Nowadays, IP traceback against DoS ( Denial of Service) and DDOS ( Distributed Denial of Service) attacks becomes the most difficult problem in intemet security area. The aim of IP traceback system is to identify the source address in IP packets when the origin of a packet is spoofed. In this paper we compared a couple of most promising tracing techniques in order to find more effective methods. A new IP traceback system was proposed here, in which by using just one packet the tracing can be realized without victim packets.%DoS攻击(拒绝服务攻击)和DDoS攻击(分布式拒绝服务攻击)IP追踪目前成为当今网络安全领域中最难解决的问题,IP追踪系统目的是在数据包源地址非真时识别出IP数据包源地址.对一些解决该问题最有前景的追踪技术进行了比较,以寻找更有效方法,并提出了一个新的IP追踪系统,该系统能够只用一个数据包就可以实现追踪而不需要受害者数据包.
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