centos 7 방화벽 을 닫 고 iptables 를 설치 하고 설정 합 니 다.

 、     ，  80  、3306  
CentOS 7.0      firewall     ，    iptables   。
1、  firewall：
systemctl stop firewalld.service #  firewall
systemctl disable firewalld.service #  firewall    


2、  iptables   
yum install iptables-services #  
vi /etc/sysconfig/iptables #         
# 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! #    
systemctl restart iptables.service #            
systemctl enable iptables.service #         


 、  SELINUX
vi /etc/selinux/config
#SELINUX=enforcing #   
#SELINUXTYPE=targeted #   
SELINUX=disabled #  
:wq! #    
setenforce 0 #