How do I Load / Start RHEL / CentOS / Fedora Linux Iptables Firewall on Computer Boot?

To configure the iptables firewall to start automatically when the system boots on a Red Hat Enterprise Linux (RHEL), CentOS, or Fedora system, you can use the systemctl command to enable the iptables service. Here's the command you can use:

sudo systemctl enable iptables

This will configure the iptables service to start automatically at boot time.

If you want to start the iptables service immediately, you can use the following command:

sudo systemctl start iptables

Note: these commands assume that the iptables service is installed and configured to use systemd. If you are using a different init system (such as init.d or upstart), you may need to use different commands to control the iptables service.

It's also worth noting that you may need to use sudo to run these commands, depending on your system configuration and the privileges of your user account.

Finally, it's important to note that the iptables service is only one component of the firewall on a Linux system. Depending on your system and your firewall configuration, you may also need to configure other components of the firewall (such as the ip6tables or ebtables services) to start automatically at boot time.