sudo iptables -F
以下为正确方式:参考 http://www.open-open.com/lib/view/open1411818940031.html
卸载默认防火墙firewall,安装iptables
关闭firewall:
sudo systemctl stop firewalld.service #停止firewall sudo systemctl disable firewalld.service #禁止firewall开机启动
安装iptables防火墙
sudo yum install iptables-services #安装 sudo vim /etc/sysconfig/iptables #编辑防火墙配置文件
修改内容如下
# Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT # 开启80,3306 端口 [color=green]-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT[/color] -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT
:wq #保存退出
sudo systemctl restart iptables.service #最后重启防火墙使配置生效 sudo systemctl enable iptables.service #设置防火墙开机启动
reboot 即可。