[Powerlord]

Originally Posted by ttasdasda Having analyzed several dumps, I am yet to encounter a 26900 port packet.

Have you checked outgoing traffic? My understanding is that the game server uses port 26900 for outgoing traffic to Steam unless you override it using -sport on the command line.

Edit: For people on older games such as CSS or TF2, they may still have the bug where the game server adds 1 to the sport number, so the default outgoing port is 26901 instead.