The paper describes the vulnerability of SIP servers to
DoS attacks and methods for server protection. For each attack, this
paper describes their impact on a SIP server, evaluation of the threat
and the way in which they are executed. Attacks are described in
detail, and a security precaution is made to prevent each of them. The
proposed solution of the protection is based on a specific topology of
an intrusion protection systems components consisting of a
combination of Snort, SnortSam and Iptables applications, the
solution was verified in experiments. The contribution of this paper
includes the performed comparison of the DoS attacks’ efficiency
which were tested both without any protection and then with
implemented Snort and SnortSam applications as proposed in our
solution.Scopus6118417
