I have AT&T Uverse and a 2 wire router. I have port forwarded all of the necessary ports that I found listed at:
Yet, when I test my xbox, my NAT is still coming up strict. As a test, i put my xbox into DMZ mode, which opens all the ports to your device. This solved the issue. However, my Xbox One is my current DMZ device and I cannot have two, so I need to open my NAT on my xbox 360 some other way. Any help would be appreciated.