【Centos】开放端口

启动: systemctl start firewalld

关闭: systemctl stop firewalld

查看状态: systemctl status firewalld

开机禁用 : systemctl disable firewalld

开机启用 : systemctl enable firewalld

重启:      firewall-cmd --reload

开放端口号:firewall-cmd --zone=public --add-port=3306/tcp --permanent

查看开放端口:firewall-cmd --list-all

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