If you some how managed to get your IP address blocked by cPHulk, you’ll not be able to remove the block the regular way via the WHM. If you have access to the shell on the server, IE: direct physical access, OR, if it’s a VPS, you can SSH to the hardware node, then connect in to the container, then you can remove the block via command line.
Once you are at a shell prompt, run the following commands:
mysql cphulkd
delete from logins where IP = 123.123.123.123
delete from brutes where IP = 123.123.123.123
You have now been removed from the cPHulk blocked list, and should have no problem logging into the server now.