I had statically set my Xbox IP address and then set it in DMZ on my Linksys E1000 months ago and it has been working fantastic. Even on CoD games... I had a random moderate NAT one day so I checked out my Xbox network configuration. For some reason all my static IP and DNS settings were changed to Automatic and had received an IP address in my router's DHCP range. Changed it back to the same static IP address I had been using (outside the dhcp range) and retested the LIVE connection. Strict. I retested. Strict. Did a complete power cycle with my modem, router and Xbox. Waited a minute or so - powered modem up, router, then Xbox. Same Strict result. So I changed the IP (still outside dhcp range) still got the Strict result... I don't get it. There have been no changes to my router, modem, Xbox, or cables. Absolutely nothing. Why the random change, after months of flawless connectivity, do I receive a Strict NAT while using DMZ?