CF Client Error

The hack tool thing doesn't necessarily mean that a program on your computer has been recognized as a hack, that message is more like an error message, but they're errors built in to stop hackers. You'll get 0:4:0:0 if your connection to the server is too laggy, I have no idea what 0:2:3:0 is though.

I think I heard from someone that error 18_1 has something to do with bullet trajectory to prevent hackers from shooting through walls, those error codes can be set way too sensitive so that simple lag will trigger them.