You said: 'timed out' means server and client were not able to communicate for a specified time (such as 10 seconds). If they reconnect the cable before exceeding the time-out time, everything will be okay.
That's true, I meant in these 10 seconds, the player who want to cheat can move around and reconnect the cable, that's kind of cheat.
So, how can i avoid it? I want anyone who do this get timed out directly.