Use cPanel → Security → IP Blocker to deny web access from selected IP addresses, ranges, or supported address patterns.
- Open IP Blocker.
- Enter the IP address or range.
- Add the block.
- Review the normalized CIDR entry in the blocked-address list.
cPanel implements these website blocks through .htaccess. Be careful with broad ranges: an implied value such as 10. represents an entire range, not one device.