Denial-of-Service(DoS) Attacks

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DDoS attack defense mechanism – intrusion detection • Prevention is the utmost required way. Detection is the second line. – Anomaly detection – Misuse detection • Even detection is not easy – Degradation of performance is not only from DoS attack
DDoS attack defense mechanism – intrusion response • IP traceback – IP traceback traces the attacks back to their origin, so one can find the true identity of the attacker and achieve detection of asymmetric routes as well as path characterization. – ICMP traceback, link-testing traceback, probabilistic packet marking (PPM), hash-based IP traceback, Sleepy Traceback, and CenterTrack • Traffic pattern analysis – During a DDoS attack, traffic pattern data can be stored and then analyzed after the attack in order to find specific characteristics and features that may indicate an attack • Analysis of event logs – The selection of event logs recorded during the setup and the execution of the attack can be used to discover the type of DDoS attacks and do a forensic analysis. – Log sources: Network equipment such as firewalls, packet sniffers, server logs, and honeypots
Page 1 and 2: IMS584 (네트워크보안) Redbook
Page 3 and 4: DoS attack examples - the old types
Page 5 and 6: DoS attack examples - SYN flooding
Page 7 and 8: DoS attack examples - SYN flooding
Page 9 and 10: DoS attack example - application le
Page 11 and 12: DoS attack examples - LAND attack
Page 13 and 14: DoS attack example - local resource
Page 15 and 16: Types of DoS attack (from textbook-
Page 17 and 18: DoS Defense problems (cont’) •
Page 19 and 20: DDoS attack example - the old type
Page 21 and 22: DDoS attack example - the old type
Page 23 and 24: DDoS attack procedures • 1. selec
Page 25 and 26: DDoS attack categories - degree of
Page 27 and 28: DDoS attack categories - amplificat
Page 29 and 30: DDoS attack categories - Attack Rat
Page 31 and 32: 현재의 DDoS 공격 방식과 과
Page 33 and 34: DDoS attack defense mechanism • F
Page 35: DDoS attack defense mechanism - int
Page 39 and 40: Consensus Roadmap for Defeating Dis
Page 41 and 42: Reference sites for writing your pa
Page 44 and 45: BOT, BOTNET • 봇(Bot) : 사용
Page 46 and 47: 왜 BOTNET 이 위험한가 • BOT
Page 48 and 49: 아이템베이 공격 사례 •
Page 50 and 51: BOTNET 의 유형 • 중앙집중
Page 52 and 53: BOTNET 의 유형 진화 • 다수
Page 54 and 55: BOTNET 간 전쟁 • 전통 봇넷
Page 56: References • www.botnet.co.kr •

Denial-of-Service(DoS) Attacks

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