Linux(CentOS6.5)开放端口，配置防火墙

1. 打开配置文件

[root@localhost ~]# vi /etc/sysconfig/iptables

2. 正确的配置文件

# 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 -j REJECT –reject-with icmp-host-prohibited 
-A FORWARD -j REJECT –reject-with icmp-host-prohibited 
COMMIT

-A INPUT -m state –state NEW -m tcp -p tcp –dport * -j AC

3. 新开启的端口 一定要在22端口的后面写

重启防火墙  使配置生效

[root@localhost ~]# /etc/init.d/iptables restart





查看开放的端口

[root@localhost ~]# /etc/init.d/iptables status

 关闭防火墙

[root@localhost ~]# /etc/init.d/iptables stop