防火墙作为网络安全基础设施的主流产品,近年来一直是信息安全领域中研发的热点。随着网络带宽的增长和千兆网络的大规模推广应用,以及NP、ASIC等技术的迅速发展,防火墙技术一方面向高速发展,一方面不断延伸新的功能,以适应国家信息化建设,特别是电子政务、电子商务和企业信息 As a mainstream product of network security infrastructure, firewall has been a hot spot in the field of information security in recent years. With the increase of network bandwidth and the large-scale popularization and application of gigabit network, as well as the rapid development of technologies such as NP and ASIC, on the one hand, firewall technology has been developing at a high speed. On the other hand, it continuously extends new functions to adapt to the national informatization construction, Is e-government, e-commerce and business information