Linksys BEFSR41 manual Using Remote Upgrade, Using MTU Maximum Transmission Unit, IP Forwarding

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Instant BroadbandSeries

Using Remote Upgrade

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

Using MTU (Maximum Transmission Unit)

This feature specifies the largest packet size permitted for network transmis- sion. Select Enable and enter the value desired. It is recommended that you leave this value at the 1200 to 1500 range. For most DSL users, it is recom- mended to use 1492. By default, MTU is set at 1500 when disabled.

IP Forwarding

Forwarding sets up public services on your network, such as web servers, ftp servers, or email servers. When users send this type of request to your network via the Internet, the Router will forward those requests to the appropriate PC. Before using Forwarding, the Router’s DHCP function must be disabled under the DHCP tab and the Router must be assigned a new static LAN IP address because the IP address may change when using the DHCP server.

EtherFast® Cable/DSL Routers

To add a server using Forwarding:

1.Enter the port number or range of ports used by the server. On the same line, select the protocol UDP, TCP, or Both, and enter the LAN IP address of the server that you want the Internet user(s) to access.

2.Configure as many entries as needed—the Router supports up to 10 ranges of ports. Click the Apply button when you’re done.

Using Port Triggering

Port triggering allows the Router to watch outgoing data for specific port num- bers. The IP address of the computer that sends the matching data is remem- bered by the Router, so that when the requested data returns through the fire- wall, the data is pulled back to the proper computer by way of IP address and port mapping rules.

1.Enter the application name of the trigger.

2.Enter the port range used by the application.

3.Enter the incoming port range used by the application.

4.Click the Apply button to continue.

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Contents EtherFast Cable/DSL Routers Copyright & Trademarks Table of Contents Package Contents for the 4-Port Router BEFSR41 One FeaturesIntroduction Linksys EtherFast Cable/DSL RouterPackage Contents for the 3-Port Router BEFSRU31 Package Contents for the 1-Port Router BEFSR11Getting to Know the 4-Port EtherFast Cable/DSL Router LAN Indicators4-Port Router’s Rear Panel Port Router’s Front Panel LEDsOne-Port Router’s Ports Getting to Know the 1-Port EtherFast Cable/DSL RouterOne-Port Router’s Rear Panel Port 1-Port Router’s Front Panel LEDs WAN Indicators3-Port Router’s Rear Panel Ports Getting to Know the 3-Port EtherFast Cable/DSL Router3-Port Router’s Front Panel LEDs ButtonsIP Addressing a Quick Lesson OverviewWhat’s an IP Address? LANs and WANsDynamic IP Addresses Dhcp Dynamic Host Configuration Protocol ServersConnecting Your Hardware Together and Booting Up Technical Checkpoint Uplinking Connecting More Devices to Your RouterInstalling the Windows 98 Driver Installing the BEFSRU31’s USB Port DriversInstant Broadband Series Installing the Windows 2000 Driver Instant Broadband Series Installing the Windows Millennium Driver Installing the Windows XP Driver Configuring PCs to Connect to the Cable/DSL Router Configuring Your Network with the Cable/DSL RouterConfiguring the Cable/DSL Router Cable/DSL Router’s Web- based Utility Quick & Easy Router AdministrationSetup Status Password StatusLog DhcpPC-cillin Settings ZoneAlarm Pro SettingsSecurity Software DownloadDynamic Routing HelpIP Filtering Using MTU Maximum Transmission Unit Using Remote UpgradeUsing Port Triggering IP ForwardingStatic Dynamic Routing Static RoutingDMZ Hosting MAC Address Clone TroubleshootingCommon Problems and Solutions Can’t access my e-mail or the Internet When I enter a URL or IP address, I get a time out errorFrequently Asked Questions Can’t obtain an IP address from my cable or DSL modemInstant Broadband Series Glossary Instant Broadband Series Instant Broadband Series Instant Broadband Series Instant Broadband Series Instant Broadband Series Instant Broadband Series Step One Pinging an IP Address How to Ping Your ISP’s E-mail & Web AddressesAppendix Step Two Pinging for a Web Address Installing the TCP/IP ProtocolTwisted-Pair Cabling TCP/IP Installation is now completePort Environmental Specifications Port Router SpecificationsCrimping Your Own Network Cables Straight-Through Cabling Cross-Over CablingBEFSR11 Copyright 2002 Linksys, All Rights Reserved Customer Support