How to Start and Enable Firewalld on CentOS 7

Enable Firewalld

To enable firewalld, run the following command as root:

systemctl enable firewalld

Start Firewalld

To start firewalld, run the following command as root:

systemctl start firewalld

Check the Status of Firewalld

To check the status of firewalld, run the following command as root:

systemctl status firewalld