sudo systemctl status firewalld
sudo systemctl enable firewalld
sudo systemctl unmask --now firewalld
sudo systemctl enable firewalld
sudo systemctl start firewalld
sudo systemctl status firewalld
sudo firewall-cmd --get-zones
sudo firewall-cmd --get-default-zone
sudo firewall-cmd --get-active-zones
sudo firewall-cmd --list-all
sudo firewall-cmd --zone=work --list-all
sudo firewall-cmd --zone=home --change-interface=eth1
firewall-cmd --get-active-zones
sudo firewall-cmd --set-default-zone=work
sudo firewall-cmd --get-default-zone