摘要： 文中给出了一种基于应用网关的防火场安全系统的设计与实现的方法．重点介绍了系统安全策略以及所采用的分组滤波，基于IP层的包加密这两种主要技术．

关键词: 分组滤波, 包加密, 防火墙, 应用网关, 网络安全技术

Abstract: The paper has advanced a method to design and realiz the security system based on application proxy firewall.It emphatically introduced security tactics, packet filter and packet encryption based on IP layer, which the system had used.

中图分类号: 

• TP393