CentOS 7默认使用的防火墙为firewalld
启动防火墙
systemctl start firewalld.service
停止防火墙
systemctl stop firewalld.service
禁用firewalld
systemctl disable firewalld.service
装iptables
yum install iptables-services -y
启用并启动iptables
systemctl enable iptables systemctl start iptables
编辑ipatbles的规则
vi /etc/sysconfig/iptables
重启iptables服务
service iptables restart