- last post: 01.01.0001 12:00 AM PDT
NAT = Network Address Translation
Normally when your NAT is MODERATE or STRICT it means you have an incompatible device. What you can do is, IF you're on a router connection -- try a direct connection to the modem and see if the same thing happens, if it doesn't, what you want to do is contact your router manufacture to assist you in oening these 3 firewall ports on your router (UDP88, UDP3074, TCP3074). After opening those ports, your NAT should be open then, IF it doesn't - you may just need to replace your router. To check compatibility go to http://www.xbox.com/en-US/support/connecttolive/xbox360/homen etworking/equipment.htm it has a list of XBL compatible devices as well as sometimes your ISP could be the issue IF it's not XBL compatible.
So what you would want to do is, test your XBL connection and see what your NAT says as well as have the friend that you're not able to connect to do the same thing and see what his/her NAT is before going further. IF both of your NAT is strict and you're both on a router connection - both try a direct connection to the modem at the same time and try connecting that way, if you still can't, check compatibility then you may want to contact xbox customer support.