Linksys AG300 manual What is Network Address Translation and what is it used for?

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ADSL Gateway

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 computer connected to the private LAN is never transmitted on the Internet. Furthermore, NAT allows the Gateway to be used with low cost Internet accounts 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 Gateway support any operating system other than Windows 98SE, Windows Millennium,

Windows 2000, or Windows XP?

Yes, but Linksys does not, at this time, provide technical support for setup, configuration or troubleshooting of any non-Windows operating systems.

Does the Gateway support ICQ send file?

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

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. (Port 8080 usually works well but is used for remote admin. You may have to disable this.) 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 Gateway 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 Gateway?

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 computer.

Appendix A: Troubleshooting

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Frequently Asked Questions

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Contents Adsl Gateway Copyright and Trademarks How to Use this GuideWord definition Table of Contents Adsl Gateway Ports and Reset Button on Side Panel Network25 List of PCs Introduction WelcomeWhat’s in this User Guide? Adsl Gateway IP Addresses Planning Your NetworkGateway’s Functions What’s an IP Address?Dhcp Dynamic Host Configuration Protocol Servers Dynamic IP AddressesPorts and Reset Button on Side Panel Getting to Know the Adsl GatewayPower LEDs on Side PanelBottom Panel Bottom Panel with Stand Closed PositionConnecting the Gateway to a Computer Connecting the Adsl GatewayOverview Connect a PC Configuring the Adsl Gateway SetupSecurity Access RestrictionsAdministration Applications & GamingBasic Setup Tab How to Access the Web-based UtilitySetup Tab Internet SetupRFC 1483 Bridged Dynamic IP Static IPRFC 1483 Routed IPoARFC 2516 PPPoE RFC 2364 PPPoAOptional Settings required by some ISPs Bridged Mode OnlyNetwork Setup Ddns Tab DdnsDynDNS.org TZO.comAdvanced Routing Tab Advanced RoutingPVC Routing Policy 15 Routing TableConfiguring the Adsl Gateway Setup Tab Firewall Security TabFirewall Tab Additional FiltersVPN Passthrough VPN TabIPSec VPN Tunnel 20 VPN Settings Summary 21 Advanced VPN Settings Access Restriction Tab Internet Access Tab25 List of PCs Single Port Forwarding Tab Applications & Gaming TabSingle Port Forwarding Port Range Forwarding Tab 28 Port Range ForwardingPort Triggering Tab DMZ TabQoS Edit list of QoS SettingsQoS Tab PVC QoS PriorityConfiguring the Adsl Gateway Applications & Gaming Tab Gateway Access Administration TabManagement Tab UPnP IGMP-ProxyIGMP-Snooping Reporting Reporting TabEmail Alerts Backup Configuration Diagnostics TabBackup&Restore Tab Restore ConfigurationReboot Tab Factory Defaults TabFirmware Upgrade Tab Upgrade from LANGateway Information Status TabGateway Tab Internet ConnectionLocal Network Tab 43 Local NetworkDSL Status DSL Connection TabPVC Connection Common Problems and Solutions Appendix a TroubleshootingNeed to set a static IP address on a computer Want to test my Internet connection Adsl Gateway Adsl Gateway TCP UDP Can’t get the Internet game, server, or application to work Firmware upgrade failed, and/or the Power LED is flashing To start over, I need to set the Gateway to factory defaultNeed to upgrade the firmware My DSL service’s PPPoE is always disconnectingPower LED flashes continuously Is IPSec Passthrough supported by the Gateway? Frequently Asked QuestionsWhere is the Gateway installed on the network? Does the Gateway support IPX or AppleTalk?What is Network Address Translation and what is it used for? Does the Gateway support ICQ send file?What is DMZ Hosting? How do I reset the Gateway? What are the advanced features of the Gateway?What is a MAC Address? Is the Gateway cross-platform compatible?Figure B-1 IP Configuration Screen Windows 98 or Me InstructionsWindows 2000 or XP Instructions Figure B-3 MAC Address/Physical AddressFigure C-1 Firmware Upgrade Appendix C Upgrading FirmwareAppendix D Glossary Adsl Gateway Adsl Gateway Adsl Gateway Adsl Gateway Appendix E Specifications Storage Humidity Appendix F Warranty Information Appendix G Regulatory Information FCC StatementAdsl Gateway Adsl Gateway Adsl Gateway Adsl Gateway Adsl Gateway Appendix H Contact Information Europe Mail Address