The cPanel has a default brute force protection service called cPHulk Brute Force Protection. To disable cPHULK via browser just use “/scripts2/doautofixer?autofix=disable_cphulkd” after WHM port .
For example :
https://hostname or Server IP :2087/scripts2/doautofixer?autofix=disable_cphulkd
Change the Server IP or with your Server IP.
That’s It.