VoIP bezpečnostní prvek na bázi SIP Proxy Kamailio a Asterisk PBX

Abstract

Nowadays, implementing security policies is essential for all information systems connected to the Internet. VoIP systems are no exception. An insufficient level of security can lead to a significant financial loss. This thesis deals with the design of a security solution against the most common attacks on VoIP systems based on SIP protocol. To achieve this, two open source softwares are utilized, particularly Asterisk and Kamailio. First part of this thesis describes both Asterisk and Kamailio and their potential use. This knowledge is then used to determine their purpose in the final design. The main part is devoted to an implementation of these features and combining both softwares to work as one unit. In addition to the implementation of individual security mechanisms, the thesis also contains analysis of every feature and its advantages and possible shortcomings. The last part of this thesis is predominantly focused on benchmarking of the final solution.