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Defending against flooding-based distributed denial-of-service attacks: a tutorial

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1 Author(s)
Chang, R.K.C. ; Hong Kong Polytech. Univ., Kowloon, China

Flooding-based distributed denial-of-service (DDoS) attack presents a very serious threat to the stability of the Internet. In a typical DDoS attack, a large number of compromised hosts are amassed to send useless packets to jam a victim, or its Internet connection, or both. In the last two years, it was discovered that DDoS attack methods and tools are becoming more sophisticated, effective, and also more difficult to trace to the real attackers. On the defense side, current technologies are still unable to withstand large-scale attacks. The main purpose of this article is therefore twofold. The first one is to describe various DDoS attack methods, and to present a systematic review and evaluation of the existing defense mechanisms. The second is to discuss a longer-term solution, dubbed the Internet-firewall approach, that attempts to intercept attack packets in the Internet core, well before reaching the victim.

Published in:

Communications Magazine, IEEE  (Volume:40 ,  Issue: 10 )