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: Cant Access Multiplayer online Xbox One

Additional Network Ports for Multiplayer Gaming: Cant Access Multiplayer online Xbox One
Stupid question, but are you have Xbox Gold Subscription to allow play online games?

 

Additional Network Ports for Multiplayer Gaming: Cant play online on FIFA17

Additional Network Ports for Multiplayer Gaming: Cant play online on FIFA17
When trying to play online i get an error message that "Your profile doesn't have permission to access this feature".