I don't know if you guys know about Garry's mod or anything, Just thought id ask.

Ive been trying to make my own server for the past 3 days. Ive made a dedicated server and a listen server. Opened all the ports for half-life2(got the port code things from portforward.com) Every server i try to make ends up as a LAN server.
Ive tried sv_lan 0 and heartbeat but they do not work.
Ive watched probably 15 videos on how to make one and read about 20 tutorials.

I'm using a 2wire router

Do you guys have any advise or help you can head my way?