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

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