To disable the firewall on Red Hat Enterprise Linux (RHEL) or CentOS, you can use the following command:
sudo systemctl disable firewalld
This will disable the firewalld service, which is the default firewall management tool on RHEL and CentOS.
Note: Disabling the firewall can leave your system vulnerable to security threats, so it is generally not recommended to do so unless you have a specific reason for doing so. If you only want to temporarily stop the firewall, you can use the following command instead:
sudo systemctl stop firewalld
This will stop the firewalld service, but it will start again when the system is restarted. If you want to permanently disable the firewall, you should use the disable
command as shown above.
If you want to enable the firewall again, you can use the following command:
sudo systemctl enable firewalld
This will enable the firewalld service and start it if it is not already running.