Is it possible to ban a particular IP in MyBB?
Yes.
*Go to your adminCP
*Under "Board settings", click "Change"
*Find "Banning Options"
*There will be a field for IPs, enter it.
*Click submit
You're done! IP BANNED!
Was this a test, Protoman? I can't believe you didn't know that by now? LOL
[wiki]Admin_CP_Board_Settings#Banning_Options[/wiki]