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Spamhaus DDoS - FR

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Détail des différentes attaques de déni de services sur spamhaus.org observé sur le réseau CloudFlare.

Veröffentlicht in: Technologie
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Spamhaus DDoS - FR

  1. Spamhaus DDoS #while42 Sebastien Pahl Matthieu Tourne sebastien@cloudflare.com matthieu@cloudflare.com Friday, June 28, 13
  2. Spamhaus 2 Organisation internationale de lutte antispam • Maintient des listes d’adresse IP malveillantes • Utilisé par beaucoup d’entreprises et logiciels Friday, June 28, 13
  3. Pourquoi cette attaque? Spamhaus ajoute des IPs de clients de l’hébergeur hollandais “Cyberbunker” au listes. • Spamhaus demande a Cyberbunker de bloquer le spam • Refus de coopération • Cyberbunker accuse Spamhaus de jouer à la police du net 3 Friday, June 28, 13
  4. Cloudflare aide Spamhaus Pourquoi Cloudflare protège Spamhaus? • Cloudflare se veut neutre • Améliorer internet pour tout le monde 4 Friday, June 28, 13
  5. Utilisation de CloudFlare 5 CloudFlare Client Client Client Origin Friday, June 28, 13
  6. Réseau Cloudflare 6 Friday, June 28, 13
  7. Fonctionalitées 7 Caching Optimisation de contenu Sécurité Friday, June 28, 13
  8. Types d’attaques Layer 3/4 SMURF ACK Layer 7 DNS Amplification 8 Friday, June 28, 13
  9. DNS Amplification 9 Friday, June 28, 13
  10. DNS Amplification 10 Friday, June 28, 13
  11. DNS Amplification 11 Friday, June 28, 13
  12. This is the Internet 12 Friday, June 28, 13
  13. Breaking point - Attack #1 13 Spamhaus up, l’attaquant s’en prend à notre infrastructure. En pratique: • traceroute www.spamhaus.org, la dernière IP routable est notre point de connexion avec nos fournisseurs de BP. • 300 gbs de traffic == ouch. Friday, June 28, 13
  14. Breaking point - Attack #1 14 Friday, June 28, 13
  15. Breaking point - Mitigation #1 15 Mitigation avec nos “upstreams”: • Mitigation humaine (aka, téléphone) • Utilisation d’addresses non-routables (rfc 1918) • “Ingress filtering” (bcp-38) Friday, June 28, 13
  16. Breaking point - Attack #2 16 Friday, June 28, 13
  17. Breaking point - Mitigation #2 17 Internet Exchange Point ? Mitigation avec LINX (London Internet Exchange) : • Plus difficile (subnet partagé entre beaucoup de réseaux) • “Abandon” de LINX jusqu’à la fin de l’attaque. Friday, June 28, 13
  18. Leçons • Utilisation d’IP privées pour les interconnexions • Lutte contre les Récurseurs DNS ouverts • Exposition publique • Ingress filtering (bcp-38) • ... • 300 gbs, yeah right! 18 Friday, June 28, 13
  19. Questions ? Friday, June 28, 13

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