Also das hier hab ich gefunden:
"Advanced Features
The RT311 has a number of features that network-savvy users will appreciate. It supports the RIP-1, RIP-2M, and RIP-2B routing protocols and you can set the unit to send only, receive only or do both with its routing information. You can set up to 8 static routes in the RT311 itself. These features make it easy to incorporate the RT311 into larger networks with multiple routers.
If you are going to open holes in your firewall, please read this information on Security.
You can open holes in the RT311's firewall so that servers on your LAN can be accessed from the Internet, but you are limited to 8 port-number-to-LAN IP mappings. You can't specify TCP or UDP protocol, and you can't map port ranges, either.
Update 6/11/01 V3.25 firmware adds 10 sets of port range forwarding.
One of the eight mappings is dedicated to the Default Server mapping. This is similar to the DMZ Host, or Exposed Computer feature on other routers. Any inbound service request that doesn't have a defined IP address to handle it will be sent to the Default Server. This leaves seven single port mappings for users to set. If you want anything more complicated in the way of mapping, you'll have to dig into Filters.
Filtering is very flexible, but the hardest to use feature of the RT311. Filters allow you to block or pass data matching specific criteria that you set from entering or leaving your LAN. Netgear has provided powerful filtering capability, but, unfortunately, you need to configure it at a level that requires more understanding of networking protocols than most users will have. The RT311 comes by default with filters enabled that block telnet from the WAN side and limit Net BIOS traffic to the LAN.
Network Administrators will find a complete set of "Maintenance" features, all accessible via Telnet. System status can be monitored, the unit can be reset, and error logs can be examined, among other features. If you have a system that supports the UNIX syslog feature, the RT311 will even log activity to it (see this page for a list of Windows and MacOS syslog clients). Finally, for the very adventurous, you can enter the RT311's OS mode and do packet traces and other fun stuff!"
ich schreib trotzdem mal den entspr. link dazu:
http://www.practicallynetworked.com/review.asp?pid=318
und weil ich grad dabei bin, hier ne Seite, die sich direkt mit den RT311's befasst:
http://www.netgear.org/
*Edited:*
Thema Filter: irgendwie musst du ja den weiterzuleitenden Port / IP Adresse definiert haben, sowas hat ne bestimmte Syntax, also Sprache / Ausdrucksweise, und die Werte müssen halt auch stimmen....