Linux下设置防火墙（开启端口）

1、修改文件/etc/sysconfig/iptables

在文件中加入如下内容，目的是对外界开放7001端口
 -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 7001 -j ACCEPT

2、 重新加载iptables

[root@bogon sysconfig]# service iptables restart

 Flushing firewall rules: [ OK ]
Setting chains to policy ACCEPT: filter [ OK ]
Unloading iptables modules: [ OK ]
Applying iptables firewall rules: [ OK ]
Loading additional iptables modules: ip_conntrack_ftp [ OK ]
[root@bogon sysconfig]#