP IP e Internet Explorer or Netscape Navigator version 6 0 or above with JavaScript enabled 10 Managing D Link DFL 700 When a change is made to the configuration D Li nk a new icon named Building Networks for People DFL 700 Activate Changes will Network Security Firewall appear When all changes made by the Firewall Servers Tools Status Hel administrator are Activate Configuration Changes com p lete th ose ch a n ges Press Activate Changes below to save your changes and have them take effect need to be saved and wie Ian acinar does ot gin win a et ie the rk au th ou ac tivat e d t o t a k e eff e ct by accidentally locked yourself out and revert to its previous configuration clickin g on the Activate Interfaces Wait for admin login for T minute before reverting Changes button on the Activate Configuration Changes page The firewall
102. logging activity The D Link DFL 700 logs activity by sending the log data to one or two log receivers in the network D Link Building Networks for People DFL 700 Network Security Firewall 3 Firewall Servers Tools Status Help Logging Settings re oo Interfaces I Syslog send log data via the syslog protocol to one or two servers If both servers are configured logs will be sent to both at the same time Syslog server 1 Syslog server 2 optional Syslog facility J Local0 I Enable audit logging The firewall normally logs denied packets With audit logging enabled it will also log when allowed connections open and close I Enable E mail alerting for IDS IDP events Time ii Sensitivity Normal z SMTP Server Sender DFL 700 lt hostmaster gt E Mail ddress 1 E Mail Address 2 E Mail Address 3 O O O Apply Cancel Help All logging is done to SYSLog recipients The log format used for SYSLog logging is suitable for automated processing and searching 24 The D Link DFL 700 specifies a number of events that can be logged Some of these events such as startup and shutdown are mandatory and will always generate log entries Other events for instance when allowed connections are opened and closed are configurable It is also possible to have E mail alerting for IDS IDP events to up to three email addresses E
103. lt with before it reaches the policies Logging is carried out if audit logging has been enabled in the Logging Settings page Source and Destination Filter Source Nets Specifies the sender span of IP addresses to be compared to the received packet Leave this blank to match everything 28 Source Users Groups Specifies if an authenticated username is needed for this policy to match Simply make a list of usernames separated by commas specify an entire user group or write Any to indicate all authenticated users to enable authentication on this policy If it is left blank there is no need for authentication for the policy Destination Nets Specifies the span of IP addresses to be compared to the destination IP of the received packet Leave this blank to match everything Destination Users Groups Specifies if an authenticated username is needed for this policy to match Either make a list of usernames separated by a comma or write Any for any authenticated user If it is left blank there is no need for authentication for the policy Service Filter Either choose a predefined service from the dropdown menu or make a custom service The following custom services exist All Matches all protocols TCP UDP ICMP This service matches all ports on either the TCP or the UDP protocol including ICMP Custom TCP This service is based on the TCP protocol Custom UDP This service is based on the UDP protocol
104. nable Logging Follow these steps to enable logging Step 1 Enable SYSLog by checking the SYSLog box Step 2 Fill in your first SYSLog server as SYSLog server 1 If you have two SYSLog servers you have to fill in the second one as SYSLog server 2 You must fill in at least one SYSLog server for logging to work Step 3 Specify what facility to use by selecting the appropriate SYSLog facility LocalO is the default facility Click the Apply button below to apply the settings or click Cancel to discard changes Enable Audit Logging To start auditing all traffic through the firewall follow the steps below This is required when running third party log analyzers on the logs or to see how much traffic specific connections account for Follow these steps to enable auditing Enable SYSLog by checking the Enable Audit Logging box Click the Apply button below to apply the settings or click Cancel to discard changes Enable E mail alerting for IDS IDP events Follow these steps to enable E mail alerting Step 1 Enable E mail alerting by checking the Enable E mail alerting for IDS IDP events checkbox Step 2 Choose the sensitivity level Step 3 In the SMTP Server field fill in the SMTP server to which the DFL 700 will send the e mail alerts Step 4 Specify up to three valid email addresses to receive the e mail alerts Click the Apply button below to apply the settings or click Cancel to discard changes Time Click on Sys
105. nel with certificate based authentication can be set up the firewall needs a certificate of its own and that of the remote firewall These certificates can either be self signed certificates or issued by a CA Trusting Certificates When setting up a VPN tunnel the firewall has to be told whom it should trust When using pre shared keys this is simple The firewall trusts anyone who has the same pre shared key When using certificates on the other hand you tell the firewall that it can trust anyone whose certificate is signed by a given CA Before a certificate is accepted the following steps are taken to verify the validity of the certificate e Construct a certification path up to the trusted root CA e Verify the signatures of all certificates in the certification path e Fetch the CRL for each certificate to verify that none of the certificates have been revoked Local identities This is a list of all the local identity certificates that can be used in VPN tunnels A local identity certificate is used by the firewall to prove its identity to the remote VPN peer To add a new local identity certificate click Add new The following pages will allow you to specify a name for the local identity and upload the certificate and private key files This certificate can be selected in the Local Identity field on the VPN page This list also includes a special certificate called Admin This is the certificate used by the Web interface to
106. nnection and have configured the traffic limits on the WAN interface this limit is sometimes lowered to allow traffic with higher priorities to have precedence By using Guarantee you can traffic using a policy a minimum bandwidth this will only work if the traffic limits for the WAN interface are configured correctly 30 Add a new policy Follow these steps to add a new outgoing policy Step 1 Choose the LAN gt WAN policy list from the available policy lists Step 2 Click on the Add new link Step 3 Fill in the following values Name Specifies a symbolic name for the rule This name is used mainly as a rule reference in log data and for easy reference in the policy list Position Moves before given position Action Select Allow to allow the specified service traffic to traverse the firewall Choose Deny to drop all traffic matching the criteria of the specified service Source Nets Specifies the sender span of IP addresses to be compared to the received packet Leave this blank to match everything Source Users Groups Specifies if an authenticated username is needed for this policy to match Either make a list of usernames separated by a comma or write Any for any authenticated user If it is left blank there is no need for authentication for the policy Destination Nets Specifies the span of IP addresses to be compared to the destination IP of the received packet Leave this blank to match everything Destinati
107. nnection was opened with the exception that statistics regarding sent and received traffic is also included Close Example Oct 20 2003 09 48 05 gateway EFW CONN prio 1 rule Rule_8 conn close connipproto TCP connrecvif lan connsrcip 192 168 0 10 connsrcport 3179 conndestif wan conndestip 64 7 210 132 conndestport 80 origsent 62 termsent 60 In this line the connection in the other example is closed 78 Step by Step Guides The following guides make use of example IP Addresses users sites and passwords You will have to exchange the example information with your own values Passwords used in these examples are not recommended for real life use Strong passwords and keys should be chosen making use of symbols letters and numbers to decrease the likelihood of a brute force dictionary attack success In these guides for example Firewall gt Users will mean that the Firewall tab should first be selected from the menu at the top of the screen stem Serv followed by the Users button to the left of the screen should be selected LAN to LAN VPN using IPSec Main office Pee Le Ip 794 w om gt a 2x SAEN Internet SQ a g lt J v y P EV ey Settings for Branch office 1 Setup interfaces System gt Interfaces WAN IP 194 0 2 10 LAN IP 192 168 4 1 Subnet mask 255 255 255 0 2 Setup IPSec tunnel Firewall gt VPN Under IPSec tunnels click Add new Name the tunnel ToMainOffice Local net 192 168 4 0 24
108. ns through the firewall when the usage log was sent The value after tp is the throughput through the firewall at the time the usage log was logged DROP events These events may be generated by a number of different functions in the firewall The most common source is the policies Example Oct 20 2003 09 42 25 gateway EFW DROP prio 1 rule Rule_1 action drop recvif wan srcip 192 168 10 2 destip 192 168 0 1 ipproto TCP ipdatalen 28 srcport 3572 destport 135 tcphdrlen 28 syn 1 In this line traffic from 192 168 10 2 coming from the WAN side of the firewall connecting to 192 168 10 1 on port 135 is dropped The protocol used is TCP CONN events These events are generated if auditing has been enabled One event will be generated when a connection is established This event will include information about the protocol receiving interface source IP address source port destination interface destination IP address and destination port Open Example Oct 20 2003 09 47 56 gateway EFW CONN prio 1 rule Rule_8 conn open connipproto TCP connrecvif lan connsrcip 192 168 0 10 connsrcport 3179 conndestif wan conndestip 64 7 210 132 conndestport 80 In this line traffic from 192 168 0 10 on the LAN interface is connecting to 64 7 210 132 on port 80 on the WAN side of the firewall internet Another event is generated when the connection is closed The information included in the event is the same as in the event sent when the co
109. o Tunneling Protocol Source http www iana org assignments protocol numbers 120 Appendix C Multiple Public IP addresses Mapping of a Public IP address other than that of the Firewall to a Server located on either internal interface can be accomplished in two basic steps order does not matter add a Port Mapping Virtual Server rule that forwards specified services to a single LAN or DMZ host to be accessible through a WAN IP not used by the DFL 700 add a static route in the firewall s routing table indicating the internal interface to which the Public IP should be mapped For an increased level of protection from Network Intrusions or malicious attacks isolation of servers accessible to the public from the Private network is recommended This will ensure that if one of those servers happens to become compromised through vulnerabilities related to software an attacker would not be able to directly access the private internal Network The DFL 700 provides a physical DMZ network interface specifically for this purpose This can be accomplished with NAT disabled or enabled on the DMZ interface Example Scenario using NAT The firewall is configured using the following scheme in order to allow Internet hosts access to web services running on either the internal LAN or DMZ Network DMZ 192 168 10 1 LAN 192 168 2 1 WAN 80 80 80 80 24 The goal is to map two internal web servers port 80 to two Public IP addresses p
110. o discard changes 54 Adding an L2TP PPTP VPN Client Follow these steps to add an L2TP or PPTP VPN Client configuration Step 1 Go to Firewall and VPN and choose Add new PPTP client or Add new L2TP client in the L2TP PPTP Clients section Step 2 Enter a Name for the new tunnel in the name field The name can contain numbers 0 9 and upper and lower case letters A Z a z and the special characters and _ No other special characters or spaces are allowed Step 3 Enter the username and password for the PPTP or L2TP Client Step 4 Specify if the IP should be received from the server or if a static one should be used This field should be left blank in most scenarios Step 5 Specify the Remote Gateway this should be the IP of the L2TP or PPTP Server you are connecting to Step 6 If you are using IPSec encryption for the L2TP or PPTP Client choose the appropriate authentication type either PSK Pre shared Key or Certificate based Click the Apply button below to apply the change or click Cancel to discard changes Adding an L2TP PPTP VPN Server Follow these steps to add an L2TP or PPTP VPN Server configuration that listens on the WAN IP Step 1 Go to Firewall and VPN and choose Add new PPTP server or Add new L2TP server in the L2TP PPTP Server section Step 2 Enter a Name for this tunnel in the name field The name can contain numbers 0 9 and upper and lower case letters A Z a z and the special ch
111. om the date of original retail purchase If a material defect is incapable of correction or if D Link determines in its sole discretion that it is not practical to repair or replace the defective Hardware the price paid by the original purchaser for the defective Hardware will be refunded by D Link upon return to D Link of the defective Hardware All Hardware or part thereof that is replaced by D Link or for which the purchase price is refunded shall become the property of D Link upon replacement or refund Limited Software Warranty D Link warrants that the software portion of the product Software will substantially conform to D Link s then current functional specifications for the Software as set forth in the applicable documentation from the date of original retail purchase of the Software for a period of ninety 90 days Warranty Period provided that the Software is properly installed on approved hardware and operated as contemplated in its documentation D Link further warrants that during the Warranty Period the magnetic media on which D Link delivers the Software will be free of physical defects D Link s sole obligation shall be to replace the non conforming Software or defective media with software that substantially conforms to D Link s functional specifications for the Software or to refund at D Link s sole discretion Except as otherwise agreed by D Link in writing the replacement Software is provided only to
112. on Users Groups Specifies if an authenticated username is needed for this policy to match Either make a list of usernames separated by a comma or write Any for any authenticated user If it is left blank there is no need for authentication for the policy Service Either choose a predefined service from the dropdown menu or make a custom service Schedule Choose which schedule should be used for this policy to match Choose Always for no scheduling Step 4 If using Traffic shaping fill in the required information If not skip this step Click the Apply button below to apply the changes or click Cancel to discard changes Note Refer to Appendix C of the manual for details on mapping Public IP addresses to Internal Servers Change order of policy Follow these steps to change the order of a policy Step 1 Choose the policy list for which you would like to change the order from the available policy lists Step 2 Click on the Edit link corresponding to the rule you want to move Step 3 Change the number in the Position to the new line This will occur after the apply button is clicked and will move the policy to the new row and move the old policy and all following policies one step down Click the Apply button below to apply the changes or click Cancel to discard changes Delete policy Follow these steps to delete a policy Step 1 Choose the policy list from which you would like do delete the policy in from the avail
113. onnection UDP The connection is a UDP connection RAWIP The connection uses an IP protocol other than TCP UDP or ICMP The Source and Destination columns show which IP and port on the source interface the connection is coming from and which interface and port number the connection is going to 74 DHCP Server Click on Status in the menu bar and then click DHCP Server below it A window will appear providing information about the configured DHCP Servers By default information about the LAN interface will be displayed To see another one click on that interface Interface Name of the interface the DHCP Server is running on IP Span Displays the configured range of IP addresses that are given out as DHCP leases Usage Displays how much of the IP range is give out to DHCP clients Active leases are the current computers using this DHCP server It is also possible to end a computers lease on this screen by clicking VPN Connections on End lease corresponding to that IP D Link Building Networks for People DFL 700 Network Security Firewall System Firewall Servers __ Tools DHCP Server Status Interface LAN YPNTunnell Interface LAN IP Span 192 168 1 100 192 168 1 200 Usage 15 CEM Active leases IP Address 192 168 1 100 192 168 1101 192 168 1 103 192 168 1 104 MAC Address 0020 e012 3456 0020 e012 456
114. ore secure solution read the Settings for the Main office part of the A more secure LAN to LAN VPN solution section 114 Intrusion Detection and Prevention XK N Intrusion detection and prevention can be enabled for both policies and port mappings In this example we are using a port mapping The policy setup is quite similar In this example a mail server with IP 192 168 2 4 and a web server with IP 192 168 2 5 are connected to the DMZ interface on the firewall To set up intrusion detection and prevention to a web server on the DMZ net follow these steps 1 Create a Port mapping for the web server Firewall gt Port Mapping Under Configured mappings click Add new 2 Set up the newly created port mapping Port Mapping Yirtual Servers Edit new mapping Name map_waw Source Nets Blank everyone Users Groups Any Any authenticated Destination IP Blank WAN interface IP address Service http in all y Custom source ports Blank any port destination ports Pass to port and up Blank no change Pass To 192 168 2 5 Schedule Always v N Intrusion Detection Prevention Mode Prevention Ly Alerting V Enable IDS IDP alerting via email for this rule Name the rule map_www Select service http in all Enter pass to IP 192 168 2 5 the IP of the web server Check the Intrusion detection prevention option Select mode Prevention Enable email alert
115. ou add a new policy The name can contain numbers 0 9 and upper and lower case letters A Z a z and the special characters and _ No other special characters and spaces are allowed Step 3 Select Group Step 4 Specify a comma separated list of existing services Click the Apply button below to apply the changes or click Cancel to discard changes 46 Protocol independent settings Allow ICMP errors from the destination to the source ICMP error messages are sent in several situations for example when an IP packet cannot reach its destination The purpose of these error control messages is to provide feedback about problems in the communication environment However ICMP error messages and firewalls are usually not a very good combination the ICMP error messages are initiated at the destination host or a device within the path to the destination and sent to the originating host The result is that the ICMP error message will be interpreted by the firewall as a new connection and dropped if not explicitly allowed by the firewall rule set It is generally not a good idea to allow any inbound ICMP message to be able to have those error messages forwarded To solve this problem the DFL 700 can be instructed to pass an ICMP error message only if it is related to an existing connection Check this option to enable this feature for connections using this service ALG Similar to the way most stateful inspection firewalls beh
116. ough a policy using a service with the HTTP ALG Content Filtering rules will not apply to HTTPS streams A pre defined HTTP outbound TCP All gt 80 ALG http cf max 100 service is provided to simplify the configuration of HTTP Content Filtering Refer to Appendix D for more detailed information on configuration of HTTP Content Filtering Edit the URL Global Whitelist Follow these steps to add or remove a URL D Link Building Networks for People DFL 700 Network Security Firewall Servers Tools __ Status Help HTTP Content Filtering Step 1 Navigate to Firewall Content Filtering and choose Edit global URL Whitelist Step 2 Add or edit a URL that should always be allowed Remove any URL that you do not want to always allow Click the Apply button Edit Destination URL Global Whitelist Polic a To allow access to a whole domain use e g safesite com Note the ending slash which protects against someone setting up e g www safesite com dyndnsprovider net as an alias for an otherwise disallowed site Portmapping Blank lines are ignored Lines beginning with i are also ignored E Access to sites that are important for software updates and z Ven require cookies scripts clink com lnk com clink com tw lnk com tw microsoft com Schedules Services IBLE VPN below to apply the changes or click Cancel to discard changes
117. ough any networked computer s Web browser using Netscape or Internet Explorer Access Control supported Allows assignment of different access rights for different users such as Admin or Read Only User Introduction to Firewalls A firewall is a device that sits between your computer and the Internet that prevents unauthorized access to or from your network A firewall can be a computer using firewall software or a special piece of hardware built specifically to act as a firewall In most circumstances a firewall is used to prevent unauthorized Internet users from accessing private networks or corporate LAN s and Intranets Firewalls are also deployed to prevent sensitive information about your network from leaking out of your network A firewall monitors all of the information moving to and from your network and analyzes each piece of data Each piece of data is then checked against a set of criteria configured by the administrator If any data does not meet the criteria that data is blocked and discarded If the data meets the criteria the data is passed through This method is called packet filtering A firewall can also run specific security functions based on the type of application or type of port that is being used For example a firewall can be configured to work with an FTP or Telnet server Or a firewall can be configured to work with specific UDP or TCP ports to allow certain applications or games to work properly over the Inte
118. ply the settings or click Cancel to discard changes Please keep in mind that the DHCP scope will also need to be changed to correspond with the new LAN IP If the computer through which the DFL 700 is being configured is a DHCP client you will need to manually release and renew the IP address after applying changes and restarting Failure to follow these directions will result in the firewall configuration reverting back to the state prior to changing the LAN IP WAN Interface Settings Using Static IP If you are using Static IP you have to fill in the IP address information provided to you by your ISP All fields are required except the Secondary DNS Server Note Do not use the numbers displayed in these fields they are only used as an example IP Address The IP address of the WAN interface This is the address that may be used Interface Settings Edit settings of the WAN interface Change WAN Type Static IP Static WAN interface configuration is most commonly used in dedicated ine intenet connections Your ISP usually provides this information to you IP Address 192168102 Subnet Mask 255 255 255 0 _ 256 hosts 24 Gateway IP 192168101 Primary DNS Server 10 001 Secondary DNS Server 0 0 0 2 optional to ping the firewall remotely control it and be used as the source address for dynamically translated connections Subnet Mask Size of the external network Gateway IP Specifies the IP addr
119. product is within warranty the customer shall submit a claim to D Link as outlined below The customer must submit with the product as part of the claim a written description of the Hardware defect or Software nonconformance in sufficient detail to allow D Link to confirm the same The original product owner must obtain a Return Material Authorization RMA number from the Authorized D Link Service Office and if requested provide written proof of purchase of the product such as a copy of the dated purchase invoice for the product before the warranty service is provided After an RMA number is issued the defective product must be packaged securely in the original or other suitable shipping package to ensure that it will not be damaged in transit and the RMA number must be prominently marked on the outside of the package Do not include any manuals or accessories in the shipping package D Link will only replace the defective portion of the Product and will not ship back any accessories The customer is responsible for all in bound shipping charges to D Link No Cash on Delivery COD is allowed Products sent COD will either be rejected by D Link or become the property of D Link Products shall be fully insured by the customer and shipped to D Link Systems Inc 17595 Mt Herrmann Fountain Valley CA 92708 D Link will not be held responsible for any packages that are lost in transit to D Link The repaired or replaced packages will b
120. provide HTTPS access Note The certificate named Admin can only be replaced by another certificate It cannot be deleted or renamed This is used for HTTPS access to the DFL 700 Certificates of remote peers This is a list of all certificates of individual remote peers To add a new remote peer certificate click Add new The following pages will allow you to specify a name for the remote peer certificate and upload the certificate file This certificate can be selected in the Certificates field on the VPN page Certificate Authorities This is a list of all CA certificates To add a new Certificate Authority certificate click Add new The following pages will allow you to specify a name for the CA certificate and upload the certificate file This certificate can be selected in the Certificates field on the VPN page 58 Note If the uploaded certificate is a CA certificate it will automatically be placed in the Certificate Authorities list even if Add New was clicked in the Remote Peers list Similarly a non CA certificate will be placed in the Remote Peers list even if Add New was clicked from the Certificate Authorities list Identities This is a list of all the configured Identity lists An Identity list can be used on the VPN page to limit inbound VPN access from this list of known identities Normally a VPN tunnel is established if the certificate of the remote peer is present in the Certificates field in the VPN section or
121. red the server on the firewall you should be able to click Connect to establish the connection to the Main office Settings for Main office 1 Setup interfaces System gt Interfaces WAN IP 194 0 2 20 LAN IP 192 168 1 1 Subnet mask 255 255 255 0 108 2 Setup PPTP server Firewall gt VPN Under L2TP PPTP Server click Add new PPTP server Name the server pptpServer Leave Outer IP and Inner IP blank Set client IP pool to 192 168 1 100 192 168 1 199 Check Proxy ARP dynamically added routes Check Use unit s own DNS relayer addresses Leave WINS settings blank Under authentication MSCHAPv2 should be the only checked option Under MPPE encryption 128 bit should be the only checked option Leave Use IPSec encryption unchecked Click Apply 3 Setup policies for the new tunnel Firewall gt Policy Click Global policy parameters Enable Allow all VPN traffic internal gt VPN VPN gt internal and VPN gt VPN Click Apply 4 Set up authentication source Firewall gt Users Select Local database Click Apply 5 Add a new user Firewall gt Users Under Users in local database click Add new Name the new user HomeUser Enter password 1234567890 Retype password 1234567890 Leave static client IP empty could also be set to eg 192 168 1 200 If no IP is set here the IP pool from the PPTP server settings are used Click Apply 6 Click Activate and wait for the firewall to restart This example will allow all traffic from
122. rk or 172 16 0 1 172 16 0 10 for a range of IP addresses Step 4 Specify protocol to be used to access the DFL 700 via the dropdown menu Select HTTP and HTTPS Secure HTTP or HTTPS only Click the Apply button below to apply the settings or click Cancel to discard changes Example M Admin Full access to web based management Networks fi 0 0 0 223 255 255 255 Protocol HTTPS only X Add Read only access to an interface To add read only access click on the interface you would like to add it to Note that if you only have read only access enabled on an interface all users will only have read only access even if they are administrators Follow these steps to add read only access to an interface Step 1 Click on the interface you would like to add it to Step 2 Enable the Read only checkbox Step 3 Specify which network addresses should be allowed read only access to the interface for example 192 168 1 0 24 for a whole class C network or 172 16 0 1 172 16 0 10 for a range of IP addresses Step 4 Specify protocol to be used to access the DFL 700 via the dropdown menu Select HTTP and HTTPS Secure HTTP or HTTPS only Click the Apply button below to apply the settings or click Cancel to discard changes Example M Read only Read only access to web based management Networks fi 72 16 01 172 16 0 10 Protocol HTTP and HTTPS Enable SNMP access to an interface Follow these steps to add read onl
123. rnet Introduction to Local Area Networking Local Area Networking LAN is the term used when connecting several computers together over a small area such as a building or group of buildings LANs can be connected over large areas A collection of LANs connected over a large area is called a Wide Area Network WAN A LAN consists of multiple computers connected to each other There are many types of media that can connect computers together The most common media is CAT5 cable UTP or STP twisted pair wire On the other hand wireless networks do not use wires instead they communicate over radio waves Each computer must have a Network Interface Card NIC which communicates the data between computers A NIC is usually a 10Mbps network card or 10 100Mbps network card or a wireless network card Most networks use hardware devices such as hubs or switches that each cable can be connected to in order to continue the connection between computers A hub simply takes any data arriving through each port and forwards the data to all other ports A switch is more sophisticated in that a switch can determine the destination port for a specific piece of data A switch minimizes network traffic overhead and speeds up the communication over a network Networks take some time in order to plan and implement correctly There are many ways to configure your network You may want to take some time to determine the best network set up for your needs LEDs
124. rovided by our ISP Host Interface Private IP Public IP Firewall LAN 192 168 2 1 80 80 80 80 Firewall DMZ 192 168 10 1 80 80 80 80 Web Server on LAN 192 168 2 50 80 80 80 81 Web Server on DMZ 192 168 10 100 80 80 80 82 IP 192 168 2 50 To accomplish this we need to create the following firewall settings Configure two static routes one for each public IP we wish to forward Create two port mappings one for each public IP mapping to each private Server Routing configuration Routing Table Edit new route Interface LAN v Network 80 80 80 81 Subnet Mask 255 255 255 255 1 host 32 Gateway 7 Network is behind remote gateway Proxy ARP Publish network on all other interfaces via Proxy ARP Additional IP C Additional firewall IP address that hosts can use as gateway Static Route Configuration for a Server on the LAN Navigate to the SYSTEM tab then the ROUTING page of the Web based configuration Select the Add New link to create the first static route Select the Interface that the Internal Server is connected to LAN or DMZ Specify the Public IP to be forwarded in the Network field The Subnet Mask should be set to 255 255 255 255 1 host Enable the Proxy ARP feature The above static route configuration explicitly defines the interface that the additional Public IP address should be forwarded to 122 Routing Table Edit new route Interfa
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126. side the United States please contact corresponding local D Link office CE Mark Warning This is a Class A product In an Industrial environment this product may cause radio interference in which case the user may be required to take adequate measures 138
127. t Blank for the WAN IP Inner IP Specifies the internal IP of the VPN tunnel Leave this field Blank for the LAN IP IP Pool and settings Information related to client IP assignment L2TP PPTP Servers Add L2TP tunnel Name Outer IP Blank WAN IP Must be WAN IP if IPsec equ Inner IP Blank LAN IP IP Pool and settings Client IP Pool x x x pyypy Primary DNS __ SSF Optional Secondary DNS E Optional M Use unit s own DNS relayer addresses Primary WINS L oo Optional Secondary WINS L Optional Client IP Pool An IP range group or entire network that the PPTP L2TP Server will use as an IP address pool to assign dynamic IP addresses to clients Primary Secondary DNS IP addresses of the primary and secondary DNS servers If utilizing the DNS Relay function be sure to enable the check box to ensure proper DNS info Primary Secondary WINS IP of the Windows Internet Name Service WINS servers that are used in Microsoft environments which uses the NetBIOS Name Servers NBNS to assign IP addresses to NetBIOS names Authentication Specify which authentication protocol to use if any not necessary Refer to the Authentication Protocols section for more information about each type MPPE encryption If MPPE encryption is to be used select the desired level of encryption key MPPE is used with PPTP A selection of None means that data will be sent over the PPP link unencrypted
128. tem in the menu bar and then click Time below it This will give you the option to either set the system time by synchronizing with an Internet Network Time Server NTP or by entering the system time manually D Link Building Networks for People DFL 700 Network Security Firewall Firewall Servers _Tools__ Status Help _ Time Settings Current time and date Administration Set the system time Date E a oe z Time fi2 34 56 24 hour time Interfaces Routing Time zone and daylight saving time settings Time zone GMT 01 00 Amsterdam Berlin Bern Rome Stockholm Vienna No daylight saving time O Apply daylight saving time from Mar z E z ai Oct z 28 z Logging ARENY Automatic time synchronization I Enable NTP Primary NTP Server Secondary NTP Server optional O OO Apply Cancel Help 26 Changing time zone Follow these steps to change the time zone Step 1 Choose the correct time zone in the drop down menu Step 2 Specify the dates to begin and end daylight saving time or choose no daylight saving time by checking the correct box Click the Apply button below to apply the settings or click Cancel to discard changes Using NTP to sync time Follow these steps to sync to an Internet Time Server Step 1 Enable synchronization by checking the Enable NTP box Step 2 Enter the Server IP Address or Server name w
129. the original licensee and is subject to the terms and conditions of the license granted by D Link for the Software Software will be warranted for the remainder of the original Warranty Period from the date or original retail purchase If a material non conformance is incapable of correction or if D Link determines in its sole discretion that it is not practical to replace the non conforming Software the price paid by the original licensee for the non conforming Software will be refunded by D Link provided that the non conforming Software and all copies thereof is first returned to D Link The license granted respecting any Software for which a refund is given automatically terminates Non Applicability of Warranty The Limited Warranty provided hereunder for hardware and software of D Link s products will not be applied to and does not cover any refurbished product and any product purchased through the inventory clearance or liquidation sale or other sales in which D Link the sellers or the liquidators expressly disclaim their warranty obligation pertaining to the product and in that case the product is being sold As Is without any warranty whatsoever including without limitation the Limited Warranty as described herein notwithstanding anything stated herein to the contrary Submitting A Claim The customer shall return the product to the original purchase point based on its return policy In case the return policy period has expired and the
130. ting and ending date and hour when the schedule should be active Step 3 Use the checkboxes to set the times this schedule should be active inside the specified timeframe Click the Apply button below to apply the changes or click Cancel to discard changes 44 Services A service is basically a definition of a specific IP protocol with corresponding parameters The service http for instance is defined as using the TCP protocol with destination port 80 Services are simplistic in that they cannot carry out any action in the firewall on their own Thus a service definition does not include any information whether the service should be allowed through the firewall or not That decision is made entirely by the firewall policies in which the service is used as a filter parameter Adding TCP UDP or TCP UDP Service For many services a single destination port is sufficient The http service for instance uses destination port 80 To use a single destination port enter the port number in the destination ports text box In most cases all ports 0 65535 have to be used as source ports The second option is to define a port range a port range is inclusive meaning that a range 137 139 covers ports 137 138 and 139 Multiple ranges or individual ports may also be entered separated by commas For instance a service can be defined as having source ports 1024 65535 and destination ports 80 82 90 92 and 95 In this case a TCP or UDP pack
131. tomatic configuration Everything is automatic Static IP manual configuration Your ISP should provide this information to you IPAddess Subnet Mask 255 255 255 0 _ 256 hosts 724 Gateway IP This may or may not be necessary depending on the ISP ISP used Your ISP should supply this information If using static IP this information needs to be filled in e IP Address The IP address of the WAN interface This IP is used to connect to the PPTP server e Subnet Mask Size of the external network e Gateway IP Specifies the IP address of the default gateway used to access the Internet 18 WAN Interface Settings L2TP over Ethernet connections are used in some DSL and cable modem networks You need to enter your account details and possibly also IP configuration parameters of the actual physical interface that the L2TP tunnel runs over Your ISP should supply this information Username The login or username supplied to you by your ISP e Password The password supplied to you by your ISP e L2TP Server IP The IP of the L2TP server that the DFL 700 will connect to Using L2TP Interface Settings Edit settings of the WAN interface Change WAN Type L2TP Apply Change L2TP over Ethemet connections are used in some DSL and cable modem networks You need account details and possibly also IP configuration parameters of the actual physical interfa
132. vete Senn testutetslaatettave tise devtasusudevse tesa deushtotinentiae 76 How TO PAC th 00 Srnci aaa aaa 77 USAGE CVGMS aiae n a e a eae ateesaactes 77 DROP EVENS e E a A 77 CONN events nerc crnina eaa a a aa a T EEEE E Ean 78 Step by Step Guilde S oranananananananannnin aaa 79 LAN to LAN VPN using IPSec scsssecssticcareccarncastsvnncecsanaevarereonsnuenseeuensce 80 Settings for Main office 2 eee cette ee eete eee e teat ee ee eater ee saeeeeesaeeeeeenaeeeeneaas 82 LAN to LAN VPN using PPTP ccecceeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeneees 84 Settings for Main Off1Ce cic csceee eiticer es daceevs entice evaticeres haces eiiieeeevnnieeevianie 86 LAN to LAN VPN using L2TP c ccceeceeeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 90 Settings for Branch OFFICE 22 ccccesecccceesececesenssceeceeseuceesbencededeueseaeseeeeeaeeeaee 90 Settings for Main OFFICE ec eeeee ee enne eee e eee ee eeeaeeeeeeaeeeeeeaeeeeeenaeeeeeeaas 93 Amore secure LAN to LAN VPN solution 0 seeeeeeeeeeteeeereeeeee 97 Settings for Branch OFFICE 0 eee eee eee eeee eect ente ee eee eater eeeaeeeeeeaeeeeeenaeeeeeeaas 97 Settings for Malm Once s 3 cccevcnseac iarain eE AS 100 Windows XP client and PPTP Servet cccccccccccecececeeeeeeeeeeeeeees 101 Settings for the Windows XP client eceeeeeeeeee etter eee teteeeeeteneeeeetneeeee 101 Settings for Main Off ICC essais iiini nia E aii nadeadents 108 Windows XP c
133. way Additional IP Proxy ARP WAN 194 1 2 0 24 Edit LAN 192 168 1 0 24 Edit WAN 0 0 0 0 0 194 1 2 254 Edit LAN 192 168 5 0 24 192 168 5 1 Edit YPNTunnel1 192 168 2 0 24 Yes Edit Add new The Routes configuration section describes the firewall s routing table The DFL 700 uses a slightly different method of describing routes compared to most other systems However we believe that this method of describing routes is easier to understand making it less likely for users to cause errors or breaches in security Interface Specifies which interface packets destined for this route shall be sent through Network Specifies the network address for this route Gateway Specifies the IP address of the next router hop used to reach the destination network If the network is directly connected to the firewall interface no gateway address is specified Additional IP Address The IP address specified here will be automatically published on the corresponding interface This address will also be used as the sender address in ARP queries If no address is specified the interface IP address of the firewall will be used Proxy ARP Specifies that the firewall shall publish this route via Proxy ARP One advantage with this form of notation is that you can specify a gateway for a particular route without having a route that covers the gateway s IP address or despite the fact that the route that covers the gateway s IP address
134. y SNMP access to an interface Step 1 Click on the interface you would like to add it to Step 2 Enable the Read only checkbox Step 3 Specify which network addresses should be allowed to receive SNMP traps for example 192 168 1 0 24 for a whole class C network or 172 16 0 1 172 16 0 10 for a range of IP addresses Step 4 Specify the community string used to authenticate the DFL 700 Click the Apply button below to apply the settings or click Cancel to discard changes Example M SNMP Simple Network Management Protocol read only access Networks 192 168 1 10 Community MySecretCommunity 14 System Interfaces Click on System in the menu bar and then click interfaces below it Change IP of the LAN or DMZ interface Follow these steps to change the IP of the LAN or DMZ interface Interface Settings Edit settings of the LAN interface IP Address fi 92 168 0 1 Subnet Mask 255 255 255 0 256 hosts 24 Step 1 Choose which interface to view or change under the Available interfaces list Step 2 Fill in the IP address of the LAN or DMZ interface These are the addresses that will be used to ping the firewall remotely control it and used as the gateway for the internal hosts or DMZ hosts Step 3 Choose the correct Subnet mask of this interface from the drop down menu This configuration will determine the IP addresses that can communicate with this interface Click the Apply button below to ap
135. you most likely will be using IPSec instead of MPPE for data encryption To use IPSec enable the checkbox and select PSK or Certificate L2TP PPTP Clients Add PPTP Client Name Basic settings Usemame Password Retype Password Interface IP Blank get IP from server Remote a Gateway M Use primary DNS server from tunnel as primary DNS O Use secondary DNS server from tunnel as secondary DNS Hint Use Servers gt DNS Relayer to easily make DNS servers available to internal client Dial on demand Idle timeout 60 minutes Count sending as activity Count receiving as activity Count both as activity If enabled the tunnel will only be initiated when needed If disabled the tunnel will be persistent always on Authentication Protocol 7 No auth M pap M CHAP Mv MSCHAP MPPE encryption possible M MSCHAPv2 MMPE encryption possible MPPE encryption None M 40bit M 56 bit bit on is only possible when using MSCHAP or MSCHAPv2 as authentication I Use IPsec encryption PSK Pre Shared Key Key Retype key Certificate based Local Identity Admin CN 000F3D10FC27 Certificates Use ctrl shift To use ID lis Identity List hoin wei list gt L2TP PPTP Servers Settings for L2TP PPTP Server Configuration Name Specifies a name for this PPTP L2TP Server Outer IP Specifies the IP that the PPTP L2TP server should listen on leave i

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