For cPanel & WHM version 11.50
If you use a firewall, you must disable it before you run the cPanel & WHM installation.
Red Hat® Enterprise Linux® and CentOS distributions allow you to disable the firewall for the operating system’s installation configuration. We strongly recommend that you use this method.
Deactivate the firewall
CloudLinux™, CentOS 5.x and 6.x, and RHEL 5.x and 6.x
Run the following commands to deactivate the firewall:
Run the following commands to deactivate the firewall, where
~/firewall.rules represents the firewall rules file:
Third-party firewall clients
For cPanel & WHM to run on your web server, the OS firewall must remain disabled. When the installation process finishes, configure your firewall with a third-party client. We recommend that you use APF or CSF.