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安装防火墙:
yum install firewalld systemd -y

查看防火墙状态:
systemctl status firewalld 或 firewall-cmd --state

关闭防火墙:
systemctl stop firewalld 或

开启防火墙:
systemctl start firewalld

重启防火墙:
systemctl reload firewalld 或 firewall-cmd --reload

查看防火墙开机是否启动:
systemctl is-enabled firewalld

开机禁用防火墙:
systemctl disable firewalld

开放端口:
firewall-cmd --add-port=9300/tcp
永久开放端口:
firewall-cmd --add-port=9300/tcp --permanent

关闭端口:
firewall-cmd --remove-port=9300/tcp
永久关闭端口:
firewall-cmd --remove-port=9300/tcp --permanent

查看已经开放的端口:
firewall-cmd --list-ports

如果报错:FirewallD is not running 就是防火墙未开启

本文标签: 防火墙命令CENTOS