Aimbots are undetectable as far as I can see.
Speed hacks etc are easily preventable by only sending player input to the server. That way the server still handles the movement.
EDIT: I am assuming you are still trying to make an MMORPG with hardly any experience? I hope you read the articles I posted in that other thread.
You really should use Google more.
It was a question, atm Im currently working with openGL and LWJGL.
As such if I have a question, id rather know the answer as soon as possible than just leave it back.
Sorry for asking a question seems like Im being continuously pushed away by this community.