Research Of Network Traffic Identification On Key Technologies

With the rapid development of the Internet Network and the hardware production process ever-changing,network application services are diversification.Especially,the mobile terminal becomes more and more popularity,the application services on it becomes more and more.That brings some difficulties to the network monitoring,and also to the network load.Apart from that,it’s hard for the operator to manage the network traffic.Though,better regulation of network traffic and network bandwidth pressure as low as possible,which is so important that we should distinguish the applications on the Internet,especially the P2P traffic identification.According to the problems which the Internet network faces,this paper starting from the refinement recognition and real-time identification,and doing some researches to get the target ofhigh-performance traffic identification.After analyzing and summarizing the previous existing traffic identification technology,we combine the DPI(Deep Packet Inspection)with DFI(Deep Flow Inspection),and propose a method for the identification of the Mobile Internet network services.Firstly,we capture some services packets which are popular on the mobile terminal and based on the 80-port.Then obtaining some data and extracting some features,we propose a refinement recognition algorithm about HTTP based on DPI.And for the P2P streaming applications which encrypted transmission data using UDP protocol,we propose a recognition algorithm which improved and based on R~2TC.At last,we implement a set of network traffic identification system that can support both online and offline service identification,and which based on pattern matching algorithm and behavior-based protocol identification.After a serial of experiments and performance testing,the system can meet the accuracy and real-time of protocol identification in high-speed network.