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Research and Realize of Network Monitoring Based on Data Packet Capture

Author: ZhangHaiYan
Tutor: ZhangLaiShun
School: PLA Information Engineering University
Course: Computer technology
Keywords: Packet capture Winpcap Protocol analysis Packet filtering Network sniffer
CLC: TP393.08
Type: Master's thesis
Year: 2009
Downloads: 117
Quote: 0
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Abstract


With the rapid development and popularization of network technology , the network , while convenient for people to study and work for us due to network -dependent enhancement - network information security . Indeed, the computer violations of people's lives more and more inseparable from the computer at the same time China's annual increase in the speed of up to 30% . Tested at the same time the face of network security issues , there is an urgent need to develop to be able to analyze , diagnose , test network performance and security tools , these tools can be effective network monitoring , better health network created environment. In this paper, the concepts and basic methods of network packets and packet capture WINPCAP the architecture , packet capture driver mechanism , in-depth study of the basic principles of protocol analysis and filtering , packet capture - based network monitoring system is designed and implemented . The main work includes: 1 . The WinPcap system structure , packet capture drive mechanism , in-depth study of the basic principles of protocol analysis and filtering , and use Winpcap experimental research network packet capture and filtering . 2 from different angles , respectively , proposed a way to improve overall system performance . First optimize Winpcap performance multi-threaded, the appropriate size of the kernel and user cache , strict filter conditions in the study have been three modes ; followed in order to improve the efficiency of protocol analysis , matching algorithm conditions , improved mode matching algorithm ; finally read and write buffer technology , multi-threaded processing technology to improve the processing capacity of the system . Design and development of network monitoring system of the various functional modules of the system detailed design and implementation process , and on the design of the monitoring system has been tested in the LAN , the test results are given .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Computer Network Security
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