VoIP Denial of service attacks classification and implementation

Voice over Internet Protocol (VoIP) is the newest and the fastest growing technology which consists of routing voice conversations over IP-based network. The flexibility of the VoIP system and the convergence of voice and data networks brings with it additional security requirements, VoIP availability is the most important one. Denial-of-service (DoS) attacks are the main concerns with regard to causing loss of VoIP availability. Its impact ranges from mild service degradation to complete loss of service. In order to avoid this type of attack and discover its security vulnerabilities, it is important to be aware of attack's mechanisms and have a good understanding of their impacts. The main contribution of this paper is to present VoIP DoS attacks' classes, identify common ones in each class, and to implement a test bed to generate, analyze and measure the impact of VoIP flooding attacks.