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Distributed denial-of-service (DDoS) attacks are, by nature, large-scale. Companies like
Cloudflare make a significant amount of money offering services to combat DDoS
attacks. As stated in a Cloudflare blog (1),On Monday, March 18, 2013 Spam Haus
contacted Cloudflare regarding an attack they were seeing against their
website"spamhaus.org. They signed up for Cloudflare and we quickly mitigated the
attack. The attack, initially, was approximately 10Gbps generated largely from open DNS
recursors. On March 19, the attack increased in size, peaking at approximately 90Gbps.
The attack fluctuated between 90Gbps and 30Gbps until 01:15 UTC on March 21.
