IP欺骗是利用主机之间的正常信任关系,伪造他人的IP地址达到欺骗某些主机的目的。IP地址欺骗只适用于那些通过IP地址实现访问控制的系统。实施IP欺骗攻击就能够有效地隐藏攻击者的身份。IP地址的盗用行为侵害了网络正常用户的合法权益,并且给网络安全、网络正常运行带来了巨大的负面影响,因此研究IP地址盗用问题,找到有效的防范措施,是当前的一个紧迫课题。 IP spoofing is the use of the normal trust between the host, fake other’s IP address to deceive some of the host’s purpose. IP address spoofing applies only to those systems that control access through IP addresses. IP spoofing attack can effectively hide the identity of the attacker. The fraudulent use of IP addresses violates the legitimate rights and interests of the normal users of the network and has a tremendous negative impact on the network security and the normal operation of the network. Therefore, it is an urgent issue to study IP address misappropriation and find effective precautionary measures.