Linksys WRT150N manual Appendix B Wireless Security, Security Precautions

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Wireless-N 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 5: Configuring the Wireless-N 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

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Security Precautions

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Contents GHz Wireless- N How to Use This User Guide Copyright and TrademarksWord definition Table of Contents Appendix B Wireless Security Appendix a TroubleshootingCommon Problems and Solutions Frequently Asked Questions Appendix C Upgrading Firmware Appendix D Windows HelpRouter’s Front Panel Router’s Back Panel26 Access Restrictions Tab Internet Access Policy Welcome IntroductionWhat’s in this User Guide? Wireless-N Home Router Ad-Hoc versus Infrastructure Mode Planning Your Wireless NetworkSsid service set identifier your wireless network’s name Network TopologyPlanning Your Wireless Network Network Layout Back Panel Getting to Know the Wireless-N Home RouterTop Panel Front PanelHardware Installation Connecting the Wireless-N Home RouterSetup Configuring the Wireless-N Home RouterWireless OverviewAdministration Access RestrictionsSecurity Applications & GamingSetup Tab Basic Setup How to Access the Web-based UtilityInternet Setup StatusPPPoE Static IPTelstra Cable PptpPacket a unit of data sent over a network Optional SettingsNetwork Setup Dhcp Server SettingRouter IP Dhcp Reservation Time SettingSetup Tab Ddns Ddns ServiceDynDNS.org TZO.com 10 Setup Tab Ddns TZO.comMAC Address Clone Setup Tab MAC Address CloneAdvanced Routing Setup Tab Advanced RoutingDynamic Routing Static Routing13 Routing Table Basic Wireless Settings Wireless Tab Basic Wireless SettingsWireless Security Wireless Tab Wireless SecurityPSK-Personal PSK2-PersonalPSK2-Enterprise PSK-EnterpriseRadius Wireless MAC Filter Wireless Tab Wireless MAC FilterAccess Restrictions MAC Address Filter ListAdvanced Wireless Wireless Tab Advanced Wireless SettingsWireless-N Home Router Internet Filter Security Tab FirewallWeb Filter FirewallVPN Passthrough Security Tab VPN PassthroughAccess Restrictions Tab Internet Access Policy Internet Access PolicyTo create a policy 28 List of PCs Single Port Forwarding Applications & Gaming Tab Single Port ForwardingPort Range Forwarding Applications & Gaming Tab Port Range ForwardingPort Range Triggering Applications & Gaming Tab Port Range TriggeringDMZ Applications & Gaming Tab DMZWireless QoS Quality of ServiceInternet Access Priority Applications and Gaming Tab QoS35 QoS Applications Add a New Application 39 QoS Voice Device SummaryRouter Access Administration Tab ManagementWeb Access Remote AccessUPnP Backup and RestoreLog Administration Tab Log43 Administration Tab Diagnostics Administration Tab DiagnosticsFactory Defaults Administration Tab Factory DefaultsUpgrade Firmware Administration Tab Firmware UpgradeStatus Tab Router Router InformationInternet Connection Local Network Status Tab Local Network51 Status Tab Wireless Status Tab WirelessAppendix a Troubleshooting Common Problems and SolutionsNeed to set a static IP address on a PC Wireless-N Home Router Open a command prompt. For Windows 98SE and Me Application Name Protocol To IP Address EnabledCan’t get the Internet game, server, or application to work Application Name Start and End PortWireless-N Home Router Need to upgrade the firmware To start over, I need to set the Router to factory defaultsFirmware upgrade failed, and/or the Power LED is flashing My DSL service’s PPPoE is always disconnectingPower LED keeps flashing Where is the Router installed on the network? Frequently Asked QuestionsIs IPSec Pass-Through supported by the Router? Does the Router support IPX or AppleTalk?How can I block corrupted FTP downloads? What are the advanced features of the Router? What is DMZ Hosting?Will the Router function in a Macintosh environment? Is the Router cross-platform compatible?What is the Ieee 802.11b standard? What is the Ieee 802.11g standard?What Ieee 802.11g features are supported? What Ieee 802.11b features are supported?What is roaming? What is infrastructure mode?What is ISM band? What is Spread Spectrum?What is a MAC Address? What is DSSS? What is FHSS? And what are their differences?How do I reset the Router? How do I resolve issues with signal loss?Appendix B Wireless Security Security PrecautionsSecurity Threats Facing Wireless Networks Appendix B Wireless Security Wireless-N Home Router Appendix C Upgrading Firmware Figure C-1 Firmware UpgradeAppendix D Windows Help Shared ResourcesNetwork Neighborhood/My Network Places Windows 98SE or Me Instructions Figure E-1 IP Configuration ScreenFor the Router’s Web-based Utility Windows 2000 or XP InstructionsAppendix F Glossary Wireless-N Home Router Wireless-N Home Router Wireless-N Home Router Wireless-N Home Router Appendix G Specifications ModelLEDs Storage Temp Operating TempOperating Humidity Storage HumidityLimited Warranty Appendix H Warranty InformationFCC Statement Appendix I Regulatory InformationWireless-N Home Router Wireless-N Home Router Wireless-N Home Router Wireless-N Home Router Wireless-G Home Router Appendix J Contact Information Need to contact Linksys?Information section in this Guide