Hey everyone After fiddling around with absolutely every setting I had in my network, two routers and pretty much changing everything that worked for ages fluently I stumbled upon the following: Disabling any Teredo activity blocking on the router. As it seems, XOne uses Teredo protocol for its multiplayer connections and it is not 100% standard conform why it is blocked by some routers. This lead for me to regular disconnects, while everything else was working. Since I disabled this protection on my router it works like charm. I hope this helps some of you, too. Cheers