I have changed internet providers from comcast to qwest. I now use a zyxel-pk5000z router, and found my NAT type was set to strict. I followed the directions here and opened all of the ports, I also tried having UPnP turned on. After doing both can still connect to xboxlive but I still have a strict NAT type. Any help on the subject would be great. I read through the guide provided here on the forum and I'm still having this problem!