Avaliação de Proteção contra Ataques de Negação de Serviço Distribuídos (DDoS) utilizando Lista de IPs Confiáveis

  • Luis Oliveira UFPE
  • Rafael Aschoff UFPE
  • Bruno Lins UFPE
  • Eduardo Feitosa UFPE / UFAM
  • Djamel Sadok UFPE

Resumo


A severidade dos problemas causados por ataques DDoS e o aumento da freqüência e sofisticação dos mesmos têm contribuído para o surgimento de um grande número de mecanismos de defesa. Neste trabalho é proposto um sistema de detecção e prevenção de ataques DDoS baseado numa arquitetura modularizada. A idéia principal da solução consiste em manter uma tabela com o histórico de boas conexões já estabelecidas na rede, para que em situações de ataque essas sejam favorecidas com a maior parte da largura de banda disponível em detrimento de conexões desconhecidas e/ou de atacantes que serão limitadas por filtros. Os resultados dos testes demonstraram que a solução apresenta bom desempenho contra ataques DDoS massivos, grande escalabilidade e baixo consumo de recursos do sistema enquanto não prejudica o trafego legitimo.

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Publicado
27/08/2007
OLIVEIRA, Luis; ASCHOFF, Rafael; LINS, Bruno; FEITOSA, Eduardo; SADOK, Djamel. Avaliação de Proteção contra Ataques de Negação de Serviço Distribuídos (DDoS) utilizando Lista de IPs Confiáveis. In: SIMPÓSIO BRASILEIRO DE SEGURANÇA DA INFORMAÇÃO E DE SISTEMAS COMPUTACIONAIS (SBSEG), 7. , 2007, Rio de Janeiro. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2007 . p. 177-190. DOI: https://doi.org/10.5753/sbseg.2007.20926.

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