Connect to ShooterGame over steam?

Is this is possible to host a server info over steam using the AppId 480?

  1. I start my game. start a server with some bots.
  2. I start another game and go in my server list to see if the server is present, i see nothing.

My router forward this following port to my computer (7777, 7778, 27015).

Any help would be appreciated!

Thank you!