Instructions
Turn on the Xbox 360 and navigate to the "System" tab at the far right end of the "My Xbox" section of the menu.
Select "Network Settings" and choose "Edit Settings."
Highlight the top row of settings and press "A." Choose "Manual" and select "IP Address."
Enter the IP address your ISP (Internet Service Provider) has assigned you for use with your console. If your ISP has not assigned you an address, enter "0.0.0.0" and press "A" to reset the console's IP address, then press "B" and choose "Automatic" to have the console automatically acquire a new IP address with your correct region information.
Choose "Done" to finish changing your Xbox 360's IP settings. Reboot the console by turning it off and on again to connect to the Internet.