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| $ systemctl start firewalld
$ systemctl stop firewalld
$ systemctl restart firewalld
$ systemctl status firewalld
$ systemctl disable firewalld $ systemctl enable firewalld
$ firewall-cmd --reload
$ firewall-cmd --state
$ firewall-cmd --list-all
$ firewall-cmd --list-services
$ firewall-cmd --get-services
$ firewall-cmd --add-service=<service name> $ firewall-cmd --remove-service=<service name>
$ firewall-cmd --permanent --add-port=<port>/<protocol> $ firewall-cmd --permanent --remove-port=<port>/<protocol> $ firewall-cmd --reload $ firewall-cmd --list-ports
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