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

Linux(CentOS6.5) 开放端口，配置防火墙