路由器是Intranet和Internet的连接处,是信息出入的必经之路,对网络的安全具有极其重要的地位。同时,路由器配置的优劣,对于企业内部网如何更快、更好地访问Internet具有决定性的作用。本文就是假设在没有安装网络防火墙的情况下,充分发挥路由器的作用,提高网络的安全性。另外,鉴于Cisco系列路由器在我国的广泛使用,本文均以Cisco路由器作为配置的例子。 Routers are Intranet and Internet connections, access to information is the only way for network security has an extremely important position. At the same time, the pros and cons of router configuration, for the enterprise intranet how to get faster, better access to the Internet has a decisive role. This article assumes that without installing a network firewall, give full play to the role of the router to improve network security. In addition, in view of the widespread use of Cisco Series Routers in our country, this document uses Cisco routers as an example of configuration.