Need your help

Well i know this forum's purpose is to teach you or help you about hacking but sometimes you get tired of that and try to create a server for entertaiment or something, well i got a big problem someone in my server is pissing me off, he is using multircon im not sure whats that about but he blocked and starts hacking, (i wish i had that a few years ago lol)

so... there's a way to stop him? hack him? fuck him? stop that program? i got his ip though...

i'll love if you could help me

thanks

by the way im talking about cod4 servers

Change the rcon password, make it more secure. And ofc block him and his IP from the server. Depending on what OS you're running, there are different way of doing so, just Google it.