Ban IP

[AntaresUeD]

I have this type of problem. I have ban an user , but this user have found the system to Unban Himself. I don't know how.

I want to know his IP, so I can ban the IP from the blog where is the chat xat. Someone Can Help me? Thanks.

[AntaresUeD]

yes i have banned him forever, but nothing, after some minutes it's again green. I want to know some system to block him.