Hi I wondered if anyone could help I'm having some issues with NAT when trying to connect 2 xboxes through a single ADSL connection through my Draytek Vigor 2820N router whilst one xbox connects fine with an open NAT the other is usually moderate/strict i've tried port forwarding/triggering and DMZ and still the same outcome does anyone know how i can get the both working on open NAT also i've been having problems with games for windows live on th PC sharing some of the same ports with xbox live and when both the PC and xbox are on they keep cancelling each other out. Any ideas ?

I had enough problems setting my sons XBox up properly- let alone two!
The only possibility I can see is to have the XBoxes on separate LANs- for example 192.168.2.X and 192.168.3.X. Data on the open ports would then be forwarded to essentially isolated machines on different LANs.