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Fix: cPanel Does Not Support NetworkManager Enabled

If you encounter the following error while installing cPanel on a CentOS-based server, this guide will help you resolve it quickly.

The Error Message

593 (ERROR): ********************* ERROR *********************
594 (ERROR): NetworkManager is installed and running, or
595 (ERROR): configured to startup.
596 (ERROR):
597 (ERROR): cPanel does not support NetworkManager enabled
598 (ERROR): systems. The installation cannot proceed.
599 (ERROR):
600 (ERROR): See https://go.cpanel.net/disablenm for more
601 (ERROR): information on disabling Network Manager.
602 (ERROR): ********************* ERROR *********************
603 (FATAL): Exiting...

Why This Happens

cPanel requires direct control over the server network configuration. NetworkManager is a dynamic network control utility that can conflict with how cPanel manages networking. cPanel and WHM are not compatible with NetworkManager and will refuse to install if it is active.

The Quick Fix

Run both commands below and then restart the cPanel installation:

systemctl stop NetworkManager.service
systemctl disable NetworkManager.service

Verify NetworkManager is Disabled

systemctl status NetworkManager

The output should show "inactive (dead)" and "disabled".

Ensure Standard Networking is Running

systemctl enable network
systemctl start network

Then Resume the cPanel Installation

cd /home && curl -o latest -L https://securedownloads.cpanel.net/latest && sh latest

For AlmaLinux / Rocky Linux 8+

On newer RHEL-based distributions, NetworkManager is the default and cannot be fully removed. cPanel versions 100+ support NetworkManager on these systems. Make sure you are running the latest cPanel installer.

Additional Notes

• Always ensure your server has a static IP configured before installing cPanel.
• After disabling NetworkManager, verify your network connectivity with ping google.com before proceeding.
• If your network drops after disabling NetworkManager, configure your interface manually in /etc/sysconfig/network-scripts/ifcfg-eth0.