If you are hosting over the internet, your local IP address won't work because it is "local". I think you can try the router ip + port instead... not 100%

I dont think there is a special IP address for your game, the IP address you want is your own IP.
Make sure you have up to date patches ie Server versions.
You may also try this. Go to the icon you use to start the game, select properties, at the end
of the Target path after the " type in + set net_port 23978.
Hope this helps
Melp334

Thanks, That helped A LOT