1.查看防火墙状态

    firewall-cmd —state

    running代表防火墙正在运行中,如果防火墙处在关闭状态,则运行下面命令开启防火墙

    systemctl start firewalld.service

    2.查看某个端口是否放行

    firewall-cmd —query-port=端口号/tcp

    3.放行指定端口

    firewall-cmd —zone=public —add-port=指定端口号/tcp —permanent

    3.1.重启防火墙

    systemctl restart firewalld.service

    3.2 重新载入配置

    3.3 关闭防火墙

    systemctl stop firewalld
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    ](https://blog.csdn.net/weixin_44916305/article/details/118355953)