As much of the Combat Arms community has learned, Combat Arms was attacked by an unknown assailant earlier yesterday evening. This issue has since been resolved as of earlier today. While the method used to bar players from entering the game is currently under investigation, Nexon assures that this issue has been resolved and that players can now return to having fun.
In addition to this, there is an active notice that Vivox voice client services for in game communication will be unavailable for an unspecified amount of time. Nexon will have service back up soon.