University of Thai Chamber of Commerce
Session Initiation Protocol is a core protocol for coming real time communication networks, including VoIP, IMS and IPTV networks. Based on the open IP stack, it is similarly susceptible to Denial-of-Service (DoS) attacks launched against SIP servers. More than 20 different research works have been published to address SIP-related DoS problems. In this paper, the authors explain three different types of DoS attacks on SIP networks, called SIP message payload tampering, SIP message flow tampering and SIP message flooding. They survey different approaches to counter these three types of attacks.