RIM: Router Interface Marking for IP Traceback

Distributed Denial-of-Service (DDoS) attacks have become a major threat to the Internet. As a countermeasure against DDoS attacks, IP traceback schemes identify the network paths the attack traffic traverses. This paper presents a novel IP traceback scheme called Router Interface Marking (RIM). In RIM, a router probabilistically marks packets with a router interface's identifier. After collecting the packets marked by each router in an attack path, a victim machine can use the information in the marked packets to trace back to the attack source. Different from most existing IP traceback schemes, RIM marks packets with the information of router interfaces rather than that of router IP addresses.