Additional Network Ports for Multiplayer Gaming: Conccting too friends on games we have been ...

Additional Network Ports for Multiplayer Gaming: Conccting too friends on games we have been trying too get into games together but we have not
Me and my Friend have been having this same problem ove rand over again we cant seam too get into anygames together yet we both can get into games with other friends just not one another if you can help us I would be greatfull

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Additional Network Ports for Multiplayer Gaming: Two Xbox One's Cant play the same online game

Additional Network Ports for Multiplayer Gaming: Two Xbox One's Cant play the same online game
So my brother and I are trying to play Dying Light together but we cannot for some reason. He has his xbox one and I have my own. we both have the game and can play we other people but not with each other. we live in the same house, we have comcast xfinity.
router model number is : DPC3941T. VENDOR IS : Scientific-atlanta, inc.serial number is : 285898442. Please help we have tried to play together with multiple games like dying light, friday the 13th the game, and nothing works. please help ! I can access my
modem/ router as well .

 

Additional Network Ports for Multiplayer Gaming: multiplayer game for Forza

Additional Network Ports for Multiplayer Gaming: multiplayer game for Forza
Good evening I have a problem in the game Forza I can not play with my friends Online