Linksys BEFSX41 Block WAN Request, Multicast Pass Through, IPSec Pass Through, Pptp Pass Through

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Instant Broadband® Series

Web Filter You can either enable or disable these four filtering methods by selecting Allow or Deny.

Proxy If local users have access to WAN proxy servers, they may be able to circumvent the Router’s content filters and access Internet sites blocked by the Router. Denying Proxy will block access to any WAN proxy servers.

Java Java is a programming language for websites. If you deny Java, you run the risk of not having access to Internet sites created using this pro- gramming language.

ActiveX ActiveX is a programming language for websites. If you deny ActiveX, you run the risk of not having access to Internet sites created using this programming language.

Cookie A cookie is data stored on your PC and used by Internet sites when you interact with them, so you may not want to deny cookies.

Block WAN Request

By enabling the Block WAN Request feature, 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 net- work ports. Both functions of the Block WAN Request feature make it more difficult for outside users to access your network. This feature is enabled by default. Select Disable to disable this feature. Then click the Apply button and then the Continue button to save your changes.

Multicast Pass Through

IP Multicasting occurs when a single data transmission is sent to multiple recipients at the same time. Using this feature, the Router allows IP multi- cast packets to be forwarded to the appropriate computers. Select Enable to support the feature, or Disable to disable it.

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, IPSec Pass Through is enabled by default. To disable IPSec Pass Through, click on Disable and then the Apply button. Click the Continue button.

EtherFast® Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint

PPTP Pass Through

Point-to-Point Tunneling Protocol Pass Through is the method used to enable VPN sessions to a Windows NT 4.0 or 2000 server. PPTP Pass Through is enabled by default. To disable this feature, click on Disable next to PPTP Pass Through, and then the Apply button. Click the Continue button.

PPPoE Pass Through

PPPoE Pass Through allows your PC(s) to use the PPPoE client software provided by your ISP. Some ISPs may request that you use this feature on the Router. PPPoE Pass Through is enabled by default. To disable PPPoE Pass Through, click on Disable and then the Apply button. Click the Continue button.

Remote Management

This feature allows you to manage the Router from a remote location, via the Internet. To enable this feature, click on Enable, and enter the port number you want to use when accessing the Router remotely. Click the Apply button and then the Continue button. Remote Management must be activated before you can manage the Router from a remote location. If you wish to use this feature on the browser, enter http:\\<WAN IP Address>: port. (Enter your specific WAN IP Address in place of <WAN IP Address>, and enter the port number in place of the word port.)

To disable Remote Management, click on Disable, and click the Apply but- ton. Then click the Continue button.

Remote Upgrade

This feature allows you to upgrade the Router’s firmware from a remote location. To enable Remote Upgrade, click on Enable, and then click the Apply button. Then click the Continue button. Remote Management must be activated before you can manage the Router from a remote location.

MTU (Maximum Transmission Unit)

This feature specifies the largest packet size permitted for network trans- mission. Select Auto to leave the MTU at its factory default value. Select Manual to enable the MTU value you enter in the Size field. It is recom- mended that you keep this value in the 1200 to 1500 range. For most DSL users, it is recommended to use the value 1492.

To apply any of the settings you change on a page, click the Apply button, and then click the Continue button. To cancel any values you’ve entered on any page, click the Cancel button. For further help on this tab, click the Help button.

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Contents User Guide Copyright & Trademarks Table of Contents Introduction FeaturesEnvironmental 139 An Introduction to LANs and WANs IP AddressesWhy Do I Need a VPN? Network Setup OverviewYour Virtual Private Network VPN What is a Virtual Private Network? Firewall Router to Firewall RouterModem connection will not work from any other port PowerRouter’s Back Panel PortsRouter’s Front Panel LEDs WAN and LAN LEDsProceed to Connect the Router Connect the Router Connecting Your Hardware Together and Booting UpRouter’s hardware installation is now complete OverviewConfigure the PCs Configuring Windows 95, 98, and Millennium PCsGo to Configure the Router Configuring Windows 2000 PCsConfiguring Windows XP PCs Configure the Router Advanced Proxies. Click Direct Connection to the Internet Obtain an IP Address AutomaticallyStatic IP Address Enter the Gateway AddressPPPoE RASQuick and Easy Router Administration Cable/DSL Firewall Router’s Web-based UtilitySetup User Name and Password Static IPWAN IP Firewall Multicast Pass Through Remote UpgradeBlock WAN Request IPSec Pass ThroughEstablishing a Tunnel VPNLocal Secure Group and Remote Secure Group Remote Security Gateway Encryption AuthenticationKey Management Instant Broadband Series Advanced Settings for Selected IPSec Tunnel PhaseOther Settings PasswordStatus Dhcp Log Help Advanced FiltersInstant Broadband Series Forwarding UPnP Forwarding Port Triggering Dynamic Routing Static RoutingDMZ Port DMZ HostDMZ Host Address Current DMZ Host MAC Address CloneDynDNS.org DdnsCommon Problems and Solutions Appendix a TroubleshootingTZO.com For Windows XP For Windows NTFor Windows 95, 98, and Me For Windows XP Am not able to access the Router’s web interface Setup Can’t get the Internet game, server, or application to work To start over, I need to set the Router to factory default Click the Advanced = Filter tab Need to use port triggeringFrequently Asked Questions TCP/IP is compatible with the Router Appendix B Maximizing VPN Security Windows 2000 or Windows XP IntroductionEnvironment Step One Create an IPSec PolicyStep Two Build Filter Lists Filter List 1 win-routerIP Address Filter List 2 router=win Figure C-6Step Three Configure Individual Tunnel Rules Tunnel 1 win-routerShared key, as shown Respond Using IPSec XYZ12345. ClickString to Protect Negotiate Security Key exchange pre AcceptTunnel 2 router-win Preshared key, Action Require Security This string to protectKey Exchange XYZ12345Figure C-24 Step Four Assign New IPSec PolicyStep Five Create a Tunnel Through the Web-based Utility Figure C-28Appendix E How to Ping Your ISP’s E-mail & Web Addresses Appendix D Snmp FunctionsFigure E-1 Appendix F Installing the TCP/IP Protocol TCP/IP installation is now completeFigure G-1 For Windows NT, 2000, and XPFigure G-5 Appendix H Glossary 129 131 133 135 137 Appendix I Specifications EnvironmentalSales Information Appendix J Warranty InformationAppendix K Contact Information Web FTP SiteCopyright 2003 Linksys, All Rights Reserved