The definition of IP spoofing is introduced and the attacking method is analyzed in this paper. Besides, the comprehensive defending strategy is provided to protect WEB site.

• 介绍IP电子欺骗的涵义,并剖析其攻击方法和手段,在分析其所造成的危害基础上,提出保护WEB站点,抵御其"入侵"的综合防御策略。