So recently got a Westell 7500 from my ISP, which is CenturyLink. I forwarded all the ports I needed to such as 3074, 55, 88, 53, and 80. The same ports I had forwarded on my old modem/router bridge that gave me an Open NAT. So I checked my NAT on my 360 and it said it was Open. Well 1 or 2 days later it went to Moderate again and I hadn't changed anything. So I did some reading that said if you manually forward ports and have UPnP enabled it could cause conflicts. So I disable UPnP and power cycled my modem and I had Open NAT again. A day or 2 later it's back to Moderate NAT, again I haven't changed anything. I just power cycled the modem and it went back to Open. None of the IPs are changing, nothing at all is changing. What in the world is causing it to switch like this?