Linksys BEFSX41 manual Frequently Asked Questions

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Instant Broadband® Series

Frequently Asked Questions

What is the maximum number of IP addresses that the Router will support? The

Router will support up to 253 IP addresses.

Is IPSec Pass-Through supported by the Router? Yes, it is a built-in feature that

the Router automatically enables.

Where is the Router installed on the network? In a typical environment, the Router is installed between the cable/DSL modem and the LAN. Plug the Router into the cable/DSL modem’s Ethernet port.

Does the Router support IPX or AppleTalk? No. TCP/IP is the only protocol stan- dard for the Internet and has become the global standard for communications. IPX, a NetWare communications protocol used only to route messages from one node to another, and AppleTalk, a communications protocol used on Apple and Macintosh networks, can be used for LAN to LAN connections, but those protocols cannot connect from WAN to LAN.

Does the WAN connection of the Router support 100 Mbps Ethernet? Yes, and it does, of course, support 100 Mbps over the auto-sensing Fast Ethernet 10/100 switch on the LAN side of the Router.

What is Network Address Translation and what is it used for? Network Address Translation (NAT) translates multiple IP addresses on the private LAN to one public address that is sent out to the Internet. This adds a level of security since the address of a PC connected to the private LAN is never transmitted on the Internet. Furthermore, NAT allows the Router to be used with low cost Internet accounts, such as DSL or cable modems, when only one TCP/IP address is provided by the ISP. The user may have many private addresses behind this single address provided by the ISP.

Does the Router support any operating system other than Windows 95, Windows 98, Windows 2000, Windows NT, or Windows XP? Yes, but Linksys does not, at this time, provide technical support for setup, configuration or troubleshoot- ing of any non-Windows operating systems.

Does the Router support ICQ send file? Yes, with the following fix: click ICQ menu -> preference -> connections tab->, and check I am behind a fire- wall or proxy. Then set the firewall time-out to 80 seconds in the firewall set- ting. The Internet user can then send a file to a user behind the Router.

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

I set up an Unreal Tournament Server, but others on the LAN cannot join. What do I need to do? If you have a dedicated Unreal Tournament server running, you need to create a static IP for each of the LAN computers and forward ports 7777, 7778, 7779, 7780, 7781, and 27900 to the IP address of the server. You can also use a port forwarding range of 7777 ~ 27900. If you want to use the UT Server Admin, forward another port (8080 usually works well but is used for remote admin. You may have to disable this.), and then in the [UWeb.WebServer] section of the server.ini file, set the ListenPort to 8080 (to match the mapped port above) and ServerName to the IP assigned to the Router from your ISP.

Can multiple gamers on the LAN get on one game server and play simultaneously with just one public IP address? It depends on which network game or what kind of game server you are using. For example, Unreal Tournament supports multi-login with one public IP.

How do I get Half-Life: Team Fortress to work with the Router? The default client port for Half-Life is 27005. The computers on your LAN need to have “+clientport 2700x” added to the HL shortcut command line; the x would be 6, 7, 8, and on up. This lets multiple computers connect to the same server. One problem: Version 1.0.1.6 won’t let multiple computers with the same CD key connect at the same time, even if on the same LAN (not a problem with 1.0.1.3). As far as hosting games, the HL server does not need to be in the DMZ. Just forward port 27015 to the local IP address of the server comput- er.

How can I block corrupted FTP downloads? If you are experiencing corrupted files when you download a file with your FTP client, try using another FTP program.

The web page hangs; downloads are corrupt, or nothing but junk characters are being displayed on the screen. What do I need to do? Force your Ethernet adapter to 10Mbps or half duplex mode, and turn off the “Auto-negotiate” feature of your Ethernet adapter as a temporary measure. (Please look at the Network Control Panel in your Ethernet adapter’s Advanced Properties tab.) Make sure that your proxy setting is disabled in the browser. Check our web- site at www.linksys.com for more information.

If all else fails in the installation, what can I do? Reset the Router by holding down the reset button until the Diag LED fully turns on and off. Reset your cable or DSL modem by powering the unit off and then on. Obtain and flash the latest firmware release that is readily available on the Linksys website, www.linksys.com.

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Contents User Guide Copyright & Trademarks Table of Contents Environmental 139 FeaturesIntroduction An Introduction to LANs and WANs IP AddressesYour Virtual Private Network VPN Network Setup OverviewWhy Do I Need a VPN? What is a Virtual Private Network? Firewall Router to Firewall RouterModem connection will not work from any other port PowerRouter’s Back Panel PortsProceed to Connect the Router WAN and LAN LEDsRouter’s Front Panel LEDs 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 Key Management AuthenticationEncryption 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 Host Address DMZ HostDMZ Port Current DMZ Host MAC Address CloneDynDNS.org DdnsTZO.com Appendix a TroubleshootingCommon Problems and Solutions For Windows 95, 98, and Me For Windows NTFor Windows XP 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 PolicyIP Address Filter List 1 win-routerStep Two Build Filter Lists 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
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