Linksys WRT54G-TM manual Security Tab Firewall, Security Tab VPN Passthrough

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Wireless-G Broadband Router

The Security Tab - Firewall

Firewall Protection. This feature employs Stateful Packet Inspection (SPI) for a more detailed review of data packets entering your network environment.

Block WAN Requests. Enable the Block WAN Request feature by checking the box beside Block Anonymous Internet Requests and you can prevent your network from being “pinged,” or detected, by other Internet users. The Block WAN Request feature also reinforces your network 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. Select Disabled to allow anonymous Internet requests.

Filter Multicast. Multicasting allows for multiple transmissions to specific recipients at the same time. If multicasting is permitted, then the Router will allow IP multicast packets to be forwarded to the appropriate computers. Select Enabled to filter multicasting, or Disabled to disable this feature.

Filter Internet NAT Redirection. This feature uses port forwarding to block access to local servers from local networked computers. Select Enabled to filter Internet NAT redirection, or Disabled to disable this feature.

Filter IDENT (Port 113). This feature keeps port 113 from being scanned by devices outside of your local network. Select Enabled to filter port 113, or Disabled to disable this feature.

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 using IPSec, PPTP, or L2TP 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 Enable. IPSec Pass- Through is enabled by default.

PPTP Pass-through. Point-to-Point Tunneling Protocol (PPTP) allows the Point-to-Point Protocol (PPP) to be tunneled through an IP network. To allow PPTP tunnels to pass through the Router, click Enable. PPTP Pass- Through is enabled by default.

L2TP Pass-through. Layer 2 Tunneling Protocol is the method used to enable Point-to-Point sessions via the Internet on the Layer 2 level. To allow L2TP tunnels to pass through the Router, click Enable. L2TP Pass-Through is enabled by default.

Chapter 6: Configuring the Wireless-G Broadband Router

Figure 5-26: Security Tab - Firewall

Figure 5-27: Security Tab - VPN Passthrough

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The Security Tab - Firewall

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Contents 802 GHz .11g Wireless- G Copyright and Trademarks Word definitionTable of Contents Appendix B Wireless Security Appendix a TroubleshootingAppendix C Upgrading Firmware Appendix D Windows Help List of Figures Router’s Back Panel23 Wireless Tab Wireless MAC Filter Wireless-G Broadband Router Introduction WelcomeWhat’s in this User Guide? Wireless-G Broadband Router Ssid service set identifier your wireless network’s name Planning Your Wireless NetworkAd-Hoc versus Infrastructure Mode Network TopologyPlanning Your Wireless Network Network Layout Getting to Know the Wireless-G Broadband Router Back PanelFront Panel DMZConnecting the Wireless-G Broadband Router OverviewConnecting Your Network Devices Hardware Installation for Connection to Another Router Connecting Another RouterConnecting Your Network Devices Configuring the Wireless-G Broadband Router Password ScreenSetup Tab Basic Setup Internet SetupPPPoE Connection Type Optional Settings Router IP Setup Tab Ddns 12 Setup Tab DdnsSetup Tab MAC Address Clone 13 Setup Tab MAC Address CloneSetup Tab Advanced Routing 14 Setup Tab Advanced Routing GatewayWireless Tab Basic Wireless Settings Wireless Tab Wireless Security 17 Wireless Tab Wireless Security WPA Personal20 Wireless Tab Wireless Security WPA2 Enterprise 21 Wireless Tab Wireless Security Radius Wireless Tab Wireless MAC Filter 23 Wireless Tab Wireless MAC FilterWireless Tab Advanced Wireless Settings SettingWireless-G Broadband Router Security Tab Firewall Security Tab VPN PassthroughAccess Restrictions Tab Internet Access To create an Internet Access policyTo create an Inbound Traffic policy Applications and Gaming Tab Port Range Forward 33 Applications and Gaming Tab Port Range ForwardApplications & Gaming Tab Port Triggering Port TriggeringApplications and Gaming Tab DMZ Applications and Gaming Tab QoSApplication Port Priority Administration Tab Management Administration Tab LogAdministration Tab Diagnostics 39 Administration Tab DiagnosticsAdministration Tab Firmware Upgrade Administration Tab Factory DefaultsAdministration Tab Config Management Status Tab Router 45 Status Tab RouterStatus Tab Local Network 46 Status Tab Local NetworkStatus Tab Wireless 48 Status Tab WirelessCommon Problems and Solutions Appendix a TroubleshootingNeed to set a static IP address on a PC Wireless-G Broadband Router Wireless-G Broadband Router Application Start and End Protocol IP Address Enabled Can’t get the Internet game, server, or application to work Need to upgrade the firmware To start over, I need to set the Router to factory defaultFirmware upgrade failed, and/or the Power LED is flashing My DSL service’s PPPoE is always disconnecting Where is the Router installed on the network? Frequently Asked QuestionsPower LED keeps flashing 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 the Ieee 802.11g standard? What is DMZ Hosting?What are the advanced features of the Router? What is the Ieee 802.11b standard?What is ad-hoc mode? What Ieee 802.11g features are supported?What Ieee 802.11b features are supported? What is infrastructure mode?What is Spread Spectrum? What is ISM band?What is DSSS? What is FHSS? And what are their differences? How do I reset the Router? What is WEP?What is a MAC Address? How do I resolve issues with signal loss?Security Precautions Appendix B Wireless SecuritySecurity Threats Facing Wireless Networks Appendix B Wireless Security Wireless-G Broadband Router Appendix C Upgrading Firmware Appendix 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 Broadband Router Wireless-G Broadband Router Wireless-G Broadband Router Wireless-G Broadband Router Wireless-G Broadband Router Wireless-G Broadband Router Appendix G Specifications WRT54GOperating Temp Appendix H Warranty Information Limited WarrantyAppendix I Regulatory Information FCC StatementWireless-G Broadband Router Wireless-G Broadband Router Wireless-G Broadband Router Wireless-G Broadband Router Dual-Band Wireless Access Point Appendix J Contact Information
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