CentOS7关闭firewall防，使用iptables

1.关闭防火墙并且禁止开机启动 命令：systemctl stop firewalld.service 关闭防火墙 firewall-cmd --state 查看防火墙状态 systemctl disable firewalld.service 禁止开机启动 2.安装iptables 命令：yum install iptables yum install iptables-services 3.检

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