Research On Countermeasures To Denial Of Service Attack And IP Traceback

With the development of network technology and application, network security becomes increasingly more important. Denial of service attack is among the hardest security problems to address because it is easy to launch, difficult to defend and trace. So, doing research on DoS attack and its countermeasures is not only challenging but also very important.We research amply on the denial of service attack, and get along with the source traceback.In this paper, the mechanism, methods of and countermeasures to denial of services attacks are discussed. And several representative tools about denial of services are analyzed in this paper. After that, we research and ameliorate the basic packet marking scheme presented by Savage. Several packet marking schemes for traceback are reviewed and some improvements to the basic packet marking scheme are given, which reduce the workload and the number of packet required in the attack tree reconstruction.