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研究生:蕭漢威
研究生(外文):Han-wei Hsiao
論文名稱:以資料探勘方法協助偵測網路服務不當使用之研究
論文名稱(外文):Network Service Misuse Detection: A Data Mining Approach
指導教授:魏志平魏志平引用關係
指導教授(外文):Chih-Ping Wei
學位類別:博士
校院名稱:國立中山大學
系所名稱:資訊管理學系研究所
學門:電算機學門
學類:電算機一般學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:英文
論文頁數:99
中文關鍵詞:網路流量分析地下 FTP 伺服程式偵測部份樣本空間分類分析網路服務不當使用偵測網路管理交互式後門程式偵測資料探勘
外文關鍵詞:Interactive Backdoor DetectionUnderground FTP Server DetectionClassification with Partial Training SpaceNetwork ManagementNetwork Service Misuse DetectionNetwork Traffic AnalysisData Mining
相關次數:
  • 被引用被引用:9
  • 點閱點閱:363
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  • 下載下載:71
  • 收藏至我的研究室書目清單書目收藏:0
網際網路應用的蓬勃發展,促成了各式網路服務的興起與廣泛使用,除了加強網路管理的工作維護一個穩定而安全的網路環境之外,因為網路使用者不當使用網路服務的行為而造成影響,也成為現今網路管理必須面對的重要挑戰。所謂的網路上不當使用網路服務的意義是指網路上的使用者以濫用、不合道德使用、未經授權使用或是違法使用網路服務。而這些不當使用行為經常會刻意躲避網路管理者的監視,以隱匿的方式進行其不當的使用行為。基於偵測網路服務不當使用的重要性,我們發展了以路由器的網路流量資料做為基礎的網路不當使用的偵測技術。並且在本研究中我們提出了互助式(Cross-Training)的分類學習方法,從路由器的流量資料中建立了網路服務類別的分類預測模式,藉以偵測地下 FTP 伺服程式以及交互式網路後門程式(Interactive Backdoors)兩項網路服務不當使用的問題。
在我們的評估驗證中,互助式的分類學習方法(特別是 NN -> C4.5)的分類預測結果要比傳統分類分析的方法(C4.5、倒傳式類神經網以及貝氏分類法)來的優秀,並且我們在實際網路的實證評估中,偵測地下 FTP 伺服程式系統(以互助式的分類學習方法 NN -> C4.5)可以達到 95% 的召回率(Recall Rate)以及 34%的準確率(Precision Rate)。在交互式網路後門程式偵測的預測方面,我們於實際網路上真實的找出了數個高懷疑度的交互式網路後門程式。
As network services progressively become essential communication and information delivery mechanisms of business operations and individuals’ activities, a challenging network management issue emerges: network service misuse. Network service misuse is formally defined as “abuses or unethical, surreptitious, unauthorized, or illegal uses of network services by those who attempt to mask their uses or presence that evade the management and monitoring of network or system administrators.” Misuses of network services would inappropriately use resources of network service providers (i.e., server machines), compromise the confidentiality of information maintained in network service providers, and/or prevent other users from using the network normally and securely. Motivated by importance of network service misuse detection, we attempt to exploit the use of router-based network traffic data for facilitating the detection of network service misuses. Specifically, in this thesis study, we propose a cross-training method for learning and predicting network service types from router-based network traffic data. In addition, we also propose two network service misuse detection systems for detecting underground FTP servers and interactive backdoors, respectively.

Our evaluations suggest that the proposed cross-training method (specifically, NN->C4.5) outperforms traditional classification analysis techniques (namely C4.5, backpropagation neural network, and Naïve Bayes classifier). In addition, our empirical evaluation conducted in a real-world setting suggests that the proposed underground FTP server detection system could effectively identify underground FTP servers, achieving a recall rate of 95% and a precision rate of 34% (by the NN->C4.5 cross-training technique). Moreover, our empirical evaluation also suggests that the proposed interactive backdoor detection system have the capability in capturing “true” (or more precisely, highly suspicious) interactive backdoors existing in a real-world network environment.
Chapter 1 Introduction 4
1.1 Background 5
1.2 Definition of Network Service Misuse 7
1.3 Research Motivation 8
1.4 Research Objectives 10
1.5 Organization of the Dissertation 12
Chapter 2 Literature Review and Formulation of Research Questions 14
2.1 Literature Review 14
2.2 Research Framework 18
2.3 Research Questions 20
Chapter 3 Aggregation of Network Traffic Data and Network Server Identification 22
3.1 Format and Characteristics of NetFlow Traffic Data 22
3.2 Network Environment Concerning in This Study 24
3.3 Network Server Identification 26
3.4 Aggregation of Network Traffic Data 27
Chapter 4 Classification with Partial Training Space: Technique Development and Empirical Evaluations 33
4.1 Definition 33
4.2 Cross-Training Method for Classification with Partial Training Space 41
4.2.1 Traditional Classification Analysis Techniques 41
4.2.2 Learning Bias of Traditional Classification Analysis Techniques 45
4.2.3 Design Principle of Cross-Training Method 47
4.2.4 Process and Algorithmic Details of Cross-Training Method 50
4.3 Empirical Evaluations of the Proposed Cross-Training Method 53
4.3.1 Data Collection 54
4.3.2 Evaluation Design 56
4.3.3 Benchmark Techniques and Specific Cross-training Techniques 58
4.3.4 Evaluation Result for FTP Service Prediction Task 61
4.3.5 Data Size Sensitivity Analysis for FTP Service Prediction Task 65
4.3.6 Evaluation Result for Interactive Service Prediction Task 69
4.3.7 Data Size Sensitivity Analysis for Interactive Service Prediction Task 73
Chapter 5 Empirical Evaluations of Network Service Misuse Detection Systems 78
5.1 Underground FTP Server Detection System 78
5.2 Interactive Backdoor Detection System 80
5.3 Empirical Evaluations of the Proposed Detection Systems 83
5.3.1 Data Collection 83
5.3.2 Evaluation Criteria 84
5.3.3 Evaluation Results of Underground FTP Server Detection System 87
5.3.4 Evaluation Results of Interactive Backdoor Detection System 89
5.3.5 Limitations of Our Empirical Evaluations 91
Chapter 6 Conclusion and Future Research Directions 93
References 97
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