Linksys WRH54G manual Appendix B Wireless Security, Security Precautions

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Wireless-G Home Router

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 6: Configuring the Wireless-G Home 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 Wireless- G Copyright and Trademarks Word definitionTable of Contents Appendix C Upgrading Firmware Appendix D Windows Help Appendix a TroubleshootingAppendix B Wireless Security List of Figures Router’s Back Panel23 Wireless Tab Wireless Security Radius Figure E-1 IP Configuration Screen Introduction WelcomeWhat’s in this User Guide? Wireless-G Home Router Planning Your Wireless Network Ad-Hoc versus Infrastructure ModeSsid service set identifier your wireless network’s name Network TopologyPlanning Your Wireless Network Network Layout Getting to Know the Wireless-G Home Router Back PanelFront Panel Router’s LEDs are located on the front panelConnecting the Wireless-G Home Router OverviewConnecting Your Network Devices Hardware Installation for Connection to Another Router Connecting Another RouterConnecting Your Network Devices Configuring the Wireless-G Home Router Welcome ScreenSetup Tab Basic Setup Internet SetupPPPoE Connection Type Optional Settings Network Setup Time Setting Setup Tab Ddns DdnsSetup Tab MAC Address Clone TZO.comSetup Tab Advanced Routing 15 Setup Tab Advanced Routing RouterSetup Tab WAN Port Configure Wireless Tab Basic Wireless SettingsWireless Tab Wireless Security 19 Wireless Tab Wireless Security WPA Personal22 Wireless Tab Wireless Security WPA2 Enterprise 23 Wireless Tab Wireless Security Radius Wireless Tab MAC Filtering 25 Wireless Tab Wireless MAC FilterWireless Tab Advanced Wireless Settings Severely decrease performanceWireless-G Home Router Security Tab Firewall Additional FiltersSecurity Tab VPN Passthrough Security Tab ARPAccess Restrictions Tab Internet Access 31 Access Restrictions Tab Internet Access34 Port Services Applications and Gaming Tab Single Port Forward 35 Single Port ForwardWireless-G Home Router Applications and Gaming Tab Port Range Forward 36 Applications and Gaming Tab Port Range ForwardApplications & Gaming Tab Port Triggering Triggered RangeApplications and Gaming Tab UPnP 38 Applications and Gaming Tab UPnPApplications and Gaming Tab DMZ 39 Applications and Gaming Tab DMZAdministration Tab Management Administration Tab LogAdministration Tab Diagnostics 43 Administration Tab Diagnostics45 The Traceroute Test Administration Tab Config Management Administration Tab Factory DefaultsAdministration Tab Firmware Upgrade Administration Tab Reboot Status Tab RouterStatus Tab Local Network 52 Status Tab Local NetworkStatus Tab Traffic Statistics 54 Traffic StatisticsStatus Tab Wireless 55 Status Tab WirelessNeed to set a static IP address on a PC Appendix a TroubleshootingCommon Problems and Solutions Wireless-G Home Router Open a command prompt. For Windows 98SE and Me Application Start and End Protocol IP Address Enabled Can’t get the Internet game, server, or application to work Wireless-G Home Router To start over, I need to set the Router to factory default Need to upgrade the firmwareFirmware upgrade failed, and/or the Power LED is flashing My DSL service’s PPPoE is always disconnectingPower LED keeps flashing Frequently Asked Questions Where is my SecureEasySetup button?Where is the Router installed on the network? Is IPSec Pass-Through supported by the Router?What is Network Address Translation and what is it used for? Does the Router support ICQ send file?How can I block corrupted FTP downloads? What is DMZ Hosting? What are the advanced features of the Router?What is the Ieee 802.11g standard? Is the Router cross-platform compatible?What is the Ieee 802.11b standard? What Ieee 802.11g features are supported?What Ieee 802.11b 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 a MAC Address?How do I reset the Router? How do I resolve issues with signal loss?Security Threats Facing Wireless Networks Appendix B Wireless SecuritySecurity Precautions Appendix B Wireless Security Wireless-G Home Router Figure C-1 Upgrade Firmware Appendix C Upgrading FirmwareAppendix D Windows Help TCP/IPWindows 98SE or Me Instructions Windows 2000 or XP InstructionsFor the Router’s Web-based Utility Figure E-4 MAC Address Filter ListAppendix F Glossary Wireless-G Home Router Wireless-G Home Router Wireless-G Home Router Wireless-G Home Router Appendix G Specifications WRH54GFCC Appendix H Warranty Information Limited WarrantyAppendix I Regulatory Information Wireless-G Home Router Wireless-G Home Router Wireless-G Home Router Wireless-G Home Router Wireless-G Easy Router Appendix J Contact Information