Add Multiple shared IPs in WHM manually

You can't add shared root IP from WHM but you can add it via ssh manually.

 

Step One: Create a /var/cpanel/mainips/ directory if there isn't any:

# mkdir /var/cpanel/mainips/

Step Two: Create a /var/cpanel/mainips/root file, with all the Ips as folllows

10.0.0.10
10.0.0.12

Add new line as additional shared IP in WHM

verify from WHM>>Home>>IP Functions>>Show/Edit Reserved IPs

 

source: https://syslint.com/blog/tutorial/how-to-configure-multiple-shared-ips-in-whm/