What ports do I need to forward in port forwarding? What ports for nmrih server?August 31st, 2012 by Brentonator
First, figure out what your public IP is. It's easy go HERE and it tells you right at the top.Second, make sure you have 27015 (TCP & UDP) forwarded on your router. Not sure how to forward ports? Go to portforward.com which is one of the best places to learn how to port forward.
TCP 27015 (only if you need rcon)
After you have opened your ports you can confirm if your port is open using You Get Signal's Open Port Checker
Other suggested ports for No More Room in Hell (and other Source Engine games):
UDP 27000 to 27017
TCP 27030 to 27039
Note: Your ISP may prevent you from opening ports. Also, certain routers do not support the feature despite having the option to do so. Additional configuration options may override opening your port.