centos7 关闭firewall安装iptables并配置

1、配置防火墙，开启80端口、3306端口

CentOS 7.0默认使用的是firewall做为防火墙，这里改成iptables防火墙。

一、关闭firewall：

systemctl stop firewalld.service #中止firewall

systemctl disable firewalld.service #禁止firewall开机启动

  

二、安装iptables防火墙

yum install iptables-services #安装 

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

 

2、关闭SELINUX 

vi /etc/selinux/config 

#SELINUX=enforcing #注释掉

#SELINUXTYPE=targeted #注释掉

SELINUX=disabled #增长 

:wq! #保存退出

setenforce 0 #使配置当即生效