Distributed Denial of Service Attacks » książka
Distributed Denial of Service Attacks
ISBN-13: 9783639179521 / Angielski / Miękka / 2009 / 88 str.
Distributed Denial of Service (DDoS) attacks are attempts to overwhelm a computer system in order to deny access by legitimate users. They are generally unstoppable, but there is a good deal of on-going research on methods to reduce their negative effects. This paper will deal with the design of a model that simulates such an attack. The simulation model is then used to study possible ways to defend against these attacks. Three experiments are run: 1) using a priority queue to sort messages from clients based on how many connections they have open on the server; 2) limiting the number of connections each client can create; and 3) having the server forcefully delete the oldest established connection, whenever its connection table becomes full. Results show that method 1 is totally ineffective while method 2 somewhat improves the overall performance of the system. However, method 3, combined with method 2, produces significantly improved performance against a DDoS attack.
Distributed Denial of Service (DDoS) attacks areattempts to overwhelm a computer system in order todeny access by legitimate users. They are generallyunstoppable, but there is a good deal of on-goingresearch on methods to reduce their negative effects.This paper will deal with the design of a model thatsimulates such an attack. The simulation model isthen used to study possible ways to defend againstthese attacks. Three experiments are run: 1) using apriority queue to sort messages from clients based onhow many connections they have open on the server; 2)limiting the number of connections each client cancreate; and 3) having the server forcefully deletethe oldest established connection, whenever itsconnection table becomes full. Results show thatmethod 1 is totally ineffective while method 2somewhat improves the overall performance of thesystem. However, method 3, combined with method 2,produces significantly improved performance against aDDoS attack.
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