一、查看端口开放情况
二、开启端口
systemctl unmask firewalld.service #取消服务锁定
systemctl start firewalld.service
firewall-cmd —add-port=666/tcp —permanent 开启端口
firewall-cmd —reload 从新载入配置
firewall-cmd —query-port=666/tcp 查看是否开启成功
firewall-cmd —permanent —remove-port=666/tcp 移除端口
systemctl status firewalld 查看防火墙状态
systemctl start firewalld 开启防火墙
systemctl stop firewalld 关闭防火墙
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