CentOS 7.x iptables防火墙配置,centosiptables

CentOS 7.x iptables防火墙配置,centosiptables

systemctl stop firewalld.service #停止firewall

systemctl disable firewalld.service

#禁止firewall开机启动 sudo yum install iptables-services

#安装iptables防火墙 sudo systemctl enable iptables

#设置iptables开机启动 vi /etc/sysconfig/iptables

#编辑防火墙配置文件 # 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

-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

-A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited

COMMIT :wq!

#保存退出 systemctl restart iptables.service

#最后重启防火墙使配置生效 systemctl enable iptables.service

#设置防火墙开机启动