I found just forwarding these worked more than fire.
Application: COD7BOPS External port: 3074 Internal port: 3074 Protocol: TCP/UDP
In addition, the following ports are required for Steam connections
Application: COD7OPS1 Port range: 27000 - 27030 Protocol: UDP
Application: COD7OPS2 Port range: 27014 - 27050 Protocol: TCP