Halo 4 servers unavailable

Hi Guys
Had this message for quite a few hours. Not sure if it is a wifi router issue or not. But I can not see all the games available. I can select a game but all players have values of SR1 . Also cant seem to get anything to download in the game, like service status etc, says servers unavailable. A lot of web topics suggest forwarding issue in router to certain ports but I cant believe this would have changed.
thanks for any help

It’s not your router. It appears to be a problem with the servers themselves. Myself, another, and no doubt many more have been experiencing this issue for several hours now. Unfortunately, all we can do is report it, hope that they’ve noticed, and wait for a fix.

EDIT: Also found these threads (1, 2), both of which have people reporting the same issue.