bullsh*t i have the same problem, and ONLY with DayZ.. it happens randomly.. but when it does, regardless to what server i'm connecting to it disconnects me and my internet shuts down for everyone who uses my network in my home, and i have to restart the router... And yes, i have uPnP enabled, and even forwarded some ports from Arma2 just in case, updated the firmware... tried different settings, still sometimes it disconnects my internet when i try to play DayZ... it DOES NOT happen and NEVER HAPPENED with any other multiplayer game, never. And there's multiple similar complaints about DayZ shutting down the internet connection even from the mod, here are a few examples: http://forums.dayzgame.com/index.php?/topic/135497-internet-cuts-out-when-i-close-arma-2/?hl=%2Bdayz+%2Bdisconnects+%2Bmy+%2Binternet#entry1328588 http://forums.dayzgame.com/index.php?/topic/34670-connecting-to-a-dayz-server-temporarily-disables-my-internet-connection/?hl=%2Bdayz+%2Bdisconnects+%2Bmy+%2Binternet#entry349877 http://forums.dayzgame.com/index.php?/topic/51553-wireless-internet-disconnecting-when-joining-any-server/?hl=%2Bdayz+%2Bdisconnects+%2Bmy+%2Binternet So i'm pretty sure it's a problem from DayZ, it's random though, so not everyone gets it.. i don't know what might cause it, maybe the packets sent from DayZ are regarded as some malware by the router, but then i tried to disable the routers firewall, and the windows' firewall, even enabled DMZ with my IP, tried literally everything, and still it happens from time to time...