firewall-cmd

The firewalld command line client.

View the available firewall zones:

firewall-cmd --get-active-zones

View the rules which are currently applied:

firewall-cmd --list-all

Permanently open the port for a service in the specified zone (like port 443 when in the public zone):

firewall-cmd --permanent --zone={{public}} --add-service={{https}}

Permanently close the port for a service in the specified zone (like port 80 when in the public zone):

firewall-cmd --permanent --zone={{public}} --remove-service={{http}}

Reload firewalld to force rule changes to take effect:

firewall-cmd --reload