Distributed Denial of Service Attacks

Editora:

KS OmniScriptum Publishing

Código:

491_9783639179521

Vendido e entregue por Um Livro

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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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