Detecting Ringing-Based DoS Attacks on VoIP Proxy Servers
Information Security Applications
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The VoIP technology has been increasingly popular and the number of its users has surged in the past years, because of its economical advantage over the traditional PSTN services. As a side effect, various VoIP servers and clients are becoming attractive targets of malicious attacks. This paper outlines the detection rules we have formulated to detect fuzzing attacks, which attempt to crash a VoIP device by sending it invalid SIP messages. This paper also proposes a system architecture that utilizes multi-core processors in order to scale up the performance of detection using these rules.