A Novel Method for P2P Traffic Identification

In order to cope with the challenges leaded by different protocols and varied port numbers, this paper comes up with an improvement approach for precise P2P (Peer-to-Peer) traffic identification which mainly focus on UDP (User Datagram Protocol) traffic produced by P2P software. Three significant features of UDP traffic with respect to transport layer behaviors and packet size distribution are revealed, including unique local port number, unique UDP protocol pair and two-point distribution of packet size. Experiments demonstrate that the identification accuracy of this approach is as high as 98.8% on average.