Hello,
I'm not sure this is the right forum, but hey, this is the router I have so I might as well give it a shot
Description of my home environment: DSL (pacbell, no static IPs) behind a Linksys (BEFSR41, 1.37 from the box, no flashing, IP 100), 3 PCs (IP 10, 11, 12) connected on ports 1, 2 and 3 of the router. All normal apps (browser, news, etc.) work perfectly on all machines, and so do more unique apps per PCs (web server, ftp server, telnet server on PC 10, ICQ and Napster on 11, games (Quake3, EQ, ...) on PC 12), EXCEPT that MSN Messenger doesn't want to connect from PC 11 or PC 10 (didn't try from PC 12).
The IP forwarding is set as:
21 - 23 -> PC 10
80 - 80 -> PC 10
and PC 11 used to have
6891 - 6901 -> PC 11
1863 -> PC 11
5190 -> PC 11
for MSN Messenger (and more for ICQ and Napster), but it didn't work. So I went in, and started removing ALL the other forwarding to try and fix MSN, but it didn't help.
So, finally, I put PC 11 in DMZ (my forwarding table is now ONLY the 21-23 and 80 on PC 10, but I tried even without these), and MSN Messenger *still* doesn't work
Help!!!