CentOS7
systemctl stop firewalld 停止防火墙
systemctl start firewalld 启动防火墙
systemctl disable firewalld 禁止防火墙开机启动
systemctl enable firewalld 禁止防火墙开机启动
systemctl status firewalld 查看防火墙状态
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CentOS6
service iptable status —查看防火墙状态
servcie iptables stop --临时关闭防火墙
service iptables start --临时启动防火墙
service iptables restart --重启防火墙
chkconfig iptables off --永久关闭防火墙
chkconfig iptables on --永久开启防火墙