We've just shifted the DEFCON and Multiwinia metaservers to new hardware. The new IP is 18.104.22.168, but it'll probably take an hour or so for the DNS update to flash around the world. If you have any problems joining games or authenticating after that please let me know and I'll rush a fix out.
I've just shifted the Multiwinia autopatch server. Any problems please post in here.
Mark on 17th February 2012 . 3