CentOS 7 默认的防火墙是firewall
关闭firewall使用iptables:
关闭firewall:
[root@localhost ~]# systemctl stop firewalld.service //停止firewall
[root@localhost ~]# systemctl disable firewalld.service //禁止firewall开机启动
安装iptables:
[root@localhost ~]# yum -y install iptables-services //注意是services
开启iptables:
[root@localhost ~]# systemctl restart iptables.service //最后重启防火墙使配置生效
[root@localhost ~]# systemctl enable iptables.service //设置防火墙开机启动
保存规则:
[root@localhost ~]# service iptables save //第一种方法
[root@localhost ~]# iptables-save > /etc/sysconfig/iptables //第二种方法