Helo about 2 months ago on my xbox i wasnt able to join any of my friends anymore. I contacted XBOX support yesterday and after about an hour long conversation trying to find the problem they discovered that the ports that need to be opened to play xbox are closed. They told me to get in contact with my ISP and ask them to open the following ports:
Port 88 (UDP)
Port 3074 (UDP and TCP)
Port 53 (UDP and TCP)
Port 80 (TCP)
Port 500 (UDP)
Port 3544(UDP)
Port 4500(UDP)
Please help.