Centos 7 Firwall Staus, Enable, Disable, Start

Check the Status of Firewalld
Run the following command as root:
systemctl status firewalld

Stop Firewalld
To stop firewalld, run the following command as root:
systemctl stop firewalld
Disable Firewalld
To disable firewalld, run the following command as root:
systemctl disable firewalld

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