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CentOS 7安装fail2ban+Firewalld防止SSH爆破与CC攻击 - Rat's Blog CentOS 7开放设置端口及firewall常用命令介绍 - Rat's Blog
CentOS 7出现Failed to start firewalld.service: Unit is masked的解决办法
博主: Rat's · 2017-10-31 · via Rat's Blog - firewall

说明:刚刚使用systemctl start firewalld命令开启防火墙的时候,却开不成功,出现Failed to start firewalld.service: Unit is masked的错误,经过搜索下后,发现是firewalld服务被锁定了,这里说下方法。

方法

执行命令,即可实现取消firewalld的锁定

systemctl unmask firewalld

解锁后,就可以再开启firewalld防火墙了。
请输入图片描述
再需要锁定firewalld时执行命令

systemctl mask firewalld

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