To disable the firewall in Red Hat Enterprise Linux (RHEL) or CentOS, you can use the systemctl command. Here’s the basic syntax:
systemctl disable firewalld
This will disable the firewall service, so it won’t start when the system reboots. If you also want to stop the firewall service immediately, you can run the following command:
systemctl stop firewalld
Please note that disabling the firewall provides no protection for the system, so it should only be done in controlled and secure environments. Before disabling the firewall, consider alternative solutions, such as configuring the firewall to allow specific incoming traffic or creating more restrictive firewall rules.