centos7 common firewall operations

1, firewall port operation

firewall-cmd --zone=public --add-port=80/tcp --permanent

80 open ports, open ports use a period (80-90) (- permanent permanent, this argument does not restart after failure)

firewall-cmd --reload

Reload

firewall-cmd --zone=public --list-ports

View all open ports (port verify whether open)

firewall-cmd --zone= public --remove-port=80/tcp --permanent

Delete open ports

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2, firewall common operation

systemctl start firewalld

Start firewall

systemctl stop firewalld

Turn off the firewall

systemctl status firewalld

Check firewall status

systemctl enable firewalld

Power On

systemctl disable firewalld

Disable boot