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Linksys WRT54G User's Manual

1. Figure 6 17 MAC Acidress Filter List 23 The Wreless Tab Advanced Vireless Settings A Disien of Osco Systm toe Famer Version v1 20 Baisi This tab is used to set up the Router s advanced wireless functions These settings should only be adjusted by an expert administrator as incorrect settings can reduce wireless performance Wireless less G Broadband Router write Authentication Type The default is set to Auto which allows either Open System or Shared Key authentication to be used With Qoen System authentication the sender and the recipient do NOT use a WEP key for a eee authentication With Shared Key authentication the sender and recipient use a WEP key for authentication Trent Ato Y etme a Basic Rate The Basic Rate setting is not actually one rate of transmission but a series of rates advertising to the ome fam ite ade other wireless points in your network at what rates the Router can transmit At the default setting the Router will ein suppose advertise that it will Automatically select the best rate for transmission Other options of rates to advertise are Memet IAT gem 007 rarge0 2007 1 2Mibps for use with older wireless technology and All when you wish to make all rates advertised The Basic Rate is not the rate transmitted that is the Transmission Rate au Figure 6 18 Wrreless Tab Advanced Wireless Settings Transmission Rate The rate of data transmission should be set dep
2. Daisy Chain A method used to connect devices in a series one after the other Database A collection of data that is organized so that its contents can easily be accessed managed and updated DDNS Dynamic Domain Name System The capability of having a website FTP or e mail server with a dynamic IP address use a fixed domain name Default Gateway A device that forwards Internet traffic from your local area network DHCP Dynamic Host Configuration Protocol A protocol that lets one device on a local network known as a DHCP server assign temporary IP addresses to the other network devices typically computers DMZ Demilitarized Zone Removes the Router s firewall protection from one PC allowing it to be seen from the Internet DNs Domain Name Server The IP address of your ISP s server which translates the names of websites into IP addresses Domain A specific name for a network of computers Download To receive a file transmitted over a network D6L Digital Subscriber Line An always on broadband connection over traditional phone lines psss Direct Sequence Spread Spectrum A type of radio transmission technology that includes a redundant bit pattern to lessen the probability of data lost during transmission Used in 802 11b networking Drm Delivery Traffic Indication Message A message included in data packets that can increase wireless efficiency 65 Dynamic IP Address A temporary IP addre
3. gt Management tab 2 Enter a different password in the Router Password field and enter the same password in the second field to confirm the password 3 Click the Save Settings button 11 1 am a PPPoE user and I need to remove the proxy settings or the dial up pop up window If you have proxy settings you need to disable these on your computer Because the Router is the gateway for the Internet connection the computer does not need any proxy settings to gain access Please follow these directions to verify that you do not have any proxy settings and that the browser you use is set to connect directly to the LAN e For Microsoft Internet Explorer 5 0 or higher 1 Click Start Settings and Control Panel Double click Internet Options 2 Click the Gonnections tab 3 Click the LAN settings button and remove anything that is checked 4 Click the axbutton to go back to the previous screen 5 Click the option Never dial a connection This will remove any dial up pop ups for PPPoE users e For Netscape 4 7 or higher 1 Start Netscape Navigator and click Edit Preferences Advanced and Praxdes 2 Make sure you have Direct connection to the Internet selected on this screen 3 Close all the windows to finish 12 To start over need to set the Router to factory default Hold the Reset button for 10 seconds and then release it This will return the password forwarding and other settings on the Router to the factory default setti
4. 2 A device for making breaking or changing the connections in an electrical circuit 68 TcP IP Transmission Control Protocol Internet Protocol A network protocol for transmitting data that requires acknowledgement from the recipient of data sent Telnet A user command and TCP IP protocol used for accessing remote PCs TFTP Trivial File Transfer Protocol A version of the TCP IP FTP protocol that uses UDP and has no directory or password capability Throughput The amount of data moved successfully from one node to another in a given time period Topology The physical layout of a network TX Rate Transmission Rate upp User Datagram Protocol A network protocol for transmitting data that does not require acknowledgement from the recipient of the data that is sent Upgrade To replace existing software or firmware with a newer version Upload To transmit a file over a network URL Uniform Resource Locator The address of a file located on the Internet VPN Virtual Private Network A security measure to protect data as it leaves one network and goes to another over the Internet WAN Wide Area Network The Internet wep Wired Equivalent Privacy A method of encrypting data transmitted on a wireless network for greater security WNPCFG A Windows 98 and Millennium utility that displays the IP address for a particular networking device WLAN Wireless Local Area Network A group of computers and as
5. DHCP Server DHCP is enabled by factory default If you already have a DHCP server on your network or you seamen don t want a DHCP server then click the Disable radio button no other DHCP features will be available ans 110 1 10 1 10 WNS 110 j 0 Starting IP Address Enter a value for the DHCP server to start with when issuing IP addresses Because the Router s default IP address is 192 168 1 1 the Starting IP Address must be 192 168 1 2 or greater but smaller Figure 6 9 Network Acidress Server Settings than 192 168 1 253 The default Starting IP Address is 192 168 1 100 17 Maimam Number of DHCP Users Enter the maximum number of PCs that you want the DHCP server to assign IP addresses to This number cannot be greater than 253 The default is 50 dient Lease Time The Client Lease Time is the amount of time a network user will be allowed connection to the Router with their current dynamic IP address Enter the amount of time in minutes that the user will be leased this dynamic IP address After the time is up the user will be automatically assigned a new dynamic IP address The default is 0 minutes which means one day Static DNS 1 3 The Domain Name System DNS is how the Internet translates domain or website names into Internet addresses or URLs Your ISP will provide you with at least one DNS Server IP Address If you wish to use another type that IP Address in one of these fields You can type up to
6. Traceroute Parameters Traceroute Test To test the performance of a connect click the Traceroute button Enter the address of the PC Po whose connection you wish to test and click the Ping button A successful test will look similar to that shown in eis BERE n S Figure 5 34 To stop the test click the Stopbutton Click the Gear Logbutton to clear the screen Click the Gose PEOD TNR TET ame button to return to the Diagnostics screen fin oe at Soy tm 64 bytes Gom 192 168 1 1 emp segat M255 imest Few Spots wom 3 phases ON pha oes Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes Traceroute Test IP Address or Domain Namet 19216811 Cis Iaceroute to 192 168 11 192 168 1 1 30 hops max 40 byw packets 1192 168 11 192 168 1 1 LOSI ms 0 948 ms O94 me Figure 6 34 The Traceroute Test Chapter 6 Configuring the Wireless G Broadband Router 33 The Administration Tab Diagnostics Wireless G Broadband Router The Ackministration Tab Factory Defaults LINKSYS A Division ot Osco Systems tne Click the Yes button to reset all configuration settings to their default values and then click the Save Settings button Any settings you have saved will be lost when the default settings are restored This feature is disabled by default Administration Figure 6 35 Adiministration Tab Factory Defaults LINKSYS Administra
7. select Everyday Select 24 Hours or enter a range of hours in which the policy will be in effect Filtered Port Range To filter a range of ports based on certain criteria enter the ranges here TCP Enter the range of the ports you wish to filter that use the TCP protocol upp Enter the range of the ports you wish to filter that use the TCP protocol Both Enter the range of the ports you wish to filter that use both the TCPand UDP protocols Disable Two ranges are supplied for ports you wish to disable Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes Figure 6 27 List of PCs 29 Wireless G Broadband Router The Applications and Gaming Tab Port Range Forward The Applications and Gaming Tab allows you to set up public services on your network such as web servers ftp servers e mail servers or other specialized Internet applications Specialized Internet applications are any applications that use Internet access to perform functions such as videoconferencing or online gaming Some Internet applications may not require any forwarding To forward a port enter the information on each line for the criteria required Descriptions of each criteria are described here Application n this field enter the name you wish to give the application Each name can be up to 12 characters Start End This is the port range Enter the numbe
8. usernames passwords instant message conversations emails account information and any data transmitted wirelessly can easily be seen by someone outside of your network because it is often broadcast in clear text Simply put any information transmitted on a wireless network leaves both the network and individual users vulnerable to attack All a hacker needs is a packet sniffer software available on the Internet along with other freeware or shareware hacking utilities available on the Internet to acquire your WEP keys and other network information to defeat security Jamming Attacks Jamming Attacks when a powerful signal is sent directly into your wireless network can effectively shut down your wireless network This type of attack is not always intentional and can often come about simply due to the technology This is especially possible in the 2 4 GHz frequency where phones baby monitors and microwave ovens can create a great deal of interference and jam transmissions on your wireless network One way to resolve this is by moving your wireless devices into the 5 GHz frequency which is dedicated solely to information transmissions 53 Active Attacks Hackers use Active Attacks for three purposes 1 stealing data 2 using your network and 3 modifying your network so it s easier to hack in the next time In an Active Attack the hacker has gained access to all of your network settings SSID WEP keys etc and is in your netw
9. you should be aware of the many ways they do this Every time a wireless transmission is broadcast signals are sent out from your wireless PC or access point but not always directly to its destination The receiving PC or access point can hear the signal because it is within that radius Just as with a cordless phone cellular phone or any kind of radio device anyone else within that radius who has their device set to the same channel or bandwidth can also receive those transmission Wireless networks are easy to find Hackers know that in order to join a wireless network your wireless PC will typically first listen for beacon messages These are identifying packets transmitted from the wireless network to announce its presence to wireless nodes looking to connect These beacon frames are unencrypted and contain much of the network s information such as the network s SSID Service Set Identifier and the IP address of the network PC or access point The SSID is analogous to the network s name With this information broadcast to anyone within range hackers are often provided with just the information they need to access that network One result of this seen in many large cities and business districts is called Warchalking This is the term used for hackers looking to access free bandwidth and free Internet access through your wireless network The marks they chalk into the city streets are well documented in the Internet and communicate exac
10. 25 alphanumeric characters Destination LANIP The Destination LAN IP is the address of the remote network or host to which you want to assign a static route Subnet Mask The Subnet Mask determines which portion of a Destination LAN IP address is the network portion and which portion is the host portion Default Gateway This is the IP address of the gateway device that allows for contact between the Router and the remote network or host Interface This interface tells you whether the Destination IP Address is on the LAN amp Wireless Ethernet and wireless networks the WAN Internet or Loopback a dummy network in which one PC acts like a network necessary for certain software programs Click the Show Routing Table button to view the Static Routes you ve already set up Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes G Broadband Router dband Router Ftertece LAN 8 Wireless C Show Roving Tabie Figure 6 14 Setup Tab Advanced Routing Router 21 The Wireless Tab Basic Wireless Settings The basic settings for wireless networking are set on this screen A Division of Cinco Systems ine Famas Verve vt 20 baire Wireless G Brosdband Router Wireless Wrreless Network Mode From this drop down menu you can select the wireless standards running on your network If you have both Wireless G and 802 11b devi
11. 3 4 These ports 1 2 3 4 connect the Broadband Router to your networked PCs and other Ethernet network devices Power The Power port is where you will connect the power adapter Important Resetting the Broadband Router will erase all of your settings WEP Encryption Wireless and LAN settings etc and replace them with the factory defaults Do not reset the Broadband Router if you want to retain these settings The Front Panel TheRouter s LEDs where information about network activity is displayed are located on the front panel Wireless G Broadband Router With 4 Port Switeh 1 2 3 4 Figure 3 2 The Broadband Routers Front Panel Green The Power LED lights up and will stay on while the Router is powered on When the Router goes through its self diagnosis mode during every boot up this LED will flicker stopping upon successful completion of the diagnosis Green The DMZLED indicates when the DMZ function is being utilized This LED will remain on as long as DMZ is enabled Green The WLANLED lights whenever there is a successful wireless connection If the LED is flickering the Broadband Router is actively sending or receiving data over the network Green These numbered LEDs corresponding with the numbered ports on the Broadband Router s back panel serve two purposes If the LED is continuously lit the Broadband Router is successfully connected to a device through that port A flickering LED indicates netw
12. Delak gateway Obtain DNS server address automatically Use the following DNS server addesses Prefened DNS server Atemate ONS server 13 Qverview The Broadband Router has been designed to be functional right out of the box with the default settings in the connecting the Router to your network This chapter is Setup Wizard However if you d like to change these settings use the Router s web based utility This chapter provided solely for those who wish to perform more will describe each web page in the Utility and each page s key functions The utility can be accessed via your web advanced configuration or monitoring browser through use of a computer connected to the Router For a basic network setup most users only have to use the following screens of the Utility Note The Router is designed to function properly after Have You Enabled TCP IP on your PCs PCs e Basic Setup On the Basic Setup screen enter the settings provided by your ISP A communicate over the network with this protocol Refer to Appendix D Windows Help for more e Management Click the Administrationtab and then the Management tab The Router s default password is information on TCP IP admin To secure the Router change the Password from its default There are seven main tabs Setup Wireless Security Access Restrictions Applications amp Gaming Connect to 192 168 1 1 Administration and Status Additional tabs will be available after you
13. G Broadband Router 36 Wireless G Broadband Router The Status Tab Wireless A Deveson of Caco yatea e The Wireless screen on the Status Tab displays the status of your wireless network Status MAC Address This is the Router s MAC Address as seen on your local wireless network Mode As selected from the Wireless tab this will display the wireless mode Mixed G Only or Disabled used by the network SSID As entered on the Wireless tab this will display the wireless network name or SSID Figure 6 39 Status Tab Wireless DHCP Server If you are using the Router as a DHCP server that will be displayed here Channel As entered on the Wireless tab this will display the channel on which your wireless network is broadcasting Encryption Function As selected on the Security Tab this will display what type of encryption the Router uses for security Chapter 6 Configuring the Wireless G Broadband Router The Status Tab Wireless 37 Appendix A Troubleshooting This appendix consists of two parts Common Problems and Solutions and Frequently Asked Questions Provided are possible solutions to problems that may occur during the installation and operation of the Router Read the descriptions below to help you solve your problems If you can t find an answer here check the Linksys website at www linksys com Conon Problems and Solutions 1 need to set a static IP address on a PC You can as
14. Internet Connection Type PPPoE v User Name linksys Password eeccccseccccccese O connect on Demand Max kile Time gt Min Keep Alive Redial Period 30 Sec Figure 6 5 PPPoE Connection Type static ip address a fixed address assigned to a computer or device connected to a network Internet Connection Type PPTP v internet P Address 63 205 134 71 Subnet Mask 255 255 2551 0 Gateway 0 0 0 0 User Name linksys Password ecccceceosesssso O Connect on Demand Max Idie Time Min Keep Alive Redial Period 30 Sec Figure 6 6 PPTP Connection Type 16 Optional Settings hey caer eens AEE Router Name WRT54G Some of these settings may be required by your ISP Verify with your ISP before making any changes Host Name Domain Name Router Name In this field you can type a name of up to 39 characters to represent the Router iii TRR Host Name Domain Name These fields allow you to supply a host and domain name for the Router Some ISPs Size 1492 usually cable ISPs require these names as identification You may have to check with your ISP to see if your Figure 6 7 Optional Settings broadband Internet service has been configured with a host and domain name In most cases leaving these fields blank will work IMPORTANT Restoring the Access Point s factory default settings will erase all of your settings mu MTU is the Maximum Transmission Unit It specifies the largest packet size permitted for Internet WEP Enc
15. Router The Wireless Tab Wireless MAC Filter Wireless access can be filtered by using the MAC addresses of the wireless devices transmitting within your network s radius Wireless MAC Filter To filter wireless users by MAC Address either permitting or preventing access click the radio button beside Enable If you do not wish to filter users by MAC Address select Disable Prevent Clicking this button will Prevent users access by MAC Address Permit Only Clicking this button will Permit users access by MAC Address Edit MAC Ackiress Filter List Clicking this button will open the MAC Address Filter List On this screen you can list users by MAC Address to whom you wish to provide or block access The Wireless Giient MAC List button will display network users by MAC Address for easy reference Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes Chapter 6 Conf The Wireless T Wireless G Broadband Router warses Wireless Wireless MAC fter Enabte O Disable Prevert Prevent PCs isted trom accessing the wireless network Pernt orty D Permi wireless network access to tose PCs isted ___ Edt MAC Address Fiter List Figure 6 16 Wireless Tab Wreless MAC Filter SD MAC Address Filter List Microsoft Internet Explorer MAC Address Filter List Enter MAC Address in this format xcoonxccccxxx Seve Setings CanceiChanges
16. anai Specily an IP address Figure 5 2 IP Address Tab 10 4 Now click the Gateway tab and verify that the Installed Gateway field is blank Click the axbutton 5 Click the a lt button again Windows may ask you for the original Windows installation disk or additional files Check for the files at c windows options cabs or insert your Windows CD ROM into your CD ROM drive and check the correct file location e g D win98 D win9x etc if D is the letter of your CD ROM drive 6 Windows may ask you to restart your PC Click the Yes button If Windows does not ask you to restart restart your computer anyway Go to Chapter 6 Using the Routers Web Based Utility Configuring Vindows 2000 PCs 1 Click the Start button Select Settings and click the Gontrol Panel icon Double click the Network and Dial up Connections icon 2 Select the Local Area Connection icon for the applicable Ethernet adapter usually it is the first Local Area Connection listed Double click the Local Area Connection Click the Properties button See Figure 5 3 3 Make sure the box next to Internet Protocol TCP IP is checked Highlight Internet Protocol TCP IP and click the Properties button See Figure 5 4 4 Select Obtain an IP address automatically Once the new window appears click the axbutton Click the axbutton again to complete the PC configuration See Figure 5 53 5 Restart your computer Goto Chapter 6 U
17. by default Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes The Administration Tab Log a The Router can keep logs of all traffic for your Internet connection To disable the Log function keep the default setting Disable To monitor traffic between the network and the Internet select Enable When you wish to view the logs click Incoming Log or Outgoing Log depending on which you wish to view Administration Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes Figure 6 31 Adiministration Tab Log Chapter 6 Configuring the Wireless G Broadband Router 32 The Administration Tab Management Wireless G Broadband Router The Ackministration Tab Diagnostics The diagnostic tests Ping and TraceRoute allow you to check the connections of your network components Wirelem m z Sere Administration Ping Test The Ping test will check the status of a connection Click the Ping button to open the Ping Test screen Enter the address of the PC whose connection you wish to test and how many times you wish to test it Then click the Ping button A successful test will look similar to that shown in Figure 5 33 To stop the test click the Stop button Click the Gear Log button to clear the screen Click the Gose button to return to the Diagnostics screen
18. click one of the main tabs To access the web based utility launch Internet Explorer or Netscape Navigator and enter the Router s default IP address 192 168 1 1 in the Address field Then press Enter A password request page shown in Figure 6 1 will appear non Windows XP users will see a similar screen Leave the User Name field blank The first time you open the Web Based Utility use the default password admin You can set a new password from the Administration tab s Management screen Then click the ax button Figure 6 1 Password Screen 14 band Router Wireless G Br The Setup Tab Basic Setup The first screen that appears displays the Setup tab This allows you to change the Broadband Router s general settings Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes Inbermet Setup The Internet Setup section configures the Broadband Router to your Internet connection Most of this information can be obtained through your ISP Internet Connection Type Choose the type of Internet connection your ISP provides from the drop down menu e DH By default the Router s Internet Connection Type is set to Automatic Configuration DHCP which should be kept only if your ISP supports DHCP or you are connecting through a dynamic IP address Static IP If you are required to use a permanent IP address to connect to the Internet se
19. expand the range of a wireless network Adapter This is a device that adds network functionality to your PC Acthoc A group of wireless devices communicating directly with each other peer to peer without the use of an access point Backbone The part of a network that connects most of the systems and networks together and handles the most data Bandwidth The transmission capacity of a given device or network Beacon Interval The frequency interval of the beacon which is a packet broadcast by a router to synchronize a wireless network Bit A binary digit Boot To start a device and cause it to start executing instructions Bridge A device that connects two different kinds of local networks such as a wireless network to a wired Ethernet network Broadband An always on fast Internet connection Browser A browser is an application program that provides a way to look at and interact with all the information on the World Wide Web 64 Buffer A block of memory that temporarily holds data to be worked on later when a device is currently too busy to accept the data Cable Modem A device that connects a computer to the cable television network which in turn connects to the Internet csmayca Carrier Sense Multiple Access Collision Avoidance A method of data transfer that is used to prevent data loss in a network crs Clear To Send A signal sent by a device to indicate that it is ready to receive data
20. or access point falls into the wrong hands Also should someone hack into your network there would be nothing preventing someone access to the entire network using just one static key 57 ass G Broadband Router The solution then is to segment your network up into multiple groups If your network had 80 users and you used four WEP keys a hacker would have access to only 1 4 of your wireless network resources In this way multiple keys reduce your liability Finally be sure to change your WEP key regularly once a week or once a day Using a dynamic WEP key rather than one that is static makes it even harder for a hacker to break into your network and steal your resources WEP Encryption WEP encryption for the Router is configured through the Web Utility s Security tab Select vP from the drop down menu of Security Mode which will open the WEP screen shown in Figure B 2 Select which WEP key 1 4 will be used when the Router sends data then select that number as the Default Transmit Key Make sure the receiving device is using the same key If you wish to use a WEP Passphrase it can be a maximum of 16 alphanumeric characters This passphrase may not work with non Linksys products due to possible incompatibility with other vendors passphrase generators The WEP Key can be generated using your Passphrase or you can enter it manually If you wish to enter the WEP Key manually type the key into the appropriate Key field on
21. settings If the port number that the data enters from does not have port forwarding then the Router will send the data to whichever PC or network device you set for DMZ hosting e Follow these steps to set DMZ hosting 1 2 3 4 Access the Router s web based utility by going to http 192 168 1 1 or the IP address of the Router Go to the Applications amp Gaming gt Port Forwarding tab Disable or remove the entries you have entered for forwarding Keep this information in case you want to use it at a later time Go to the Applications amp Gaming gt DMZ tab Select Enable next to DMZ In the DMZ Host IP Address field enter the IP address of the computer you want exposed to the Internet This will bypass the NAT technology for that computer Please refer to Appendix D Finding the MAC Address and IP Address for Your Ethernet Adapter for details on getting an IP address e Once completed with the configuration click the Apply button 10 1 forgot my password or the password prompt always appears when I am saving settings to the Router e Reset the Router to factory default by pressing the Reset button for 10 seconds and then releasing it If you are still getting prompted for a password when saving settings then perform the following steps 42 1 Access the Router s web based utility by going to http 192 168 1 1 or the IP address of the Router Enter the default password admin and click the Administrations
22. that information Change the administrator s password regularly 55 5 SSID There are a few things you can do to make your SSID more secure a Disable Broadcast b Make it unique c Change it often Most wireless networking devices will give you the option of broadcasting the SSID This is a option for convenience allowing anyone to log into your wireless network In this case however anyone includes hackers So don t broadcast the SSID A default SSID is set on your wireless devices by the factory The Linksys default SSID is linksys Hackers know these defaults and can check these against your network Change your SSID to something unique and not something related to your company or the networking products you use Changing your SSID regularly will force any hacker attempting to gain access to your wireless network to start looking for that new SSID With these three steps in mind please remember that while SSIDs are good for segmenting networks they fall short with regards to security Hackers can usually find them quite easily 6 MAC addresses Enable MAC address filtering if your wireless products allow it MAC address filtering will allow you to provide access to only those wireless nodes with certain MAC addresses This makes it harder for a hacker using a random MAC address or spoofing faking a MAC address 7 Firewalls Once a hacker has broken into your wireless network if it is connected to your wired network
23. they ll have access to that too This means that the hacker has effectively used your wireless network as a backdoor through your firewall which you ve put in place to protect your network from just this kind of attack via the Internet You can use the same firewall technology to protect your wired network from hackers coming in through your wireless network as you did for the Internet Rather than connecting your access point to an unprotected switch swap those out for a router with a built in firewall The router will show the access point coming in through its WAN port and its firewall will protect your network from any transmissions entering via your wireless network 56 PCs unprotected by a firewall router should at least run firewall software and all PCs should run up to date antiviral software B WEP Wired Equivalent Privacy WEP is often looked upon as a panacea for wireless security concerns This is overstating WEP s ability Again this can only provide enough security to make a hacker s job more difficult WEP encryption implementation was not put in place with the 802 11 standard This means that there are about as many methods of WEP encryption as there are providers of wireless networking products In addition WEP is not completely secure One piece of information still not encrypted is the MAC address which hackers can use to break into a network by spoofing or faking the MAC address Programs exist on the Internet tha
24. three DNS Server IP Addresses here The Router will use these for quicker access to functioning DNS servers WINS The Windows Internet Naming Service WINS manages each PC s interaction with the Internet If you use a WINS server enter that server s IP Address here Otherwise leave this blank Time Setting Change the time zone in which your network functions from this pull down menu You can even automatically adjust for daylight savings time Time Setting Time Zone GMT 08 00 Pacific Time USA amp Canada v Z Automatically adjust clock for daylight saving changes Figure 6 10 Time Setting 18 Wireless G Broadband Router The Setup Tab DDNS The Router offers a Dynamic Domain Name System DDNS feature DDNS lets you assign a fixed host and domain name to a dynamic Internet IP address It is useful when you are hosting your own website FTP server or other server behind the Router Before you can use this feature you need to sign up for DDNS service at www dyndns org or www TZ0 com DDNS service providers DDNS Service From this pull down menu enter the DDNS service with which you have membership User Name Enter the User Name for your DDNS account Password Enter the Password for your DDNS account Host Name The is the DDNS url assigned by the DDNS service Intemet IP Address This is the Router s current IP Address as seen on the Internet Status This displays the status of the DDNS connection Cha
25. LINKSYS A Division of Cisco Systems Inc 249Hz i Model No VWWRT54G Copyright and Trademarks Specifications are subject to change without notice Linksys is a registered trademark or trademark of Cisco Systems Inc and or its affiliates in the U S and certain other countries Copyright 2003 Cisco Systems Inc All rights reserved Other brands and product names are trademarks or registered trademarks of their respective holders How to Use this User Guide This User Gudie has been designed to make understanding networking with the Wireless G Broadband Router easier than ever Look for the following items when reading this User Guide This checkmark means there is a note of interest and is something you should pay special attention to while using the Wireless G Broadband Router This exclamation point means there is a caution or warning and is something that could damage your property or the Wireless G Broadband Router gt gt This question mark provides you with a reminder about something you might need to do while using the Wireless G Broadband Router In addition to these symbols there are definitions for technical terms that are presented like this word definition Also each figure diagram screenshot or other image is provided with a figure number and description like this Figure O 1 Sample Figure Description Figure numbers and descriptions can also be found in the List of Figu
26. LINKSYS LIABILITY EXCEED THE AMOUNT PAID BY YOU FOR THE PRODUCT The foregoing limitations will apply even if any warranty or remedy provided under this Section fails of its essential purpose Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to You Please direct all inquiries to Linksys P O Box 18558 Irvine CA 92623 USA 72 Appendix Regulatory Information FCC STATEMENT This Wireless G Broadband Router has been tested and complies with the specifications for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used according to the instructions may cause harmful interference to radio communications 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 is found 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 e Reorient or relocate the receiving antenna e Increase the separation between the equipment or device e Connect the equipment to an outlet other than the receiver s e Consult a dealer
27. Ly A Division ef Caco Systema tne Fomeare arman v3 20 Btn Wireless G Broadband Router Security J seconds Figure 6 22 Wreless Tab Wreless Security WPA Radius 27 Wireless G Broadband Router Radius WEP used in coordination with a RADIUS server This should only be used when a RADIUS server is connected to the Router First enter the RADIUS server s IP Address and port number along with a key shared between the Router and the server Then select a WEP key and a level of WEP encryption and either generate a WEP key through the Passphrase or enter the WEP key manually wep WEP is a basic encryption method not as secure as WPA To use WEP select a WEP key and a level of WEP encryption and either generate a WEP key through the Passphrase or enter the WEP key manually Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes For detailed instructions on configuring wireless security for the Router turn to Appendix B Wireless Security Chapter 6 Configuring the Wireless G Broadband Router The Security Tab Wireless Security hor 1 02 0304 WEP Encryntion G4bits 1Ohexdigts v Gonatan Genera Figure 6 23 Wreless Tab Wreless Security Radius Wireless G Broadband Router WRISKG ier 10203 048 WEP Enoryston G4bits 1Dhex digits v Figure 6 24 Wireless Tab Wireless Security WEP 28 Th
28. Overview What Are The Risks Maximizing Wireless Security Appendix C Upgrading Firmware Appendix D Windows Help Appendix E Finding the MAC Address and IP Address for Your Ethernet Adapter Windows 98 or Me Instructions Windows 2000 or XP Instructions For the Router s Web based Utility Appendix F Glossary Appendix G Specifications Appendix H Warranty Information Appendix Regulatory Information Appendix J Contact Information List of Figures Figure 3 1 The Broadband Router s Back Panel Figure 3 2 The Broadband Router s Front Panel Figure 4 1 Connecting Your Internet Connection Figure 4 2 Connecting Your Network Devices Figure 4 3 Connecting the Power Figure 5 1 Configuration Tab Figure 5 2 IP Address Tab Figure 5 3 Properties Figure 5 4 TCP IP Figure 5 5 IP Address Figure 5 6 Properties Figure 5 7 TCP IP Figure 5 8 IP Address Figure 6 1 Password Screen Figure 6 2 Setup Tab Basic Setup Figure 6 3 DHCP Connection Type Figure 6 4 Static IP Connection Type Figure 6 5 PPPoE Connection Type Figure 6 6 PPTP Connection Type Figure 6 7 Optional Settings Figure 6 8 Router IP Figure 6 9 Network Address Server Settings Figure 6 10 Time Setting Figure 6 11 Setup Tab DDNS Figure 6 12 Setup Tab MAC Address Clone Figure 6 13 Setup Tab Advanced Routing Gateway Figure 6 14 Setup Tab Advanced Routing Router Figure 6 15 Wireless Tab Basic Wireless Settings Figure 6 16 Wirel
29. P downloads If you are experiencing corrupted files when you download a file with your FTP client try using another FTP program The web page hangs downloads are corrupt or nothing but junk characters are being displayed on the screen What do I need to do Force your Ethernet adapter to 10Mbps or half duplex mode and turn off the Auto negotiate feature of your Ethernet adapter as a temporary measure Please look at the Network Control Panel in your Ethernet adapter s Advanced Properties tab Make sure that your proxy setting is disabled in the browser Check our website at www linksys com for more information If all else fails in the installation what can do Reset the Router by holding down the reset button until the Power LED fully turns on and off Reset your cable or DSL modem by powering the unit off and then on Obtain and flash the latest firmware release that is readily available on the Linksys website www linksys com How will I be notified of new Router firmware upgrades All Linksys firmware upgrades are posted on the Linksys website at www linksys com where they can be downloaded for free To upgrade the Router s firmware use the System tab of the Router s web based utility If the Router s Internet connection is working well there is no need to download a newer firmware version unless that version contains new features that you would like to use Downloading a more current version of Router firmware will n
30. RJ 45 Registered Jack 45 An Ethernet connector that holds up to eight wires Roaming The ability to take a wireless device from one access point s range to another without losing the connection Router A networking device that connects multiple networks together such as a local network and the Internet RTS Request To Send A packet sent when a computer has data to transmit The computer will wait for a CTS Clear To Send message before sending data Server Any computer whose function in a network is to provide user access to files printing communications and other services smip Simple Mail Transfer Protocol The standard e mail protocol on the Internet SNivP Simple Network Management Protocol A widely used network monitoring and control protocol Software Instructions for the computer A series of instructions that performs a particular task is called a program Spread Spectrum Wideband radio frequency technique used for more reliable and secure data transmission ssip Service Set IDentifier Your wireless network s name Static IP Address A fixed address assigned to a computer or device that is connected to a network Static Routing Forwarding data in a network via a fixed path Subnet Mask An address code that determines the size of the network Switch 1 Device that is the central point of connection for computers and other devices in a network so data can be shared at full transmission speeds
31. Router has been specifically designed for use with both your 802 11b and 802 119 products Now products using these standards can communicate with each other The Wireless G Broadband Router is compatible with all 802 11b and 802 119 adapters such at the PC Cards WPC54G WPC11 for your laptop computers PCI Card WMP54G for your desktop PC and USB Adapter WUSB11 for when you want to enjoy USB connectivity The Access Point will also communicate with the wireless PrintServer WPS11 and bridges WET11 WET54G When you wish to connect your wired network with your wireless network the Wireless G Broadband Router s LAN port can be connected to any of Linksys s switches such as the EZXS55W or EZXS88W or routers such as the BEFSR41 or BEFVP41 With these and many other Linksys products your networking options are limitless Go to the Linksys website at www linksys com for more information about products that work with the Wireless G Broadband Router The Back Panel The Broadband Router s ports where the cables are connected are located on the back panel Figure 3 1 The Broadband Router s Back Panel Reset Button There are two ways to reset the Broadband Router s factory defaults Either press the Reset Button for approximately ten seconds or restore the defaults from the Password tab in the Broadband Router s Web Based Utility Intemet The Internet port is where you will connect your broadband Internet connection 1 2
32. and some solutions to reduce the risks Appendix C Upgrading Firmware This appendix instructs you on how to upgrade the firmware on your Router if you should need to do so Appendix D Windows Help This appendix describes how you can use Windows Help for instructions about networking such as installing the TCP IP protocol Appendix E Finding the MAC Address and IP Address for your Ethernet Adapter This appendix describes how to find the MAC address for your computer s Ethenet adapter so you can use the MAC filtering and or MAC address cloning feature of the Router Appendix F Glossary This appendix gives a brief glossary of terms frequently used in networking Appendix G Specifications This appendix provides the technical specifications for the Router Appendix H Warranty Information This appendix supplies the warranty information for the Router Appendix l Regulatory Information This appendix supplies the regulatory information regarding the Router Appendix J Contact Information This appendix provides contact information for a variety of Linksys resources including Technical Support Chapter 2 Planning your Wireless Network Network Topology A wireless LAN is a group of computers each equipped with one Linksys wireless adapter Computers ina i wireless LAN must be configured to share the same radio channel LAN the computers and networking products that make up your local The Linksys wireless adapters provide ac
33. as shown on your computer screen See Figure C 2 This is the MAC address for your Ethernet adapter and is shown as a series of numbers and letters The MAC address Adapter Address is what you will use for MAC address cloning or MAC filtering The example in Figure C 3 shows the Ethernet adapter s IP address as 192 168 1 100 Your computer may show something different Note The MAC address is also called the Adapter Address Windows 2000 or XP Instructions 1 Click Start and Run In the Open field enter cma Press the Enter key or click the axbutton 2 Atthe command prompt enter ipconfig all Then press the Enter key LIP Contouation ao r Ethemet Adapter Information linksys LNE100TX Fast Etherne ys LNE100TX Fast Ethemet d f IPAddress 192168145 Subnet Mask 255 255 255 0 Default Gateway 192 168 1 254 Release Al Renew Al More Info gt gt Figure E 1 IP Configuration Screen oix p Ethernet Adapter Infomation Linksys LNE100TX Fast Ethemei gt IPAddress 192168 1 100 SubnetMask 255 255 2550 Defaut Gateway F a CE eseme Renew Release Al Renew Al More Info gt gt Figure E 2 MAC Acidiress Adapter 62 3 Write down the Physical Address as shown on your computer screen Figure C 3 it is the MAC address for your Ethernet adapter This appears as a series of numbers and letters The MAC address Physical Address is what you will use for MAC address c
34. bles which is why the network is called wired PCs equipped with wireless cards and adapters can communicate without cumbersome cables By sharing the same wireless settings within their transmission radius they form a wireless network This is sometimes called a WLANcess1 Tcrewvrrorkrs m 6 1 ean TJO 2 2048 TD079 TDO U 6 6 eso 0ot struea 2 5s ot c0 0003 2w th1 0 1 s9 i 0 2 r 8 db 8 5 el7 ss G B W e fr o2 r it up 17 fr 07 r 96 2 t 6de6 94 What s in this Guide This user guide covers the steps for setting up and using the Wireless B Media Adapter Chapter 1 Introduction This chapter describes the Adapter s applications and this User Guide Chapter 2 Planning your Wireless Network This chapter describes the basics of wireless networking Chapter 3 Getting to Know the Wireless G Broadband Router This chapter describes the physical features of the Router Chapter 4 Connecting the Wireless G Broadband Router This chapter instructs you on how to connect the Router to your network Chapter 5 Configuring the Wireless G Broadband Router This chapter explains how to use the Web Based Utility to configure the settings on theWireless G Broadband Router Appendix A Troubleshooting This appendix describes some problems and solutions as well as frequently asked questions regarding installation and use of the Wireless G Broadband Router Appendix B Wireless Security This appendix explains the risks of wireless networking
35. ces in your network keep the default setting Mixed If re you have only Wireless G devices select G Only If you have only Wireless B devices select B Gnly If you do not oman en have any Wireless G and 802 11b devices in your network select Disable Vireiess SSD Sroeccast Enable Disable Figure 6 15 Wireless Tab Basic Wireless Settings Wireless Network Name SSID The SSID is the network name shared among all points in a wireless network The SSID must be identical for all points in the wireless network It is case sensitive and must not exceed 32 characters use any of the characters on the keyboard Make sure this setting is the same for all points in your wireless network For added security you should change the default SSID linksys to a unique name Wireless Channel Select the appropriate channel from the list provided to correspond with your network settings All devices in your wireless network must be broadcast on the same channel in order to function correctly Wireless SSID Broadcast When wireless clients survey the local area for wireless networks to associate with they will detect the SSID broadcast by the Router To broadcast the Router s SSID keep the default setting Enable If you do not want to broadcast the Router s SSID then select Disable Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes Wireless G Broadband
36. cess to a wired LAN for wireless workstations An integrated wireless network and wired LAN is called an infrastructure configuration A group of Linksys wireless adapter users and a Wireless G Broadband Router compose a Basic Service Set BSS Each Linksys wireless adapter PC in a BSS can talk to any computer in a wired LAN infrastructure via the Wireless G Broadband Router An infrastructure configuration extends the accessibility of a Linksys wireless adapter PC to a wired LAN and doubles the effective wireless transmission range for two Linksys wireless adapter PCs Since the Wireless G Broadband Router is able to forward data within its BSS the effective transmission range in an infrastructure LAN is doubled Infrastructure a wireless network Roaming that is bridged to a wired network via re an access point Infrastructure mode also supports roaming capabilities for mobile users More than one BSS can be configured as an Extended Service Set ESS This continuous network allows users to roam freely within an ESS All PCs equipped with a Linksys wireless adapter within one ESS must be configured with the same ESS ID and use the same radio channel Before enabling an ESS with roaming capability choosing a feasible radio channel and optimum Wireless G Broadband Router position is recommended Proper router positioning combined with a clear radio signal will greatly enhance performance Network Layout The Wireless G Broadband
37. cryption and either generate a WEP key through the Passphrase or enter the WEP key manually Appendix B Wireless Security Maximizing Wireless Security Ly A Division of Caco Systems te Security LINKSYS A Division of Caco Systems te Security Wireless G Broadband Router 0 seconds Figure B 4 WPA Radius 1 20304 Figure B 5 Radius 59 The Access Point s firmware is upgraded through the Web Utility s Help tab Follow these instructions 1 Download the firmware from Linksys s website at www linksys com 2 Click Upgrade Finmware from the Web Utility s Administration tab and the Upgrade Firmware screen shown in Figure C 1 will appear 3 Enter the location of the firmware s file or click the Browse button to find the file 4 Then click the Upgrade button to upgrade the firmware Upgrade Firmware File Path _Browse Upgrade Warning Upgrading firmware may take a few minutes please don t turn off the power or press the reset button Figure C 1 Upgrade Finnware 60 All wireless products require Microsoft Windows Windows is the most used operating system in the world and comes with many features that help make networking easier These features can be accessed through Windows Help and are described in this appendix TCP IP Before a computer can communicate with the Access Point TCP IP must be enabled TCP IP is a set of instructions or protocol all PCs follow to commu
38. e Access Restrictions Tab Li A Dvin of Caes Systeme te The Access Restrictions tab allows you to block or allow network access as well as manage specific kinds of Access Internet usage Restrictions Intemet Access Policy Access is managed by a policy An access policy is established with the settings on this screen after Save Settings is clicked Selecting a policy from the drop down menu will display that policy s settings on this screen To delete a policy select that policy s number and click the Delete button To view the policies established click the View Summary button Policies can be deleted from the summary screen by selecting the policy or policies and clicking the Delete button Status Policies are automatically enabled To disable a policy which will cease it from functioning until you enable it once again click the radio button beside Disable Enter Policy Name Each policy can be named using no more than 30 characters so you can remember what it s for PGs Click the Edit List of PCs button to select which PCs will be affected by the policy You can enter the PC by MAC Address or IP Address You can also enter a range of IP Addresses if you wish this policy to affect a group of PCs After making your changes click the Save Settings button to apply your changes or Cancel Changes to cancel your changes Days Times When will this policy be in effect On every day At certain times Select the individual days or
39. ed does the exposed user share the public IP with the Router No Does the Router pass PPTP packets or actively route PPTP sessions The Router allows PPTP packets to pass through Is the Router cross platform compatible Any platform that supports Ethernet and TCP IP is compatible with the Router How many ports can be simultaneously forwarded Theoretically the Router can establish 520 sessions at the same time but you can only forward 10 ranges of ports What are the advanced features of the Router The Router s advanced features include Advanced Wireless settings Filters Port Forwarding Routing and DDNS How do I get mIRC to work with the Router Under the Port Forwarding tab set port forwarding to 113 for the PC on which you are using mIRC Can the Router act as my DHCP server Yes The Router has DHCP server software built in Can run an application from a remote computer over the wireless network This will depend on whether or not the application is designed to be used over a network Consult the application s documentation to determine if it supports operation over a network What is the IEEE 802 119 standard It is one of the IEEE standards for wireless networks The 802 11g standard allows wireless networking hardware from different manufacturers to communicate provided that the hardware complies with the 802 119 standard The 802 11g standard states a maximum data transfer rate of 54Mbps and an operating freq
40. eless Settings 26 Wrreless G Broadband Router The Security Tab Wireless Security The Wireless Security settings configure the security of your wireless network There are four wireless security mode options supported by the Router WPA RADIUS and WEP These four are briefly discussed here For detailed instructions on configuring wireless security for the Router turn to Appendix B Wireless Security WPA Pre Shared Key WPA gives you two encryption methods TKIP and AES with dynamic encryption keys Select the type of algorithm TKIP or AES enter a Pre Shared key of 8 32 characters and enter a Group Key Renewal period which instructs the Router how often it should change the encryption keys WPA Radius WPA used in coordination with a RADIUS server This should only be used when a RADIUS server is connected to the Router First select the type of WPA algorithm TKIP or AES Enter the RADIUS server s IP Address and port number along with a key shared between the Router and the server Last enter a Group Key Renewal period which instructs the Router how often it should change the encryption keys Chapter 6 Configuring the Wireless G Broadband Router The Security Tab Wireless Security A Divtsan of Onco Systems me Wireless G Broadband Router WISG Security Society Mode WPA Pre Shared Key Waagiae TKP WPA Shared Key d seconds Figure 6 21 Wreless Tab Wreless Security WPA Pre Shared Key
41. ending on the speed of your wireless network You can select from a range of transmission speeds or you can select Auto to have the Router automatically use the fastest possible data rate and enable the Auto Fallback feature Auto Fallback will negotiate the best possible connection speed between the Router and a wireless client The default value is Auto CTS Protection Mode This should remain disabled unless having severe problems with your Wireless G products not being able to transmit to the Router This function boosts the Router s ability to catch all 802 11b and Wireless G transmissions but will severely decrease performance Frame Burst Enabling this option should provide your network with greater performance varying upon the manufacturer of your wireless products Beacon Interval The default value is 100 Enter a value between 1 and 65 535 milliseconds The Beacon Interval value indicates the frequency interval of the beacon A beacon is a packet broadcast by the Router to synchronize the wireless network DMM Interval This value between 1 and 16384 indicates the interval of the Delivery Traffic Indication Message DTIM A DTIM field is a countdown field informing clients of the next window for listening to broadcast and multicast messages When the Router has buffered broadcast or multicast messages for associated clients it sends the next DTIM with a DTIM Interval value Its clients hear the beacons and awaken to receive the broadcas
42. ernon 1 20 Bowe Wireless G Broadband Router Security Seourty Mode WEP Stet 8102 03 Ot Ker Wer Encryption 64 bits 1Wheaxdigits v Generate Seve Setnge Cancel Guonges Figure B 2 WEP A Division of Oseo Satama tne Wireless G Broadband Router WRIStG Security Securty Mode WPA Pre Shored Key WeAAgotras TKP Figure B 3 Pre Shared Key 58 Wireless G Broadband Router WPA Pre Shared Key If you do not have a RADIUS server Select the type of algorithm TKIP or AES enter a password in the Pre Shared key field of 8 32 characters and enter a Group Key Renewal period time between 0 and 99 999 seconds which instructs the Router how often it should change the encryption keys WPA RADIUS WPA used in coordination with a RADIUS server This should only be used when a RADIUS server is connected to the Router First select the type of WPA algorithm TKIP or AES Enter the RADIUS server s IP Address and port number along with a key shared between the Router and the server Last enter a Group Key Renewal period which instructs the Router how often it should change the encryption keys RADIUS WEP used in coordination with a RADIUS server This should only be used when a RADIUS server is connected to the Router First enter the RADIUS server s IP Address and port number along with a key shared between the Router and the server Then select a WEP key and a level of WEP en
43. ess Tab Wireless MAC Filter Figure 6 17 MAC Address Filter List Figure 6 18 Wireless Tab Advanced Wireless Settings Figure 6 19 Security Tab Firewall Figure 6 20 Wireless Tab Basic Wireless Settings Figure 6 21 Wireless Tab Wireless Security WPA Pre Shared Key Figure 6 22 Wireless Tab Wireless Security WPA Radius Figure 6 23 Wireless Tab Wireless Security Radius Figure 6 24 Wireless Tab Wireless Security WEP Figure 6 25 Access Restrictions Tab Figure 6 26 Internet Policy Summary Figure 6 27 List of PCs Figure 6 28 Applications and Gaming Tab Port Range Forward Figure 6 29 Applications and Gaming DMZ Figure 6 30 Administration Tab Management Figure 6 31 Administration Tab Log Figure 6 32 Administration Tab Diagnostics Figure 6 33 The Ping Test Figure 6 34 The Traceroute Test Figure 6 35 Administration Tab Factory Defaults Figure 6 36 Administration Tab Firmware Upgrade Figure 6 37 Status Tab Router Figure 6 38 Status Tab Local Network Figure 6 39 Status Tab Wireless Figure B 1 Warchalking Figure B 2 WEP Figure B 3 Pre Shared Key Figure B 4 WPA Radius Figure B 5 Radius Figure B 6 802 11b WEP Key Setting Figure B 7 WEP Figure B 8 802 11b WEP Key Setting Figure B 9 WEP Figure B 10 802 11b WEP Key Setting Figure B 11 802 11b WEP Key Setting Figure B 12 WEP Figure B 13 802 11b WEP Key Setting Figure C 1 Upgrade Firmware Figure E 1 IP C
44. he computer to the Internet Any PC whose port is being forwarded must have its DHCP client function disabled and should have a new static IP address assigned to it because its IP address may change when using the DHCP function To expose one PC select Enable Then enter the computer s IP address in the DMZ Host IP Address field Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes A Division of Osco Systema tne Wireless G Broadband Router Applications amp Gaming Figure 6 29 Applications and Gaming DMZ war sG 31 Wrreless G Broadband Router The Ackministration Tab Management a This section of the Administration tab allows the network s administrator to manage specific Router functions for _ access and security Administration Local Router Access You can change the Router s password from here Enter a new Router password and then type it again in the Re enter to confirmfield to confirm Remote Router Access To access the Router remotely from outside the network verify that Enableis selected Then enter the port number that will be open to outside access You will need to enter the Router s password when accessing the Router this way as usual Figure 6 30 Adrrinistration Tab Management uPnP When using UPnP features select Enable As allowing this may present a risk to security this feature is disabled
45. iguring the Wireless G Broadband Router The Status Tab Router LINKSYS Division of Osco Stems ine Status Configu ation Type Logn Status Connectea Disconnect P Astes GMIN Seret Mast ISS258 255 255 Deta Gateway 3 205 135 254 Primary ONS 206 13 29 12 Secondary ONS 206 13 30 12 35 Wrreless G Broadband Router The Status Tab Local Network A Division of Caco Systems tne The Local Network screen on the Status Tab displays the status of your network Status MAC Address This is the Router s MAC Address as seen on your local Ethernet network a See Serge IP Address This shows the Router s IP Address as it appears on your local Ethernet network coe i Subnet Mask When the Router is using a Subnet Mask it is shown here L DHCP Server If you are using the Router as a DHCP server that will be displayed here Start IP Address For the range of IP Addresses used by points on your local Ethernet network the beginning of Figure 6 38 Status Tab Local Network that range is shown here End IP Address For the range of IP Addresses used by points on your local Ethernet network the end of that range is shown here DHCP Cients Table Clicking this button will open a screen to show you which PCs are utilizing the Router as a DHCP server You can delete PCs from that list and sever their connections by checking a Delete box and clicking the Delete button figuring t ab Local N ss
46. ind information about a product you want to buy on the web Do you want to know more about networking with Linksys products Give our advice line a call at 800 546 5797 LINKSYS Or fax your request in to 949 261 8868 If you experience problems with any Linksys product you can call us at 800 326 7114 Don t wish to call You can e mail us at support linksys com If any Linksys product proves defective during its warranty period you can call the Linksys Return Merchandise Authorization department for obtaining a Return Authorization Number at 949 261 1288 Details on Warranty and RMA issues can be found in the Warranty Information section in this Guide 76
47. ke sure Obtain an IP address automatically is selected in the TCP IP settings for your Ethernet adapter 39 C Inthe command prompt type ping followed by your Internet or WAN IP address and press the Enter key The Internet or WAN IP Address can be found on the Status screen of the Router s web based utility For example if your Internet or WAN IP address is 1 2 3 4 you would enter ping 1 2 3 4 and press the Enter key e If you get a reply the computer is connected to the Router e If you do NOT get a reply try the ping command from a different computer to verify that your original computer is not the cause of the problem In the command prompt type ping www yahoo com and press the Enter key e If you get a reply the computer is connected to the Internet If you cannot open a webpage try the ping command from a different computer to verify that your original computer is not the cause of the problem e If you do NOT get a reply there may be a problem with the connection Try the ping command from a different computer to verify that your original computer is not the cause of the problem 5 Iam not getting an IP address on the Internet with my Internet connection e Refer to Problem 2 want to test my Internet connection to verify that you have connectivity 1 If you need to register the MAC address of your Ethernet adapter with your ISP please see Appendix D Finding the MAC address and IP Address for Your Ethernet Adapte
48. ke sure that your browser is set to connect directly and that any dial up is disabled For Internet Explorer click Tools Intemet Options and then the Gonnection tab Make sure that Internet Explorer is set to Never dial a connection For Netscape Navigator click Edit Preferences Advanced and Proxy Make sure that Netscape Navigator is set to Direct connection to the Internet Frequently Asked Questions What is the maximum number of IP addresses that the Router will support The Router will support up to 253 IP addresses Is IPSec Pass Through supported by the Router Yes it is a built in feature that the Router automatically enables Where is the Router installed on the network In a typical environment the Router is installed between the cable DSL modem and the LAN Plug the Router into the cable DSL modem s Ethernet port Does the Router support IPX or AppleTalk No TCP IP is the only protocol standard for the Internet and has become the global standard for communications IPX a NetWare communications protocol used only to route messages from one node to another and AppleTalk a communications protocol used on Apple and Macintosh networks can be used for LAN to LAN connections but those protocols cannot connect from the Internet to a LAN 45 Does the Internet connection of the Router support 100Mbps Ethernet The Router s current hardware design supports up to 100Mbps Ethernet on its Internet port however the Internet co
49. l the information be intercepted while it is being transmitted through the air WLAN features two fold protection in security On the hardware side as with Direct Sequence Spread Spectrum technology it has the inherent security feature of scrambling On the software side WLAN offers the encryption function WEP to enhance security and access control What is WEP WEP is Wired Equivalent Privacy a data privacy mechanism based on a 64 bit or 128 bit shared key algorithm as described in the IEEE 802 11 standard What is a MAC Address The Media Access Control MAC address is a unique number assigned by the manufacturer to any Ethernet networking device such as a network adapter that allows the network to identify it at the hardware level For all practical purposes this number is usually permanent Unlike IP addresses which can change every time a computer logs onto the network the MAC address of a device stays the same making it a valuable identifier for the network How do reset the Router Press the Reset button on the back panel for about ten seconds This will reset the Router to its default settings 50 How do I resolve issues with signal loss There is no way to know the exact range of your wireless network without testing Every obstacle placed between the Router and a wireless PC will create signal loss Lead glass metal concrete floors water and walls will inhibit the signal and reduce range Start with the Router and yo
50. lect Static IP Internet IP Address This is the Router s IP address when seen from the Internet Your ISP will provide you with the IP Address you need to specify here Subnet Mask This is the Router s Subnet Mask as seen by users on the Internet including your ISP Your ISP will provide you with the Subnet Mask Gateway Your ISP will provide you with the Gateway Address which is the ISP server s IP address DNS Your ISP will provide you with at least one DNS Domain Name System Server IP Address 2less G Broadband Router Wnermet Setup internet Connection Type Opaionsi Settings required by some t5P0 Hetwork Adti one Server Semtings DHCP Loep adrese 192 268 1 2 Soret Maa 255 255 255 0 OHO Server Enable Disable Siro P Adret 192 168 1 100 Maximum anter of g ONO Users CurtlemetTne O minses 0 means one dey Ses fe j e e Date ONS 2 o o 0 l6 Sate One fe j le jlo 6 ves f Tre lore GMT 08 09 Pecific Time USA amp Canada x Cl Antonaicaty sdm doct for dayipt raving changes Figure 6 2 Setup Tab Basic Setup Internet Connection Type Automatic Configuration DHCP v Figure 6 3 DHCP Connection Type Internet Connection Type Static IP v Internet IP Address 63 205 134 71 Subnet Mask 255 255 255 0 Gateway 63 205 135 254 ONS Required 4 0 0 10 0 Figure 6 4 Static IP Connection Type subnet mask An address code that determines the size
51. loning or MAC filtering Note The MAC address is also called the Physical Address The example in Figure C 3 shows the Ethernet adapter s IP address as 192 168 1 100 Your computer may show something different For the Routers Web based Utility Figure E 3 MAC Adkdress Physical Address For MAC filtering enter the 12 digit MAC address in this format XXXXXXXXXXXX WITHOUT the hyphens See MAC Access Control Table Microsoft Internetin an Figure C 4 Filtered MAC Address m0 For MAC address cloning enter the 12 digit MAC address in the MAC Address fields provided two digits per field ee x See Figure C 5 mac 3 o mac 4 0 mac ii mac i m E Apply Undo a Figure E 4 MAC Adidress Filter Fren aan 2 Etherisss Cable DSL Router msan vi Figure E 5 MAC Acidress Clone Appendix F Glossary 802 11 An IEEE wireless networking standard that specifies a maximum data transfer rate of 54Mbps and an operating frequency of 5GHz 802 11b An IEEE wireless networking standard that specifies a maximum data transfer rate of 11Mbps and an operating frequency of 2 4GHz 802 11g An IEEE wireless networking standard that specifies a maximum data transfer rate of 54Mbps an operating frequency of 2 4GHz and backward compatibility with 802 11b devices Access Point Device that allows wireless equipped computers and other devices to communicate with a wired network Also used to
52. nge these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes ess G Broadband Router Formez VArsion vi 320 Seton Wireless G Broadband Router Figure 6 11 Setup Tab DDNS 19 band Router Wireless G Br The Setup Tab MAC Acicdress Clone A MAC address is a 12 digit code assigned to a unique piece of hardware for identification Some ISPs will require you to register a MAC address in order to access the Internet If you do not wish to re register the MAC address with your ISP you may assign the MAC address you have currently registered with your ISP to the Router with the MAC Address Clone feature Enable Disable To have the MAC Address cloned click the radio button beside Enable User Defined Entry Enter the MAC Address registered with your ISP here done Your PC s MAC Ackiress Clicking this button will clone the MAC address Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes G Broadband Router Wireless G Broadband Router User Detred rary 00 90 4C 21 00 2B Figure 6 12 Setup Tab MAC Acidress done 20 The Setup Tab Acivanced Routing This tab is used to set up the Router s advanced functions Operating Mode allows you to select the type s of advanced functions you use Dynamic Routing will automatically adjust how packets
53. ngs In other words the Router will revert to its original factory configuration 13 1 need to upgrade the firmware In order to upgrade the firmware with the latest features you need to go to the Linksys website and download the latest firmware at www linksys com e Follow these steps 1 Go to the Linksys website at http www linksys com and download the latest firmware 2 To upgrade the firmware follow the steps in Appendix C Upgrading Firmware 14 The firmware upgrade failed and or the Power LED is flashing The upgrade could have failed for a number of reasons Follow these steps to upgrade the firmware and or make the Power LED stop flashing e If the firmware upgrade failed use the TFTP program it was downloaded along with the firmware Open the pdf that was downloaded along with the firmware and TFTP program and follow the pdf s instructions 43 e Seta static IP address on the PC refer to Problem 1 I need to set a static IP address Use the following IP address settings for the computer you are using IP Address 192 168 1 50 Subnet Mask 255 255 255 0 Gateway 192 168 1 1 e Perform the upgrade using the TFTP program or the Router s web based utility through its System tab 15 My DSL service s PPPoE is always disconnecting PPPoE is not actually a dedicated or always on connection The DSL ISP can disconnect the service after a period of inactivity just like a normal phone dial up connection to the In
54. nicate over a network This is true for wireless networks as well Your PCs will not be able to utilize wireless networking without having TCP IP enabled Windows Help provides complete instructions on enabling TCP IP Shared Resources If you wish to share printers folder or files over your network Windows Help provides complete instructions on utilizing shared resources Network Neighborhood My Network Places Other PCs on your network will appear under Network Neighborhood or My Network Places depending upon the version of Windows you re running Windows Help provides complete instructions on adding PCs to your network 61 Appendix E Finding the MAC Address and IP Address for Your This section describes how to find the MAC address for your computer s Ethernet adapter so you can use the MAC filtering and or MAC address cloning feature of the Router You can also find the IP address of your computer s Ethernet adapter This IP address is used for the Router s filtering forwarding and or DMZ features Follow the steps in this appendix to find the adapter s MAC or IP address in Windows 98 Me 2000 or XP Windows 98 or Me Instructions 1 Click Start and Run In the Open field enter winipcfg Then press the Enter key or the axbutton 2 When the P Configuration screen appears select the Ethernet adapter you have connected to the Router via a CAT 5 Ethernet network cable See Figure C 1 3 Write down the Adapter Address
55. nnection speed will vary depending on the speed of your broadband connection The Router also supports 100Mbps over the auto sensing Fast Ethernet 10 100 switch on the LAN side of the Router What is Network Address Translation and what is it used for Network Address Translation NAT translates multiple IP addresses on the private LAN to one public address that is sent out to the Internet This adds a level of security since the address of a PC connected to the private LAN is never transmitted on the Internet Furthermore NAT allows the Router to be used with low cost Internet accounts such as DSL or cable modems when only one TCP IP address is provided by the ISP The user may have many private addresses behind this single address provided by the ISP Does the Router support any operating system other than Windows 98 Windows Millennium Windows 2000 or Windows XP Yes but Linksys does not at this time provide technical support for setup configuration or troubleshooting of any non Windows operating systems Does the Router support ICQ send file Yes with the following fix click ICQ menu gt preference gt connections tab gt and check am behind a firewall or proxy Then set the firewall time out to 80 seconds in the firewall setting The Internet user can then send a file to a user behind the Router I set up an Unreal Tournament Server but others on the LAN cannot join What do I need to do If you have a dedicated Unreal To
56. node undertakes a search for the best possible access to the system First it evaluates such factors as signal strength and quality as well as the message load currently being carried by each access point and the distance of each access point to the wired backbone Based on that information the node next selects the right access point and registers its address Communications between end node and host computer can then be transmitted up and down the backbone As the user moves on the end node s RF transmitter regularly checks the system to determine whether it is in touch with the original access point or whether it should seek a new one When a node no longer receives acknowledgment from its original access point it undertakes a new search Upon finding a new access point it then re registers and the communication process continues What is ISM band The FCC and their counterparts outside of the U S have set aside bandwidth for unlicensed use in the ISM Industrial Scientific and Medical band Spectrum in the vicinity of 2 4 GHz in particular is being made available worldwide This presents a truly revolutionary opportunity to place convenient high speed wireless capabilities in the hands of users around the globe 49 What is Spread Spectrum Spread Spectrum technology is a wideband radio frequency technique developed by the military for use in reliable secure mission critical communications systems It is designed to trade off band
57. o connect to Usenet groups on the Internet Node A network junction or connection point typically a computer or work station OFDM Orthogonal Frequency Division Multiplexing A type of modulation technology that separates the data stream into a number of lower speed data streams which are then transmitted in parallel Used in 802 11a 802 119 and powerline networking Packet A unit of data sent over a network Passphrase Used much like a password a passphrase simplifies the WEP encryption process by automatically generating the WEP encryption keys for Linksys products Ping Packet INternet Groper An Internet utility used to determine whether a particular IP address is online Pops Post Office Protocol 3 A standard protocol used to retrieve e mail stored on a mail server Port 1 The connection point on a computer or networking device used for plugging in a cable or an adapter 2 The virtual connection point through which a computer uses a specific application on a server 67 PPPoE Point to Point Protocol over Ethernet A type of broadband connection that provides authentication username and password in addition to data transport PPTP Point to Point Tunneling Protocol A VPN protocol that allows the Point to Point Protocol PPP to be tunneled through an IP network This protocol is also used as a type of broadband connection in Europe Preamble Part of the wireless signal that synchronizes network traffic
58. o host Unreal Tournament UT you would enter the range 7777 to 27900 4 Check the protocol you will be using TCP and or UDP 5 Enter the IP address of the PC or network device that you want the port server to go to For example if the web server s Ethernet adapter IP address is 192 168 1 100 you would enter 100 in the field provided Check Appendix D Finding the MAC Address and IP Address for Your Ethernet Adapter for details on getting an IP address 6 Check the Enable option for the port services you want to use Consider the example below Customized External Port TCP UDP IP Address Enable Application UT 7777 to 27900 X X 192 168 1 100 X Halflife 27015 to 27015 X X 192 168 1 105 X PC Anywhere 5631 to 5631 X 192 168 1 102 X VPN IPSEC 500 to 500 X 192 168 1 100 X When you have completed the configuration click the Save Settings button 9 I can t get the Internet game server or application to work If you are having difficulties getting any Internet game server or application to function properly consider exposing one PC to the Internet using DeMilitarized Zone DMZ hosting This option is available when an application requires too many ports or when you are not sure which port services to use Make sure you disable all the forwarding entries if you want to successfully use DMZ hosting since forwarding has priority over DMZ hosting In other words data that enters the Router will be checked first by the forwarding
59. of the network 15 PPPoE Some DSL based ISPs use PPPoE Point to Point Protocol over Ethernet to establish Internet connections If you are connected to the Internet through a DSL line check with your ISP to see if they use PPPoE If they do you will have to enable PPPoE User Name and Password Enter the User Name and Password provided by your ISP Connect on Demand Max Idle Time You can configure the Router to cut the Internet connection after it has been inactive for a specified period of time Max Idle Time If your Internet connection has been terminated due to inactivity Connect on Demand enables the Router to automatically re establish your connection as soon as you attempt to access the Internet again If you wish to activate Connect on Demand click the radio button In the Max Idle Time field enter the number of minutes you want to have elapsed before your Internet connection terminates Keep Alive Option Redial Period If you select this option the Router will periodically check your Internet connection If you are disconnected then the Router will automatically re establish your connection To use this option click the radio button next to Keep Alive In the Redial Period field you specify how often you want the Router to check the Internet connection The default Redial Period is 30 seconds PPTP Point to Point Tunneling Protocol PPP is a service that applies to connections in Europe only Specify Internet IP Addres
60. on See Figure 5 6 3 Make sure the box next to Internet Protocol TCP IP is checked Highlight Intermet Protocol TCP IP and Click the Properties button See Figure 5 7 4 Select Obtain an IP address automatically See Figure 5 8 Once the new window appears click the aK button Click the axbutton again to complete the PC configuration Go to Chapter 6 Using the Routers Web Based Utility h Local Area Connection 39 Status Xf General Support Connection Status Connected Duration 2 days 02 56 16 Speed 100 0 Mbps Activity Sent Received Packets 23 058 25 300 Properties operties Disable _ able L Local Area Connection 39 Properties General Authentication Advanced C 3 Linksys LNE100TX Fast Ethemet Adapter LNE100TX v4 This connection uses the following items M IE Client for Microsoft Networks M J Fie and Printer Sharing for Microsoft Networks Ay Description Transmission Control Protocol intemet Protocol The defaut wide area network protocol that provides communication across diverse interconnected networks E Show icon in notification area when connected Figure 5 7 TCP IP 12 Wrreless G Broadband Router Chapter 5 Configuring the PCs Configuring Windows XP PCs You can get IP settings assigned automatically if your network supports this capability Otherwise you need to ask your network administrator for the appropriate IP settings
61. on a wireless network that you wouldn t put on the Internet 2 Network Layout When you first lay out your network keep in mind where your wireless PCs are going to be located and try to position your access point s towards the center of that network radius Remember that access points transmit indiscriminately in a radius placing an access point at the edge of the physical network area reduces network performance and leaves an opening for any hacker smart enough to discover where the access point is transmitting This is an invitation for a man in the middle attack as described in the previous section To perform this type of attack the hacker has to be physically close to your network So monitoring both your network and your property is important Furthermore if you are suspicious of unauthorized network traffic most wireless products come with a log function with which you can view activity on your network and verify if any unauthorized users have had access 3 Network Devices With every wireless networking device you use keep in mind that network settings SSID WEP keys etc are stored in its firmware If they get into the hands of a hacker so do all of your settings So keep an eye on them 4 Adninistrator passwords Your network administrator is the only person who can change network settings If a hacker gets a hold of the administrator s password he too can change those settings So make it harder for a hacker to get
62. onfiguration Screen Figure E 2 MAC Address Adapter Address Figure E 3 MAC Address Physical Address Figure E 4 MAC Address Filter Figure E 5 MAC Address Clone Chapter 1 Introduction elcome Thank you for choosing the Linksys Wireless G Broadband Router The Wireless G Broadband Router will allow you to network wirelessly better than ever sharing Internet Access files and fun easily and securely How does the Wireless G Broadband Router do all of this A router is a device that allows access to an Internet connection over a network With the Wireless G Broadband Router this access can be shared over the four switched ports or over via the wireless broadcast at either 11Mbps Wireless B or 54Mbps Wireless G In addition the Wireless G standard provides greater security opportunities while the router s switched ports are protected through Stateful Packet Inspection SPI and a NAT firewall All of these security features as well as full configurability is accessed through the easy to use browser based utility But what does all of this mean Networks are useful tools for sharing computer resources You can access one printer from different computers and access data located on another computer s hard drive Networks are even used for playing multiplayer video games So networks are not only useful in homes and offices they can also be fun PCs on a wired network create a LAN or Local Area Network They are connected with Ethernet ca
63. ops networking standards Infrastructure Currently installed computing and networking equipment Infrastructure Mode Configuration in which a wireless network is bridged to a wired network via an access point IP Internet Protocol A protocol used to send data over a network IP Ackiress The address used to identify a computer or device on a network 66 IPCONHG A Windows 2000 and XP utility that displays the IP address for a particular networking device IPSec Internet Protocol Security A VPN protocol used to implement secure exchange of packets at the IP layer ISM band Radio band used in wireless networking transmissions ISP Internet Service Provider A company that provides access to the Internet LAN Local Area Network The computers and networking products that make up the network in your home or Office mac Media Access Control Address The unique address that a manufacturer assigns to each networking device Mbps Megabits Per Second One million bits per second a unit of measurement for data transmission Multicasting Sending data to a group of destinations at once NAT Network Address Translation NAT technology translates IP addresses of a local area network to a different IP address for the Internet Network A series of computers or devices connected for the purpose of data sharing storage and or transmission between users Nip Network News Transfer Protocol The protocol used t
64. or an experienced radio TV technician for assistance INDUSTRY CANADA CANADA This Class B digital apparatus complies with Canadian ICES 003 Cet appareil num rique de la classe B est conforme a la norme NMB 003 du Canada The use of this device in a system operating either partially or completely outdoors may require the user to obtain a license for the system according to the Canadian regulations EC DECLARATION OF CONFORMITY EUROPE Linksys Group declares that the Instant Wireless Series products included in the Instant Wireless Series conform to the specifications listed below following the provisions of the EMC Directive 89 336 EEC and Low Voltage Directive 73 23 EEC ETS 300 826 301 489 1 General EMC requirements for Radio equipment EN 609 50 Safety 73 Italia I E necessaria la concessione ministeriale anche per l uso interno Verificare con i rivenditori la procedura da seguire L uso per installazione in esterni non e permessa Italy I License required for indoor use Use with outdoor installations not allowed the Netherlands NL License required for outdoor installations Check with reseller for procedure to follow Nederlands NL Licentie verplicht voor gebruik met buitenantennes Neem contact op met verkoper voor juiste procedure 75 Need to contact Linksys Visit us online for information on the latest products and updates to your existing products at http www linksys com or ftp linksys com Can t f
65. ork Once in your wireless network the hacker has access to all open resources and transmitted data on the network In addition if the wireless network s access point is connected to a switch the hacker will also have access to data in the wired network Further spammers can use your Internet connection and your ISP s mail server to send tens of thousands of e mails from your network without your knowledge Lastly the hacker could make hacking into your network even easier by changing or removing safeguards such as MAC address filters and WEP encryption He can even steal passwords and user names for the next time he wants to hack in Dictionary Building or Table Attacks Dictionary building or Table attacks is a method of gaining network settings SSID WEP keys etc by analyzing about a day s worth of network traffic mostly in the case of business networks Over time the hacker can build up a table of network data and be able to decrypt all of your wireless transmissions This type of attack is more effective with networks that transmit more data such as businesses Man in the Middle Attacks A hacker doesn t need to log into your network as a user he can appear as one of the network s own access points setting himself up as the man in the middle To do this the hacker simply needs to rig an access point with your network s settings and send out a stronger signal that your access point In this way some of your network s PCs ma
66. ork activity over that port Green The tntemet LED indicates when a successful connection is made through the Internet port Chapter 4 Connecting the Wireless G Broadband Router Hardware Installation 1 Locate an optimum location for the Broadband Router The best place for the Broadband Router is usually at the center of your wireless network with line of sight to all of your mobile stations 2 Fix the direction of the antenna Try to place it in a position that will best cover your wireless network Normally the higher you place the antenna the better the performance will be The antenna s position enhances the receiving sensitivity 3 Connect a standard Ethernet network cable to the Broadband Router s Internet port Then connect the other end of the Ethernet cable to your Cable or DSL Broadband modem nternet Figure 4 1 Connecting Your Intermet Connection 4 Connect your network PCs or Ethernet devices to one of the Broadband Router s numbered ports with a standard Ethernet network cable Figure 4 2 Connecting Your Network Devices 5 Connect the AC Power Adapter to the Broadband Router s Power Socket and the other end into an electrical that is supplied with the Router Use of a different outlet Only use the power adapter supplied with the Broadband Router Use of a different adapter may result power adapter could damage the Router in product damage A IMPORTANT Make sure to use the power adapter Fig
67. ot enhance the quality or speed of your Internet connection and may disrupt your current connection stability Will the Router function in a Macintosh environment Yes but the Router s setup pages are accessible only through Internet Explorer 4 0 or Netscape Navigator 4 0 or higher for Macintosh l am not able to get the web configuration screen for the Router What can I do You may have to remove the proxy settings on your Internet browser e g Netscape Navigator or Internet Explorer Or remove the dial up settings on your browser Check with your browser documentation and make sure that your browser is set to connect directly and that any dial up is disabled Make sure that your browser is set to connect directly and that any dial up is disabled For Internet Explorer click Tools Internet Options and then the Connection tab Make sure that Internet Explorer is set to Never dial a connection For Netscape Navigator click Edit Preferences Advanced and Proxy Make sure that Netscape Navigator is set to Direct connection to the Internet 47 What is DMZ Hosting Demilitarized Zone DMZ allows one IP address computer to be exposed to the Internet Some applications require multiple TCP IP ports to be open It is recommended that you set your computer with a static IP if you want to use DMZ Hosting To get the LAN IP address see Appendix E Finding the MAC Address and IP Address for Your Ethernet Adapter If DMZ Hosting is us
68. r If you need to clone the MAC address of your Ethernet adapter onto the Router see the System section of Chapter 6 The Router s Web based Utility for details Make sure you are using the right Internet connection settings Contact your ISP to see if your Internet connection type is DHCP Static IP Address or PPPoE commonly used by DSL consumers Please refer to the Setup section of Chapter 6 The Router s Web based Utility for details on Internet connection settings Make sure you have the right cable Check to see if the Internet column has a solidly lit Link Act LED Make sure the cable connecting from your cable or DSL modem is connected to the Router s Internet port Verify that the Status page of the Router s web based utility shows a valid IP address from your ISP Turn off the computer Router and cable DSL modem Wait 30 seconds and then turn on the Router cable DSL modem and computer Check the Status tab of the Router s web based utility to see if you get an IP address 6 Iam not able to access the Setup page of the Router s web based utility e Refer to Problem 2 want to test my Internet connection to verify that your computer is properly connected to the Router 1 2 3 Refer to Appendix D Finding the MAC Address and IP address for Your Ethernet Adapter to verify that your computer has an IP Address Subnet Mask Gateway and DNS Set a static IP address on your system refe
69. r that starts the port range under Start and the number that ends the range under End Protocol Enter the protocol used for this application either TCP or UDP or Both IP Address For each application enter the IP Address of the PC running the specific application Enable Click the Enable checkbox to enable port forwarding for the relevant application Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes A Division wf Onco Systems te Fommy Veron v 30 Bc Wireless G Broadband Router Applications amp Gaming Application Start End Protocol IPAddress Boh 192 1681 0 Boh 1921681 0 Boh v 1921681 0 Both v 192 1681 0 Boh v 1921681 0 Boh v 1921681 0 Both v 1921581 0 Both 192 1681 0 Both 1921681 0 e fo fo j o o o fo F828 Ss S S l l o o o o o Boe 6 6 aa oof Both v 192 1681 0 _SeveSetings fj Cancel Changes Figure 6 28 Applications and Gaming Tab Port Range Forward 30 The Applications and Gaming Tab DMZ The DMZ feature allows one network user to be exposed to the Internet for use of a special purpose service such as Internet gaming or videoconferencing DMZ hosting forwards all the ports at the same time to one PC The Port Range Forward feature is more secure because it only opens the ports you want to have opened while DMZ hosting opens all the ports of one computer exposing t
70. r to Problem 1 need to set a static IP address Refer to Problem 10 need to remove the proxy settings or the dial up pop up window for PPPoE users 40 7 I need to set up a server behind my Router and make it available to the public To use a server like a web ftp or mail server you need to know the respective port numbers they are using For example port 80 HTTP is used for web port 21 FTP is used for FTP and port 25 SMTP outgoing and port 110 POP3 incoming are used for the mail server You can get more information by viewing the documentation provided with the server you installed e Follow these steps to set up port forwarding through the Router s web based utility We will be setting up web ftp and mail servers 1 Access the Router s web based utility by going to http 192 168 1 1 or the IP address of the Router Go to the Applications amp Gaming gt Port Forwarding tab 2 Enter any name you want to use for the Customized Application 3 Enter the External Port range of the service you are using For example if you have a web server you would enter the range 80 to 80 4 Check the protocol you will be using TCP and or UDP 5 Enter the IP address of the PC or network device that you want the port server to go to For example if the web server s Ethernet adapter IP address is 192 168 1 100 you would enter 100 in the field provided Check Appendix D Finding the MAC Address and IP Addres
71. res section in the Table of Contents Table of Contents Chapter 1 Introduction Welcome What s in this Guide Chapter 2 Planning your Wireless Network Network Topology Roaming Network Layout Chapter 3 Getting to Know the Wireless G Broadband Router The Back Panel The Front Panel Chapter 4 Connecting the Wireless G Broadband Router Hardware Installation Chapter 5 Configuring the PCs Overview Configuring Windows 98 and Millennium PCs Configuring Windows 2000 PCs Configuring Windows XP PCs Chapter 6 Configuring the Wireless G Broadband Router Overview The Setup Tab Basic Setup The Setup Tab DDNS The Setup Tab MAC Address Clone The Setup Tab Advanced Routing The Wireless Tab Basic Wireless Settings The Wireless Tab Wireless MAC Filter The Wireless Tab Advanced Wireless Settings The Security Tab Firewall The Security Tab VPN Passthrough The Security Tab Wireless Security The Access Restrictions Tab The Applications and Gaming Tab Port Range Forward The Applications and Gaming Tab DMZ OMAOnNOD OoaHPB PNY The Administration Tab Management The Administration Tab Log The Administration Tab Diagnostics The Administration Tab Factory Defaults The Administration Tab Firmware Upgrade The Status Tab Router The Status Tab Local Network The Status Tab Wireless Appendix A Troubleshooting Common Problems and Solutions Frequently Asked Questions Appendix B Wireless Security A Brief
72. rn Authorization Number BE SURE TO HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALLING When returning a product mark the Return Authorization Number clearly on the outside of the package and include a copy of your original proof of purchase RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE You are responsible for shipping defective products to Linksys Linksys pays for UPS Ground shipping from Linksys back to You only Customers located outside of the United States of America and Canada are responsible for all shipping and handling charges ALL IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO THE DURATION OF THE WARRANTY PERIOD ALL OTHER EXPRESS OR IMPLIED CONDITIONS REPRESENTATIONS AND WARRANTIES INCLUDING ANY IMPLIED WARRANTY OF NON INFRINGEMENT ARE DISCLAIMED Some jurisdictions do not allow limitations on how long an implied warranty lasts so the above limitation may not apply to You This warranty gives You specific legal rights and You may also have other rights which vary by jurisdiction TO THE EXTENT NOT PROHIBITED BY LAW IN NO EVENT WILL LINKSYS BE LIABLE FOR ANY LOST DATA REVENUE OR PROFIT OR FOR SPECIAL INDIRECT CONSEQUENTIAL INCIDENTAL OR PUNITIVE DAMAGES HOWEVER CAUSED REGARDLESS OF THE THEORY OF LIABILITY ARISING OUT OF OR RELATED TO THE USE OF OR INABILITY TO USE THE PRODUCT EVEN IF LINKSYS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES IN NO EVENT WILL
73. ryption Wireless and LAN settings etc transmission The default setting Manual allows you to enter the largest packet size that will be transmitted and replace them with the factory defaults Do not The recommended size entered in the Sizefield is 1492 You should leave this value in the 1200 to 1500 range reset the Access Point if you want to retain these To have the Router select the best MTU for your Internet connection select Auto settings Router IP LocaliP Address 192 168 1 1 Network Setup Subnet Mask 255 255 255 0 v The Network Setup section changes the settings on the network connected to the Router s Ethernet ports Figure 6 8 Router IP Wireless Setup is performed through the Wireless tab Router IP This presents both the Router s IP Address and Subnet Mask as seen by your network Network Address Server Settings DHCP The settings allow you to configure the Router s Dynamic Host Configuration Protocol DHCP server function The Router can be used as a DHCP server for your network A DHCP server automatically assigns an IP address to O EES DACE DHCP Server Enable Disable each computer on your network If you choose to enable the Router s DHCP server option you must configure all Starting IP Address 492 168 1 100 of your network PCs to connect to a DHCP server the Router and make sure there is no other DHCP server on aie ot TED your network Cient Lease Time O minutes 0 means one day Static ONS 1
74. s This is the Router s IP address as seen from the Internet Your ISP will provide you with the IP Address you need to specify here Subnet Mask This is the Router s Subnet Mask as seen by users on the Internet including your ISP Your ISP will provide you with the Subnet Mask Gateway Your ISP will provide you with the Gateway Address User Name and Password Enter the User Name and Password provided by your ISP Connect on Demand Max Idle Time You can configure the Router to cut the Internet connection after it has been inactive for a specified period of time Max Idle Time If your Internet connection has been terminated due to inactivity Connect on Demand enables the Router to automatically re establish your connection as soon as you attempt to access the Internet again If you wish to activate Connect on Demand click the radio button In the Max Idle Time field enter the number of minutes you want to have elapsed before your Internet connection terminates Keep Alive Option Redial Period If you select this option the Router will periodically check your Internet connection If you are disconnected then the Router will automatically re establish your connection To use this option click the radio button next to Keep Alive To use this option click the radio button next to Keep Alive In the Redial Period field you specify how often you want the Router to check the Internet connection The default Redial Period is 30 seconds
75. s for Your Ethernet Adapter for details on getting an IP address 6 Check the Enable option for the port services you want to use Consider the example below Customized External Port TCP UDP IP Address Enable Application Web server 80 to 80 X X 192 168 1 100 X FTP server 21 to 21 X 192 168 1 101 X SMTP outgoing 25 to 25 X X 192 168 1 102 X POP3 incoming 110 to 110 X X 192 168 1 102 X When you have completed the configuration click the Save Settings button 8 I need to set up online game hosting or use other Internet applications If you want to play online games or use Internet applications most will work without doing any port forwarding or DMZ hosting There may be cases when you want to host an online game or Internet application This would require you to set up the Router to deliver incoming packets or data to a specific computer This also applies to the Internet applications you are using The best way to get the information on what port services to use is to go to the website of the online game or application you want to use Follow these steps to set up online game hosting or use a certain Internet application 1 Access the Router s web interface by going to http 192 168 1 1 or the IP address of the Router Go to the Applications amp Gaming gt Port Forwarding tab 2 Enter any name you want to use for the Customized Application 3 Enter the External Port range of the service you are using For example if you want t
76. sign a static IP address to a PC by performing the following steps e For Windows 98 and Me 1 2 6 7 Click Start Settings and Control Panel Double click Network In The following network components are installed box select the TCP IP gt associated with your Ethernet adapter If you only have one Ethernet adapter installed you will only see one TCP IP line with no association to an Ethernet adapter Highlight it and click the Properties button Inthe TCP IP properties window select the IP address tab and select Specify an IP address Enter a unique IP address that is not used by any other computer on the network connected to the Router Make sure that each IP address is unique for each PC or network device Click the Gateway tab and in the New Gateway prompt enter 192 168 1 1 which is the default IP address of the Router Click the Add button to accept the entry Click the DNs tab and make sure the DNS Enabled option is selected Enter the Host and Domain names e g John for Host and home for Domain Enter the DNS entry provided by your ISP If your ISP has not provided the DNS IP address contact your ISP to get that information or go to its website for the information Click the axbutton in the TCP IP properties window and click Close or the OK button for the Network window Restart the computer when asked e For Windows 2000 1 2 3 Click Start Settings and Control Panel Double click Ne
77. sing the Routers Web Based Utility aixi General p Connection Status Connected Duration 6 days 04 4938 Speed 100 0 Mbps Activity Sent Received a Packets 415 768 546 214 Alas General Connect using HD Linksys LNE100TX v5 Fast Ethemet Adapter eon Components checked are uted by this connection mv Cent for Microsoft Networks M B Fie ond Peter Shang for Microsoft Networks VF Inkemet Protocol TCPAP Oma __ Description General You can get IP setings assgned automaticaly your network supports thes Othervase you need to ask your nebwod administsator foe the appropriate IP settings e an iP addess C Uge the following IP address ae Ottan DNS server address automatically C Une the following ONS server addresses Figure 5 5 IP Address 11 Configuring Windows XP PCs The following instructions assume you are running Windows XP with the default interface If you are using the Classic interface where the icons and menus look like previous Windows versions please follow the instructions for Windows 2000 1 Click the Start button and then the Gontrol Panel icon Click the Network and Internet Gonnections icon Then click the Network Gonnections icon 2 Select the Local Area Connection icon for the applicable Ethernet adapter usually it is the first Local Area Connection listed Double click the Local Area Connection Click the Properties butt
78. sociated devices that communicate with each other wirelessly 69 Standards Channels Ports Buttons Cabling Type Data Rate Transmit Power LEDs Dimensions LxWxH Unit Weight Power Certifications Operating Temp Storage Temp Operating Humidity Storage Humidity IEEE 802 3 802 3u 802 11g and 802 11b 11 Channels US Canada 13 Channels Europe 14 Channels Japan One 10 100 RJ 45 Internet Port Four 10 100 RJ 45 Switched LAN Ports One Power Port One Reset Button UTP CAT 5 or better Up to 54Mbps 15dBm Power DMZ WLAN LAN 1 4 Internet 7 31 x 1 89 x 7 87 186 mm x 48 mm x 200 mm 17 oz 0 482 kg External 12V DC 1A FCC IC 03 CE WiFi WPA 0 C to 40 C 32 F to 104 F 20 C to 70 C 4 F to 158 F 10 to 85 Non Condensing 5 to 90 Non Condensing 70 Wrreless G Broadband Router Appendix G Specifications 71 Appendix H Warranty Information LIMITED WARRANTY Linksys warrants to the original end user purchaser You that for a period of three years the Warranty Period Your Linksys product will be free of defects in materials and workmanship under normal use Your exclusive remedy and Linksys s entire liability under this warranty will be for Linksys at its option to repair or replace the product or refund Your purchase price less any rebates If the product proves defective during the Warranty Period call Linksys Technical Support in order to obtain a Retu
79. ss assigned by a DHCP server Encryption Encoding data to prevent it from being read by unauthorized people Ethemet An IEEE standard network protocol that specifies how data is placed on and retrieved from a common transmission medium Finger A program that tells you the name associated with an e mail address Firewall Security measures that protect the resources of a local network from intruders Firmware 1 In network devices the programming that runs the device 2 Programming loaded into read only memory ROM or programmable read only memory PROM that cannot be altered by end users Fragmentation Breaking a packet into smaller units when transmitting over a network medium that cannot support the original size of the packet FTP File Transfer Protocol A standard protocol for sending files between computers over a TCP IP network and the Internet Full Duplex The ability of a networking device to receive and transmit data simultaneously Gateway A system that interconnects networks Half Duplex Data transmission that can occur in two directions over a single line but only one direction at a time Hardware The physical aspect of computers telecommunications and other information technology devices HTP HyperText Transport Protocol The communications protocol used to connect to servers on the World Wide Web IEEE The Institute of Electrical and Electronics Engineers An independent institute that devel
80. t and multicast messages The default value is L 24 ion Threshold This value specifies the maximum size for a packet before data is fragmented into multiple packets If you experience a high packet error rate you may slightly increase the Fragmentation Threshold Setting the Fragmentation Threshold too low may result in poor network performance Only minor reduction of the default value is recommended In most cases it should remain at its default value of 2346 RTS Threshold Should you encounter inconsistent data flow only minor reduction of the default value 2346 is recommended If a network packet is smaller than the preset RTS threshold size the RTS CTS mechanism will not be enabled The Router sends Request to Send RTS frames to a particular receiving station and negotiates the sending of a data frame After receiving an RTS the wireless station responds with a Clear to Send CTS frame to acknowledge the right to begin transmission The RTS Threshold value should remain at its default value of 2346 Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes 25 The Security Tab Firewall Block WAN Requests Enable the Block WAN Request feature by checking the box beside Block Anonymous Intemet Requests and you can prevent your network from being pinged or detected by other Internet users The Block WAN Request feature also reinforces your ne
81. t adapter you are using and select the Properties option In the This connection uses the following items box highlight Internet Protocol TCP IP Click the Properties button Enter a unique IP address that is not used by any other computer on the network connected to the Router Enter the Subnet Mask 255 255 255 0 Enter the Default Gateway 192 168 1 1 Router s default IP address Toward the bottom of the window select Use the following DNS server addresses and enter the Preferred DNS server and Alternative DNS server provided by your ISP Contact your ISP or go on its website to find the information Click the ox button in the Internet Protocol TCP IP Properties window Click the ox button in the Local Area Connection Properties window to test my Internet connection A Check your TCP IP settings For Windows 98 Me 2000 and XP e Refer to Chapter 4 Configure the PCs for details Make sure Obtain IP address automatically is selected in the settings B Open a command prompt For Windows 98 and Me e Click Startand Run In the Open field type in command Press the Enter key or click the ok button For Windows 2000 and XP e Click Stawt and Run In the Open field type cmd Press the Enter key or click the axbutton In the command prompt type ping 192 168 1 1 and press the Enter key e If you get a reply the computer is communicating with the Router e If you do NOT get a reply please check the cable and ma
82. t are designed to defeat WEP The best known of these is AirSnort In about a day AirSnort can analyze enough of the wireless transmissions to crack the WEP key Just like a dictionary building attack the best prevention for these types of programs is by not using static settings periodically changing WEP keys SSID etc There are several ways that WEP can be maximized a Use the highest level of encryption possible b Use multiple WEP keys c Change your WEP key regularly Current encryption technology offers 64 bit and 128 bit WEP encryption If you are using 64 bit WEP swap out your old wireless units for 128 bit encryption right away Where encryption is concerned the bigger and more complex the better A WEP key is a string of hexadecimal characters that your wireless network uses in two ways First nodes in your wireless network are identified with a common WEP key Second these WEP keys encrypt and decrypt data sent over your wireless network So a higher level of security ensures that hackers will have a harder time breaking into your network Setting one static WEP key on your wireless network leaves your network open the threats even as you think it is protecting you While it is true that using a WEP key increases wireless security you can increase it further by using multiple WEP keys Keep in mind that WEP keys are stored in the firmware of wireless cards and access points and can be used to hack into the network if a card
83. ternet e There is a setup option to keep alive the connection This may not always work so you may need to re establish connection periodically 1 To connect to the Router go to the web browser and enter http 192 168 1 1 or the IP address of the Router 2 Enter the password if asked The default password is admin 3 On the Setup screen select the option Keep Alive and set the Redial Period option at 20 seconds 4 Click the Save Settings button 5 Click the Status tab and click the Gonnect button 6 You may see the login status display as Connecting Press the F5 key to refresh the screen until you see the login status display as Connected e Click the Save Settingsy button to continue e If the connection is lost again follow steps 1 6 to re establish connection 16 1 can t access my e mail web or am getting corrupted data from the Internet The Maximum Transmission Unit MTU setting may need to be adjusted By default the MTU is set at 1500 For most DSL users it is strongly recommended to use MTU 1492 e If you are having some difficulties perform the following steps 1 To connect to the Router go to the web browser and enter http 192 168 1 1 or the IP address of the Router 2 Enter the password if asked The default password is admin 3 Look for the MTU option and select Manual In the Size field enter 1492 4 Click the Save Settings button to continue e If your difficulties continue change the Si
84. the left The WEP key must consist of the letters A through F and the numbers 0 through 9 and should be 10 characters in length for 64 bit encryption or 26 characters in length for 128 bit encryption All points in your wireless network must use the same WEP key to utilize WEP encryption Once the Passphrase is entered click the Generate key to generate a WEP key Click the Save Settings button to apply your changes and return to the Setup tab or Cancel Changes to cancel your changes C WPA Wi Fi Protected Access WPA is the newest and best available standard in Wi Fi security Two modes are available Pre Shared Key and RADIUS Pre Shared Key gives you a choice of two encryption methods TKIP Temporal Key Integrity Protocol which utilizes a stronger encryption method and incorporates Message Integrity Code MIC to provide protection against hackers and AES Advanced Encryption System which utilizes a symmetric 128 Bit block data encryption RADIUS Remote Authentication Dial In User Service utilizes a RADIUS server for authentication and the use of dynamic TKIP AES or WEP WPA is accessed through the Web Utility s Security Tab Choose one of the following Security Modes from the drop down menu Important Always remember that each point in your wireless network MUST use the same WEP Encryption method and encryption key or your wireless network will not function properly A A Division of Osco Systemes tne Fema V
85. tion The Administration Tab Firmware Upgrade Es Firmware Upgrade Firmware can be upgraded by clicking the Upgrade button after browsing for the firmware which you can foro yo tum off the power or press the reset button download from the Linksys website Do not upgrade your firmware unless you are experiencing problems with the Access Point For more information about upgrading firmware refer to Appendix C Upgrading Firmware Upg ade must HOT be interrupted Figure 6 36 Adiministration Tab Firmware Upgrade Chapter 6 Configuring the Wireless G Broadband Router 34 The Administration Tab Factory Defaults Wrreless G Broadband Router The Status Tab Router The Router screen on the Status Tab displays the Router s current status Firmnare Version This is the Router s current firmware Qurrert Time This shows the time as you set on the Setup Tab MAC Address This is the Router s MAC Address as seen by your ISP Router Name This is the specific name for the Router which you set on the Setup Tab Host Name If required by your ISP this would have been entered on the Setup Tab Domain Name If required by your ISP this would have been entered on the Setup Tab Configuration Type This shows the information required by your ISP for connection to the Internet This information was entered on the Setup Tab You can Gonnect OF Disconnect your connection here by clicking on that button Chapter 6 Conf
86. tly where available wireless bandwidth is located for the taking Even keeping your network settings such as the SSID and the channel secret won t prevent a hacker from listening for those beacon messages and stealing that information This is why most experts in wireless networking strongly recommend the use of WEP Wired Equivalent Privacy WEP encryption scrambles your wireless signals so they can only be recognized within your wireless network let s warchalk SYMBOL blackbeltjones cam warchalking Figure B 1 Warchalking 52 But even WEP has its problems WEP s encryption algorithm is referred to as simple which also means weak because the technology that scrambles the wireless signal isn t too hard to crack for a persistent hacker There are five common ways that hackers can break into your network and steal your bandwidth as well as your data The five attacks are popularly known as 1 Passive Attacks 2 Jamming Attacks 3 Active Attacks 4 Dictionary building or Table Attacks 5 Man in the Middle Attacks Passive Attacks There s no way to detect a passive attack because the hacker is not breaking into your network He is simply listening eavesdropping if you will to the information your network broadcasts There are applications easily available on the Internet that can allow a person to listen into your wireless network and the information it broadcasts Information such as MAC addresses IP addresses
87. ton Select Settings and click the Gontrol Panel icon Double click the Network icon 2 On the Configuration tab select the TaP iP line for the applicable Ethernet adapter as shown in Figure 5 1 Do not choose a TCP IP entry whose name mentions DUN PPPoE VPN or AOL If the word TCP IP appears by itself select that line Click the Properties button 3 Click the IP Address tab Select Obtain an IP address automatically See Figure 5 2 A IMPORTANT Important By default Windows 98 2000 Me and XP has TCP IP installed and set to obtain an IP address automatically If your PC does not have TCP IP installed click Start and then Help Search for the keyword TCP IP Then follow the instructions to install TCP IP ctw TE Configuration identification Access Contrai The folowing network components we installed M Chert for Microsoft Networks p DiakUp Adapter Linksys LNE 100TX Fast Ethemet AdaptedLNE 1007X v4 TCPAP gt DiakUip Adapter X gt P C Renovo _ a Primary Network Logorr Detcrpbon TCPAP is the protocol you use to connect to the Internet and wade area networks Figure 5 1 Configuration Tab TCP IP Properties 2x Bindrge Advanced Nemos DNS Configuration Gateway WINS Configuration IP Address AnIP address automatically assigned to this computer I your network does not ically assign IP addresses atk your network administrator for an and then type amp in space below inani add
88. travel on your network Static Routing sets up a fixed route to another network destination Qperating Mode Select the mode in which this Router will function If this Router is hosting your network s connection to the Internet select Gateway If another Router exists on your network select Router When Router is chosen Dynamic Routing will be enabled Dynamic Routing The Dynamic Routing feature enables the Router to automatically adjust to physical changes in the network s layout and exchange routing tables with the other router s The Router determines the network packets route based on the fewest number of hops between the source and the destination This feature is Disabled by default From the drop down menu you can also select LAN amp Wireless which performs dynamic routing over both your Ethernet and wireless networks You can also select way which performs dynamic routing with data coming from the Internet Finally selecting Both performs dynamic routing with both methods described Static Routing To set up a static route between the Router and another network select a number from the Static Routing drop down list A static route is a pre determined pathway that network information must travel to reach a specific host or network Enter the information described below to set up a new static route Clicking the Delete This Entry will delete a static route Enter Route Name Enter a name for the Route here using a maximum of
89. twork and Dial Up Connections Right click the Local Area Connection that is associated with the Ethernet adapter you are using and select the Properties option In the Components checked are used by this connection box highlight Internet Protocol TCP IP and click the Properties button Select Use the following IP address option Enter a unique IP address that is not used by any other computer on the network connected to the Router Enter the Subnet Mask 255 255 255 0 Enter the Default Gateway 192 168 1 1 Router s default IP address 38 8 9 e For Toward the bottom of the window select Use the following DNS server addresses and enter the Preferred DNS server and Alternative DNS server provided by your ISP Contact your ISP or go on its website to find the information Click the ok button in the Internet Protocol TCP IP Properties window and click the axbutton in the Local Area Connection Properties window Restart the computer if asked Windows XP The following instructions assume you are running Windows XP with the default interface If you are using the Classic interface where the icons and menus look like previous Windows versions please follow the instructions for Windows 2000 1 2 3 4 2 I want Click Start and Control Panel Click the Network and Intemet Gonnections icon and then the Network Connections icon Right click the Local Area Connection that is associated with the Etherne
90. twork security by hiding your network ports Both functions of the Block WAN Request feature make it more difficult for outside users to work their way into your network This feature is enabled by default Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes The Security Tab VPN Passthrough Use the settings on this tab to allow VPN tunnels in either IPSec or PPTP protocols to pass through the Router s firewall IPSec Pass through Internet Protocol Security IPSec is a suite of protocols used to implement secure exchange of packets at the IP layer To allow IPSec tunnels to pass through the Router click the radio button beside Enable IPSec Pass Through is enabled by default PPTP Pass through Point to Point Tunneling Protocol is the method used to enable VPN sessions to a Windows NT 4 0 or 2000 server To allow PPTP tunnels to pass through the Router click the radio button beside Enable PPTP Pass Through is enabled by default Change these settings as described here and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes relace G E eliess U E A Division of Osco Systema tne Famer Verve 120 Benen Wireless G Broadband Router Wass Security Figure 6 19 Security Tab Firewall A Dision of Caco Sytema he ET Wireless G Broadband Router Security Figure 6 20 Wireless Tab Basic Wr
91. uency of 2 4GHz What IEEE 802 11b features are supported The product supports the following IEEE 802 11b functions e CSMA CA plus Acknowledge protocol 48 Multi Channel Roaming Automatic Rate Selection RTS CTS feature Fragmentation Power Management What is ad hoc mode When a wireless network is set to ad hoc mode the wireless equipped computers are configured to communicate directly with each other The ad hoc wireless network will not communicate with any wired network What is infrastructure mode When a wireless network is set to infrastructure mode the wireless network is configured to communicate with a wired network through a wireless access point What is roaming Roaming is the ability of a portable computer user to communicate continuously while moving freely throughout an area greater than that covered by a single access point Before using the roaming function the workstation must make sure that it is the same channel number with the access point of dedicated coverage area To achieve true seamless connectivity the wireless LAN must incorporate a number of different functions Each node and access point for example must always acknowledge receipt of each message Each node must maintain contact with the wireless network even when not actually transmitting data Achieving these functions simultaneously requires a dynamic RF networking technology that links access points and nodes In such a system the user s end
92. ur wireless PC in the same room and move it away in small increments to determine the maximum range in your environment You may also try using different channels as this may eliminate interference affecting only one channel I have excellent signal strength but cannot see my network WEP is probably enabled on the Router but not on your wireless adapter or vice versa Verify that the same WEP keys and levels 64 or 128 are being used on all nodes of your wireless network How many channels frequencies are available with the Router There are eleven available channels ranging from 1 to 11 in North America If your questions are not addressed here refer to the Linksys website www linksys com 51 Appendix B Wireless Security ABrief Overview Whenever data in the form of files emails or messages is transmitted over your wireless network it is open to attacks Wireless networking is inherently risky because it broadcasts information on radio waves Just like signals from your cellular or cordless phone can be intercepted signals from your wireless network can also be compromised What are the risks inherent in wireless networking Read on What Are The Risks Computer network hacking is nothing new With the advent of wireless networking hackers use methods both old and new to do everything from stealing your bandwidth to stealing your data There are many ways this is done some simple some complex As a wireless user
93. ure 4 3 Connecting the Power Now that the hardware installation is complete proceed to Chapter 5 Configuring the PCs for directions on how to configure your PC Wrreless G Broadband Router Chapter 4 Connecting the Wireless G Broadband Router Hardware Installation 10 Chapter 5 Configuring the PCs Qverview The instructions in this chapter will help you configure each of your computers to be able to communicate with the Router To do this you need to configure your PC s network settings to obtain an IP or TCP IP address automatically so your PC can function as a DHCP client Computers use IP addresses to communicate with the Router and each other across a network such as the Internet First find out which Windows operating system your computer is running You can find out by clicking the Start button Read the side panel of the Start menu to find out which operating system your PC is running You may need to do this for each computer you are connecting to the Router The next few pages tell you step by step how to configure your network settings based on the type of Windows operating system you are using Make sure that an Ethernet or wireless adapter also known as a network adapter has been successfully installed in each PC you will configure Once you ve configured your computers continue to Chapter 6 Using the Router s Web Based Utility Configuring Windows 98 and Millennium PCs 1 Click the Start but
94. urnament server running you need to create a static IP for each of the LAN computers and forward ports 7777 7778 7779 7780 7781 and 27900 to the IP address of the server You can also use a port forwarding range of 7777 27900 If you want to use the UT Server Admin forward another port Port 8080 usually works well but is used for remote admin You may have to disable this Then in the UWeb WebServer section of the server ini file set the ListenPort to 8080 to match the mapped port above and ServerName to the IP assigned to the Router from your ISP Can multiple gamers on the LAN get on one game server and play simultaneously with just one public IP address It depends on which network game or what kind of game server you are using For example Unreal Tournament supports multi login with one public IP How do I get Half Life Team Fortress to work with the Router The default client port for Half Life is 27005 The computers on your LAN need to have clientport 2700x added to the HL shortcut command line the x would be 6 7 8 and on up This lets multiple computers connect to the same server One problem Version 1 0 1 6 won t let multiple computers with the same CD key connect at 46 the same time even if on the same LAN not a problem with 1 0 1 3 As far as hosting games the HL server does not need to be in the DMZ Just forward port 27015 to the local IP address of the server computer How can I block corrupted FT
95. width efficiency for reliability integrity and security In other words more bandwidth is consumed than in the case of narrowband transmission but the trade off produces a signal that is in effect louder and thus easier to detect provided that the receiver knows the parameters of the spread spectrum signal being broadcast If a receiver is not tuned to the right frequency a spread spectrum signal looks like background noise There are two main alternatives Direct Sequence Spread Spectrum DSSS and Frequency Hopping Spread Spectrum FHSS What is DSSS What is FHSS And what are their differences Frequency Hopping Spread Spectrum FHSS uses a narrowband carrier that changes frequency in a pattern that is known to both transmitter and receiver Properly synchronized the net effect is to maintain a single logical channel To an unintended receiver FHSS appears to be short duration impulse noise Direct Sequence Spread Spectrum DSSS generates a redundant bit pattern for each bit to be transmitted This bit pattern is called a chip or chipping code The longer the chip the greater the probability that the original data can be recovered Even if one or more bits in the chip are damaged during transmission statistical techniques embedded in the radio can recover the original data without the need for retransmission To an unintended receiver DSSS appears as low power wideband noise and is rejected ignored by most narrowband receivers Wil
96. y associate with this rogue access point not knowing the difference and may begin sending data through it and to this hacker The trade off for the convenience and flexibility wireless networking provides is the possibility of being hacked into through one of the methods described here With wireless networks even with WEP encryption open to the persistent hacker how can you protect your data The following section will tell you how to do just that Maximizing Wireless Security Security experts will all tell you the same thing Nothing is guaranteed No technology is secure by itself An unfortunate axiom is that building the better mousetrap can often create a better mouse This is why in the 54 examples below your implementation and administration of network security measures is the key to maximizing wireless security No preventative measure will guarantee network security but it will make it more difficult for someone to hack into your network Often hackers are looking for an easy target Making your network less attractive to hackers by making it harder for them to get in will make them look elsewhere How do you do this Before discussing WEP and WPA let s look at a few security measures often overlooked A Common Sense Solutions 1 Network Content Now that you know the risks assumed when networking wirelessly you should view wireless networks as you would the Internet Don t host any systems or provide access to data
97. ze to different values Try this list of values one value at a time in this order until your problem is solved 1462 1400 1362 1300 44 17 The Power LED keeps flashing The Power LED flashes when the device is first powered up Meantime the system will boot up itself and check for proper operation After finishing the checking procedure the LED stays solid to show that the system is working fine If the LED keeps flashing after this time the device is not working properly Try to flash the firmware by assigning a static IP address to the computer and then upgrade the firmware Try using the following settings IP Address 192 168 1 50 and Subnet Mask 255 255 255 0 18 When I enter a URL or IP address I get a time out error or am prompted to retry e Check if other PCs work If they do ensure that your workstation s IP settings are correct IP Address Subnet Mask Default Gateway and DNS Restart the computer that is having a problem e Ifthe PCs are configured correctly but still not working check the Router Ensure that it is connected and powered on Connect to it and check its settings If you cannot connect to it check the LAN and power connections e If the Router is configured correctly check your Internet connection DSL cable modem etc to see if it is working correctly You can remove the Router to verify a direct connection e Manually configure the TCP IP settings with a DNS address provided by your ISP e Ma

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