iptables 是与最新的 2.6.x 版本Linux 内核集成的 IP 信息包过滤系统。如果 Linux 系统连接到因特网或 LAN、服务器或连接 LAN 和因特网的代理服务器， 则该系统有利于在 Linux 系统上更好地控制 IP 信息包过滤和防火墙配置。 -iptables is integrated with the latest 2.6.x version of the Linux kernel IP packet filtering system. If the Linux system to connect to the Internet or LAN server or proxy server to connect the LAN and the Internet, the system is conducive to better control of the IP packet filtering and firewall configuration on Linux systems.