Cannot connect to XBOX party, NHL2013

If you have a problem connecting to the party mode in the Xbox 360, for example, in the game NHL 2013 problem is in the NAT on your router.
You can set port forwarding:

• Port 88 (UDP)
• Port 3074 (UDP a TCP)
• Port 53 (UDP a TCP)
• Port 80 (TCP)

Or if you do not have extensive configuration and the demand for greater network security, you can set the DMZ IP address of the Xbox

http://www.cbrown.co/2012/04/09/open-nat-on-xbox-live/