centos7 關閉firewall安裝iptables並配置

1、配置防火牆，開啓80端口、3306端口

CentOS 7.0默認使用的是firewall做爲防火牆，這裏改成iptables防火牆。

一、關閉firewall：

systemctl stop firewalld.service #中止firewall

systemctl disable firewalld.service #禁止firewall開機啓動

  

二、安裝iptables防火牆

yum install iptables-services #安裝 

vi /etc/sysconfig/iptables #編輯防火牆配置文件 

# 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 #最後重啓防火牆使配置生效

systemctl enable iptables.service #設置防火牆開機啓動

 

2、關閉SELINUX 

vi /etc/selinux/config 

#SELINUX=enforcing #註釋掉

#SELINUXTYPE=targeted #註釋掉

SELINUX=disabled #增長 

:wq! #保存退出

setenforce 0 #使配置當即生效