How to Fix your strict NAT on Xbox Live to open
Your home router is automatically programmed to run firewalls to protect your computer from viruses. Unfortunately, these firewalls often mistake programs needed for online gaming as intruders and block them.
In this tutorial, learn how to set you NAT settings to "Open" and take advantage of all XBox Live has to offer. This method is safe and won't affect the protection on the PC's in your household. If done correctly, this should only open up your XBox. Happy gaming!