To add a new IP address(es) to your cPanel server, please use the "Add a New IP Address" feature in the WHM interface. This interface will ensure the IP(s) are useable by the cPanel server.
The interface will support the following formats:
Class C CIDR (e.g. 192.168.4.0/25).
IP Address Range (e.g. 192.168.4.128-255)
If your server is using NAT (Network Addresses Translation), use the local IP, not the public IP.
If your server is NOT using NAT (Network Addresses Translation), then use the public IP.
To add additional IP(s), please do the following.
1. Login into WHM.
2. Navigate to "WHM: Home -> IP Functions -> Add a New IP Address".
3. Add the IP/IP ranges to text boxes using the above formats.
4. Click "Submit"
For more information, please review our official documentation on the "Add a New IP Address" feature.