摘要： 分析了４种网上攻击（Ａｔｔａｃｋｓ）的原理和特点，提出了采用专业过滤器（Ｐｒｏｆｅｓｓｉｏｎａｌ　Ｆｉｌｔｅｒ．ＰＦ）保护内部网站点的策略。ＰＦ具有自身的安全性和复杂的过滤策略，能很好地防止外部攻击。同时，ＰＦ具有网络设备的特点，使网络的吞吐量得到了保证。

关键词: 专业过滤器, SYN－flooding, Ping－of－death, Net－ping－flooding, 服务拒绝

Abstract: Principle and characteristics of four attacks on the network are analyzed and a strategy protecting internal network by mean ofprofessional filter(PF) is addressed in this paper. PF can defend against attacks by self security and complex filtering policies. It guaranteesthe throughput of network due to its network device nature

中图分类号: 

• TP393.08