信息安全--防火墙的应用研究

本从信息安全的检测的角度论述了如何利用防火墙来达到维护网络安全的目的。在中，给出了防火墙的概念，以及常见三类防火墙技术：基于包过滤的防火墙、基于代理的防火墙和基于状态检测的防火墙等。详细描述了各类型防火墙主要技术特征，以及各种防火墙技术的优缺点并指出了今后防火墙的发展趋势。

The Security of Information--Application Research on Firewall

With the rapid development of computer technology, the network has changed our life a lot and advanced the society's development. Benefiting from the network, we can not ignore the hiding security troubles.After we save all kinds of schemes, bargains and exams to the computer, anyone may use the computer to read these information, so it may betray the secret. From the point of view of detecting the security of information, I try to state how to use the firewall to protect the security of network. In my paper, I explain the conception of firewall and the three familiar firewall technologies: packet - filtering firewall, proxy firewall and state detecting firewall. And describe their main technological characters , the advantages and the disadvantages Finally I point out the development trend of the firewall.