Hi, I recently purchased a Zyxel PK5000Z modem from qwest, upgrading from my M1000 actiontec. My reasoning was that port forwarding was not working as part of the router on the actiontec, and the pk saved me some money on my bill. So, what I always start out doing on modem/routers is restrict DHCP to 192.168.0.2 to 192.168.0.10, limiting the number of devices that could connect, and I don't know if that really matters or not for this problem, but figured I would throw everything out there. So....My actual problem is that now when boot up xbox360 I get a xbox360 live "nat strict" error. I have all the ports suggested for xbox, and the particular games forwarded, and DMZ turned on to the static IP I assigned to the xbox. I started out assigning a static IP reservation in the router for the xbox (the one I set on the xbox), but soon found not needing this. I ran the firmware diagnostic tool in the utilities menu and the "encapsulation test" failed, I called qwest, they have no clue, but sounded like a level 1 dude, but he authorized a new actiontec pk5000. Sooo....in conclusion, I just want to get some input incase this happens with the new one that is coming, or if your opinions support the "bad modem" theory.