thanks for answer! I would like to use some authetification system but I need to know how hacks work. How someone can change my server's content if server is ran on his own machine? Does he somehow stick another program to my server? Or he's just sending false values to / from server via for example windows command line?
edit:
hplus0603,
thanks a lot for your tips! I feel that network is the hardest challenge that I have faced so far. Though I think that most of the game engine is already done and if I managed to succeed with network coding, the game could be quite fun
. NAT punch-through is a thing that scares me the most... It seems there are almost no any example codes of doing that ;/