You may need the MAC Address of your 360 when connecting your 360 to a Wireless router, to enter into a wireless client access list. To find your MAC Address do the following:-
- Start up the 360
- Go to My Xbox/System Settings/Network Settings
- Edit settings
- Additional settings
- Advanced settings.
- Take a note of the letters and numbers under the "Wired Mac Address" or "Wireless Mac Address" They should be both the same anyway.
- The MAC Address will look something like this 00-0D-61-53-E2-52