Linksys WPC54G manual Appendix B Wireless Security, Security Precautions

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Wireless-G Notebook Adapter

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.

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.

SSID. There are several things to keep in mind about the SSID:

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 Word definition Copyright and TrademarksTable of Contents Front Panel List of Figures21 EAP-MD5 Authentication Welcome IntroductionAdapter a device that adds network functionality to your PC What’s in this Guide? Wireless-G Notebook Adapter Network Topology Planning your Wireless NetworkRoaming Topology the physical layout of a networkNetwork Layout Planning your Wireless NetworkLED Indicators Getting to Know the Wireless-G Notebook AdapterPower LinkSoftware instructions for the computer Software Installation and ConfigurationSetup Wizard’s Wireless Mode Screen Installation ProcedureBit a binary digit WEPWPA-PSK Setup Wizard’s Check Settings ScreenSetup Wizard’s Congratulations Screen Connecting the Adapter Hardware InstallationAccessing the Wireless Network Monitor Using the Wireless Network MonitorLink Information Internet traffic from your local area network Encryption encoding data transmitted in a networkByte a unit of data that is usually eight bits long Wireless Network StatisticsSite Information Site SurveyProfile Information ProfilesOn the Profiles screen, click New to create a new profile Creating a New Profile11 Ad-Hoc Mode Settings 12 Network Settings 13 Wireless Security for New Profile 15 WPA-PSK Settings WPA Radius 17 WPA Radius SettingsEAP-TTLS EAP-TLSEAP-MD5 EAP-PEAPRadius 24 Radius Settings27 EAP-MD5 Authentication 30 Confirm New Settings Common Problems and Solutions Appendix a TroubleshootingWireless-G Notebook Adapter does not work properly What is the 802.11b standard? Frequently Asked Questions What is the 802.11g standard? What 802.11b features are supported?What is infrastructure mode? What is ad-hoc mode?What is roaming? What is ISM band?What is WEP? What is DSSS? What is FHSS? And what are their differences?Security Precautions Appendix B Wireless SecuritySecurity Threats Facing Wireless Networks Appendix B Wireless Security Wireless-G Notebook Adapter TCP/IP Appendix C Windows HelpAppendix D Glossary Wireless-G Notebook Adapter Wireless-G Notebook Adapter Wireless-G Notebook Adapter Appendix E Specifications Limited Warranty Appendix F Warranty InformationFCC Statement Appendix G Regulatory InformationIndustry Canada Canada EC Declaration of Conformity Europe Safety Notices Appendix H Contact Information
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