Removing an IP from IP Deny Manager
If you happen to accidentally block some dynamic IPs and you want to delete it from the block list, it can be easily done with the Cpanel control panel.
To delete IP from IP block list:
Click IP Deny Manager in Cpanel hosting account control panel.
Select the IP address to be deleted from the Remove an IP Deny drop down list.
Click Remove to delete the IP address from the block list.