International forum of researchers Students and Academician
In security infrastructure, the unauthorized user detection system plays an important role. Denial of Service attack (DoS) brings a very serious threat to send to the stability of the Internet. Here the authors analyze the DoS attack detection methods are mostly focused on data mining techniques. Some DoS attacks are too complex for today's firewalls, e.g. if there is an attack on port 80 (web service), firewalls cannot prevent that attack because they cannot distinguish good traffic from DoS attack traffic. Popular web sites such as Yahoo, CNN, and Amazon, are among the well-known victims of DoS attacks.