![firewall-cmd –add-port firewall-cmd –add-port](https://ebutlab.com/wp-content/uploads/2014/08/CentOS-Project2.png)
# firewall-cmd –list-service
dhcpv6-client http https ssh
# firewall-cmd –list-ports
# firewall-cmd –add-port=11122/tcp –zone=public –permanent
success
# firewall-cmd –reload
success
# firewall-cmd –list-service –zone=public
dhcpv6-client http https ssh