LAUSR

Voice over Internet Protocol (VoIP) service is increasingly one of the most widespread applications since few decades. Data traffic of VoIP service faces various challenges and threats. The Session Initiation Protocol (SIP) flooding attack is one of the popular threats to this service. Flooding attack is the most severe attack as it is easy to generate and capture the networks and nodes that further lead to Denial of Service attack. Therefore, the performance analysis of SIP servers requires more focus. In this paper, effectiveness of SIP server under SIP flooding attack is evaluated using various message scenarios by setting up an experimental test bed. The stress testing of SIP server is carried out with CPU and memory utilization check. The quality of VoIP calls is measured in term of three quality metrics jitter, delay and packet loss. It is observed that with the increase of simultaneous calls, quality of VoIP calls degraded.