How to have server show up on client list

[epoch]

Hi - thanks for the reply.

I understand what you're saying. However, the server isn't running a firewall at present. Nothing's being blocked. That's why I'm so confused. There's nothing else running on the box too (no TS3 etc) so no port conflict. However if I start up TS3, or an ArmA2 server on that box they work fine.

I've been running a wide variety of game servers on both Linux/Unix and Windows since 1997, and I've never been this stumped!!