My X1 is saying my Nat Type is Open whilst my COD Ghosts says its Moderate. I have a ActionTech Modem that has a Gateway built in; which might be part of the issue; NetGear WNR2000 v2 Router. that everything else is connected too. All wired connections.
X1 has a Static IP address and have forwarded the following ports:
Xbox Ports:
53, 80, 3074 TCP
53, 88, 500, 3074, 3544, 4500 UDP
Call of Duty Ghosts Console Ports:
80, 81,443, 3074, 5223 TCP
36081, 3074, 3075, 3478 UDP
Upnp or what ever is not checked nor is DMZ
Error message is Your network is behind a cone NAT. I have ran out of ideas. This is the same setup I used on my 360 and on my PS3. I had to forward ports on both consoles but it work this isn't.