Linksys WRT54GP2A-AT manual Appendix B Wireless Security, Security Precautions

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Wireless-G Broadband Router with 2 Phone Ports

Appendix B: Wireless Security

Linksys wants to make wireless networking as safe and easy for you as possible. The current generation of Linksys products provide several network security features, but they require specific action on your part for implementation. So, keep the following in mind whenever you are setting up or using your wireless network.

Security Precautions

The following is a complete list of security precautions to take (at least steps 1 through 5 should be followed):

1.Change the default SSID.

2.Disable SSID Broadcast.

3.Change the default password for the Administrator account.

4.Enable MAC Address Filtering.

5.Change the SSID periodically.

6.Use the highest encryption algorithm possible. Use WPA if it is available. Please note that this may reduce your network performance.

7.Change the WEP encryption keys periodically.

For information on implementing these security features, refer to “Chapter 5: Configuring the Router.”

Security Threats Facing Wireless Networks

Wireless networks are easy to find. Hackers know that in order to join a wireless network, wireless networking products first listen for “beacon messages”. These messages can be easily decrypted and contain much of the network’s information, such as the network’s SSID (Service Set Identifier). Here are the steps you can take:

Change the administrator’s password regularly. With every wireless networking device you use, keep in mind that network settings (SSID, WEP keys, etc.) are stored in its firmware. 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 that information. Change the administrator’s password regularly.

Appendix B: Wireless Security

Note: Some of these security features are available only through the network router or access point. Refer to the router or access point’s documentation for more information.

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Security Precautions

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Contents 802 GHz .11g Wireless- G Word definition How to Use this GuideCopyright and Trademarks Table of Contents Signing up for AT&T CallVantagesm Service Appendix a TroubleshootingAppendix B Wireless Security Appendix C Windows HelpList of Figures Back Panel18 Wireless Tab Advanced Wireless Settings Introduction WelcomeWhat’s in this Guide? Wireless-G Broadband Router with 2 Phone Ports Planning Your Wireless Network Ad-Hoc versus Infrastructure ModeSsid your wireless network’s name Network TopologyNetwork Layout Getting to Know the Router Phone2Wlan Overview Connecting the RouterConnecting the Router to Your Broadband Modem Connecting One Router to Another Wired RouterConnect the Other Router Wireless Configuring the RouterSetup Access Restrictions AdministrationSecurity Applications & GamingHow to Access the Web-based Utility Setup Tab Basic SetupInternet Setup StatusStatic IP PPPoEOptional Settings Packet a unit of data sent over a networkRouter IP Network SetupNetwork Address Server Settings Dhcp Time Setting TZO.com Setup Tab DdnsDynDNS.org Setup Tab MAC Address Clone MAC CloneWireless Tab Basic Wireless Settings 10 Wireless Tab Basic Wireless SettingsWireless Tab Wireless Security WPA RadiusRadius Wireless Tab Wireless MAC Filter 15 Wireless Tab Wireless MAC FilterWireless Tab Advanced Wireless Settings Security Tab Firewall FirewallAdditional Filters Block WAN RequestsSecurity Tab VPN VPN PassthroughTo create an Internet Access Policy Access Restrictions Tab Internet AccessInternet Access 23 List of PCs Port Range Applications & Gaming Tab Port Range ForwardPort Range Forward Applications & Gaming Tab Port Trigger Port TriggerTriggered Range Forwarded RangeApplications & Gaming Tab UPnP Forward UPnP ForwardBroadband Router with 2 Phone Ports Applications & Gaming Tab DMZ DMZAdministration Tab Management Router PasswordLocal Router Access Remote Router AccessSnmp UPnPAdministration Tab Log LogAdministration Tab Diagnostics Ping TestTraceroute Test Ping ParametersAdministration Tab Factory Defaults Factory DefaultsAdministration Tab Backup and Restore Administration Tab RebootBackup and Restore RebootConfiguration Type Status Tab RouterRouter Information InternetStatus Tab Local Network Local NetworkStatus Tab Wireless 39 Status Tab WirelessAuto Config Status Status Tab VoiceUser1 Status User2 StatusSigning up for AT&T CallVantagesm Service InstructionsAppendix a Troubleshooting Common Problems and SolutionsFor Windows 98 and Millennium Need to set a static IP address on a PCFor Windows For Windows XPFor Windows 98 and Millennium Wireless-G Broadband Router with 2 Phone Ports Am not able to access the Router’s Web-based Utility Setup Need to set up a server behind my RouterApplication Start and End Protocol IP Address Enable TCPCan’t get the Internet game, server, or application to work To start over, I need to set the Router to factory default My DSL service’s PPPoE is always disconnectingFor Microsoft Internet Explorer 5.0 or higher For Netscape 4.7 or higherNeed to use port triggering Can I make calls while I’m browsing the Internet? Frequently Asked QuestionsCan I make calls if my Internet connection is down? Does the Router support IPX or AppleTalk? Where is the Router installed on the network?Is IPSec Passthrough supported by the Router? Will the Router function in a Macintosh environment? If all else fails in the installation, what can I do?How can I block corrupted FTP downloads? What is DMZ Hosting? What is the Ieee 802.11b standard?Is the Router cross-platform compatible? How many ports can be simultaneously forwarded?What is the Ieee 802.11g standard? What Ieee 802.11b features are supported?What Ieee 802.11g features are supported? What is ad-hoc mode?What is DSSS? What is FHSS? And what are their differences? What is ISM band?What is Spread Spectrum? What is WEP? What is WPA?What is a MAC Address? How do I reset the Router?Security Threats Facing Wireless Networks Appendix B Wireless SecuritySecurity Precautions Appendix B Wireless Security Wireless-G Broadband Router with 2 Phone Ports Network Neighborhood/My Network Places Appendix C Windows HelpShared Resources Windows 98 or Me Instructions Windows 2000 or XP InstructionsFor the Router’s Web-based Utility Figure D-3 MAC Address/Physical AddressAppendix E Glossary Wireless-G Broadband Router with 2 Phone Ports Wireless-G Broadband Router with 2 Phone Ports Wireless-G Broadband Router with 2 Phone Ports Wireless-G Broadband Router with 2 Phone Ports Wireless-G Broadband Router with 2 Phone Ports Wireless-G Broadband Router with 2 Phone Ports Appendix F Specifications Button Reset Cabling TypeModel StandardsDimensions 32 x 2.48 x H x D Unit Weight 19.29 oz .55 kg Power 12 V, 1 a CertificationsRinger Equivalence Number Operating Temp 0ºC to 40ºC 32ºF to 104ºF Storage TempAppendix G Warranty Information Limited WarrantyAppendix H Regulatory Information FCC StatementSafety Notices Appendix I Contact Information LinksysAfter you log in, click Help. Then click Email AN Agent Need to contact Linksys?