Does not work with all Router/Firewall types, go to Microsoft's official site for the list of compatable, and known issue routers. NAT settings are probably one of the best innovations in console gaming... don't knock em, Franchises such as Call of Duty, Modern Warfare, Halo, and Battlefield would be limited greatly without the addition of this tool. Chances are if you play any of the listed franchise games online.. your NAT settings are open already! Good luck!
I'm confused, I checked my router settings and everything is enabled and I can play online games no problem but with MNC it shows Nat type: Moderate. Doesn't seem normal. It should be open.
Do you play any other online games like MW2 or Halo? Do those say NAT Moderate? The NAT type is an xbox setting, so it will not be different from game to game, moderate just means you can join players with the same NAT, so you would still be able to play, just not with everyone.