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随着网络技术不断发展，使用防火墙系统解决分布式网络安全已成为必然需要。但是当前实现的 IP防火墙技术，都不具有灵活结构及好的伸缩性、扩展性，这就对 IP防火墙技术应用与实施提出了严峻挑战。文中提出新型的基于策略防火墙技术，通过灵活配置策略 IP网络中防火墙技术，使得防火墙系统具有灵活结构及好的伸缩性、扩展性，从而解决这一棘手问题。
With the continuous development of network technology, the use of firewall system to solve distributed network security has become an inevitable need. However, the IP firewall technology currently implemented does not have the flexible structure and good scalability and scalability. This poses a severe challenge to the application and implementation of the IP firewall technology. In this paper, a new type of policy-based firewall technology is proposed, which can solve this thorny problem by flexibly configuring the firewall technology in the IP network so that the firewall system has a flexible structure, good scalability and scalability.