Dissertation
Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication network > General issues > Testing, operation

The Analysis and Control on Broadband Network Traffic

Author GuoAn
Tutor HeGang
School Beijing University of Posts and Telecommunications
Course Signal and Information Processing
Keywords Traffic Identification Flow Control netfilter DPI DFI
CLC TN915.06
Type Master's thesis
Year 2011
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With the rapid development of the Internet , management and control of network traffic for network applications , has become an important subject of research networks . Effective identification and management of network applications are not only enables network managers to keep abreast of the operational status of the network , and make timely adjustments to network problems and troubleshoot . In addition , the growing network of p2p traffic is rapidly engulfed the network bandwidth , we need to control this p2p traffic ; the rise of social networking , network easily filled with violence , reactionary remarks adverse information on the network content analysis is very urgent needs . But the great difficulty of this type of business are often transmitted through an encrypted , identify control deep packet inspection method commonly used is difficult to take effect, we need to use other means of identification for such traffic . This article describes a general message depth detection identification methods ; for encryption class traffic , Thunder and skype some behavioral characteristics on the basis of the business in the identification of a detailed analysis of a widely used linux firewall netfilter framework , and gives the application of this framework to identify the characteristics of general packet method then through netfilter comes nf_conntrack mechanism to achieve the identification of encrypted traffic characteristics , given a way to identify such traffic .

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