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由于Internet的迅速发展和网络应用的普及,防火墙技术普遍使用,本文通过论述防火墙所采用的三种基本技术,分析了各种技术的优缺点及防火墙在网络安全体系中发挥的作用。
Due to the rapid development of the Internet and the popularization of network applications, firewall technology is widely used. This paper analyzes the advantages and disadvantages of various technologies and the role of firewalls in the network security system by discussing the three basic techniques used in firewalls.