Exploit codes based on system vulnerabilities are often used by attackers to attack target computers or services. Such exploit programs often send attack packets in the first few packets right after a connection established with the target machine or service. And such attacks are often launched via Telnet service as well. A lightweight network-based intrusion detection system is proposed on detecting such attacks on Telnet traffic.
The proposed system filters the first a few packets after each Telnet connection established and only uses partial data of a packet rather than total of it to detect intrusion, i.e. such design makes system load reduced a lot. This research is anomaly detection. The proposed system characterizes the normal traffic behavior and constructs it as a normal model based on the filtered normal traffic. In detection phase, the system examines the deviation of current filtered packet from the normal model via an anomaly score function, i.e. a more deviate packet will receive a higher anomaly score. Finally, we use 1999 DARPA Intrusion Detection Evaluation Data Set which contains 5 days of training data and 10 days of testing data, and 44 attack instances of 16 types of attacks, to evaluate our proposed system. The proposed system has the detection rate of 73% under a low false alarm rate of 2 false alarms per day; 80% for the hard detected attacks which are poorly detected in 1999 DARPA IDEP.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0726105-140441 |
| Date | 26 July 2005 |
| Creators | Chen, Ya-lin |
| Contributors | Te-hsin Hsieh, Chia-mei Chen, Jinn-shing Cheng, Bing-chiang Jeng |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0726105-140441 |
| Rights | unrestricted, Copyright information available at source archive |
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