centos7、centos6防火墙的配置

centos7 1.查看防火墙命令 firewall-cmd --state systemctl status firewalld 2.开启防火墙 3.关闭防火墙 4.设置防火墙开机启动  systemctl enable firewalld 5.设置防火墙开机禁止启动 systemctl disable firewalld 补充说明：systemctl systemctl是CentOS7的服务管

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