A VoIP Traffic Monitoring System Based on NetFlow v9

With the development of VoIP (Voice over IP) service, new security threats are expected to be appeared. However, existing IP network security solutions cannot detect new VoIP specified network threats because they cannot reflect characteristics of VoIP. This paper proposes a novel system that can monitor VoIP service and detect VoIP network threats practically. The proposed system collects attributes of VoIP traffic based on NetFlow, and executes monitoring and detecting based on statistic and behavior.