firewall centos 7 code example

Example 1: firewall-cmd add port 8080

sudo firewall-cmd --zone=public --permanent --add-port=5000/tcp
sudo firewall-cmd --zone=public --permanent --add-port=4990-4999/udp
sudo firewall-cmd --zone=public --permanent --list-ports

Example 2: install firewall-cmd centos 7

sudo yum install firewalld
sudo systemctl enable firewalld
sudo reboot

Example 3: is firewall running centos 7

systemctl status firewalld