Need to change NAT settings for xbox live

I just ran into the Strict NAT issue with CoD4. After hours of fighting this I finally figured out what the cause was.


A few months ago for a unrelated test my buddy gave me his old Speedstream modem. Well out of the blue while on hold with Xbox Live support I swapped my modem out with his and BAM, my NAT was OPEN. I flipped over the modem and it was a Siemens SpeedStream 4100. The modem that I received from AT&T was a Siemens SpeedStream Rev B.

So something in the latest Rev B SpeedStream modem keeps your NAT set to strict. I would recommend calling AT&T and see what they can do.


Also you will still need to have UPnP and Gaming Mode enabled or the proper ports forwarded on your router.

Hey, I've had the same problem too with my NAT but it said medium instead of restricted. I havent tried this yet cause I'm at work but you restart your router by just inpluggin the power cord and waiting 20 seconds than trying again.

Hope that works!