I have a Linksys router and I'm having a NAT problem with a friend over Xbox Live. To fix this, I'm told I need to open 3 ports for my xbox. The problem is, I don't know how to do this... please help!
You need to navigate to your router via your browser. The address is normally something like 192.168.1.x. Don't forget that when you forward the ports you need to define a static address on your 360.