Block an IP address or domain using IP Blocker – cPanel

Login to cPanel.
Tutorial: login from the Client Area or the direct link.

Find the Security section and click the IP Blocker link.

Add an IP or Range
On IP Blocker Page you are now able to add IP entries with following options:
Single IP Address
Single IP format will block a single IP address. 
Example: 192.168.0.1
Range
Range format will block a specified range of IP address from accessing website.
Example: 192.168.0.1-192.168.0.40.
Implied Range
Implied Range format work like Range format and it will block a specified range of IP addresses from accessing your website.
Example: 192.168.0.1-40.
CIDR Format
this CIDR format will block a specific subnet of the IP address.
Example:192.168.0.1/32
Implied IP address
this format implies IP address of 192…, where each represents a positive whole number. If you enter 192., the system blocks the access from any IP address that begins with 192.Example: 192.
Domain Name
You can enter domain name to block from accessing your website
Please Note that cPanel IP blocker tool will resolve the Domain to its IP address.

Click the Add button.

Click the Go Back button.