Linksys WRT54GL 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 6-26: Security Tab - Firewall

Figure 6-27: 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 How to Use This User GuideWord definition Table of Contents Appendix C Upgrading Firmware Appendix D Windows Help Appendix a TroubleshootingAppendix B Wireless Security Common Problems and Solutions Frequently Asked QuestionsRouter’s Back Panel List of Figures23 Setup Wizard’s Configure Wireless Settings Screen 19 Wireless Tab Wireless Security WPA2 Personal Figure E-5 MAC Address Clone Welcome IntroductionWhat’s in this User Guide? Wireless-G Broadband Router Network Topology Planning Your Wireless NetworkAd-Hoc versus Infrastructure Mode Ssid service set identifier your wireless network’s namePlanning Your Wireless Network Network Layout Back Panel Getting to Know the Wireless-G Broadband RouterCisco logo Front PanelOverview Connecting the Wireless-G Broadband RouterConnecting Your Network Devices Connecting Another Router Hardware Installation for Connection to Another RouterConnecting Your Network Devices Using the Setup Wizard Setting up the Wireless-G Broadband RouterSetup Wizard’s Disconnect the Modem from PC Screen Setup Wizard’s Connect a Network Cable to a PC Screen Setup Wizard’s Power on the Router Screen Cable or Dhcp Setup Wizard’s Check the Router’s Status ScreenStatic IP DSL PPPoEPptp L2TP Telstra 16 Setup Wizard’s Advanced Internet Settings Telstra Screen18 Setup Wizard’s Configure Wireless Settings Screen 19 Setup Wizard’s SecureEasySetup Screen Using the Router’s SecureEasySetup Feature24 Setup Wizard’s Confirm New Settings Screen 26 Setup Wizard’s Congratulations Screen 27 Setup Wizard’s Configure Wireless Settings Screen Manually Configuring the Router’s Wireless SettingsWPA-PSK WEP 128-Bit WEP 64-Bit33 Setup Wizard’s Congratulations Screen 34 Setup Wizard’s Welcome Start Wizard Screen Using SecureEasySetup to Configure Your Notebook37 Configure Wireless Settings #2 Screen 38 Your Wireless Settings Screen Configuring the Wireless-G Broadband Router Internet Setup Setup Tab Basic SetupPPPoE Connection Type Optional Settings Router IP 12 Setup Tab Ddns Setup Tab Ddns13 Setup Tab MAC Address Clone Setup Tab MAC Address Clone14 Setup Tab Advanced Routing Gateway Setup Tab Advanced RoutingWireless Tab Basic Wireless Settings 17 Wireless Tab Wireless Security WPA Personal Wireless Tab Wireless Security20 Wireless Tab Wireless Security WPA2 Enterprise 21 Wireless Tab Wireless Security Radius 23 Wireless Tab Wireless MAC Filter Wireless Tab Wireless MAC FilterSetting Wireless Tab Advanced Wireless SettingsWireless-G Broadband Router Security Tab VPN Passthrough Security Tab FirewallTo create an Internet Access policy Access Restrictions Tab Internet AccessTo create an Inbound Traffic policy 31 Port Services33 Applications and Gaming Tab Port Range Forward Applications and Gaming Tab Port Range ForwardPort Triggering Applications & Gaming Tab Port TriggeringEthernet Port Priority Applications and Gaming Tab DMZApplications and Gaming Tab QoS Device PriorityApplication Port Priority Administration Tab Log Administration Tab Management39 Administration Tab Diagnostics Administration Tab DiagnosticsAdministration Tab Firmware Upgrade Administration Tab Factory DefaultsAdministration Tab Config Management 45 Status Tab Router Status Tab Router46 Status Tab Local Network Status Tab Local Network48 Status Tab Wireless Status Tab WirelessCommon Problems and Solutions Appendix a TroubleshootingNeed to set a static IP address on a PC Wireless-G Broadband Router Open a command prompt. For Windows 98SE and Me TCP Application Start and End Protocol IP Address EnabledCan’t get the Internet game, server, or application to work Wireless-G Broadband Router My DSL service’s PPPoE is always disconnecting To start over, I need to set the Router to factory defaultNeed to upgrade the firmware Firmware upgrade failed, and/or the Power LED is flashingPower LED keeps flashing Frequently Asked Questions Does the Router support ICQ send file? What is Network Address Translation and what is it used for?How can I block corrupted FTP downloads? Is the Router cross-platform compatible? What is DMZ Hosting?What are the advanced features of the Router? What is the Ieee 802.11g standard?What is ad-hoc mode? What is the Ieee 802.11b standard?What Ieee 802.11g features are supported? What Ieee 802.11b features are supported?What is Spread Spectrum? What is ISM band?What is DSSS? What is FHSS? And what are their differences? How do I resolve issues with signal loss? What is WEP?What is a MAC Address? How do I reset the Router?Security Precautions Appendix B Wireless SecuritySecurity Threats Facing Wireless Networks Appendix B Wireless Security Wireless-G Broadband Router Appendix C Upgrading Firmware Shared Resources Appendix D Windows HelpNetwork Neighborhood/My Network Places Windows 2000 or XP Instructions Windows 98SE or Me InstructionsFigure E-4 MAC Address Filter List For the Router’s Web-based UtilityAppendix 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 Operating Temp 0ºC to 40ºC 32ºF to 104ºF Appendix G SpecificationsWireless Security StandardsOperating Humidity Storage TempStorage Humidity Limited Warranty Appendix H Warranty InformationFCC Statement Appendix I Regulatory InformationSafety Notices Appendix J Contact Information
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