Linux(CentOS6.5) 开放端口，配置防火墙

打开配置文件
[code="命令"]# vi /etc/sysconfig/iptables [/code]
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 ACCEPT

[color=red][b]注意点：新开放的端口一定要在端口22后面[/b][/color]

重启防火墙使配置生效
[code="命令"]# /etc/init.d/iptables restart[/code]


其它
查看开放端口
[code="命令"]# /etc/init.d/iptables status[/code]
关闭防火墙
[code="命令"]# /etc/init.d/iptables stop[/code]