Chunkymonkey153
Newcomer
My xbox 360 nat has suddenly changed from open to strict. I am using a Linksys wrt300n with UPNP. Up until about a week ago it was working fine then with no settings firmware or other changes it goes from open to strict. I have tried everything to get it back to open. I tried port forwarding, DMZ, and anything else i could find online and nothing seems to be working. I am growing desperate can anyone help me?