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防火墙技术是解决网络安全问题的一种有效手段。本文给出了一种混合型防火墙的设计与实现方法，将分组过滤技术与应用网关技术结合起来，加入用户身份确认和数据加密等机制，形成一种高效、通用、更加安全的混合型防火墙结构。实践证明这种方法具有较好的性能／价格比。
Firewall technology is an effective way to solve network security problems. This paper presents a hybrid firewall design and implementation method, the packet filtering technology and application gateway technology combine to join the user authentication and data encryption mechanisms to form a highly efficient, universal, more secure hybrid firewall architecture . Practice has proved that this method has better performance / price ratio.