Over the weekend, the website DNS Made Easy was subjected to a concentrated denial of service attack that peaked on Saturday at around 50Gbps. Currently, the identity of the attackers and their motivation remains unclear.
The attack, which lasted eight hours according to the firm, effectively shut-down the site for 1.5 hours. DNS Made Easy offers global IP Anycast enterprise DNS services.
A Twitter feed documenting the attacks is available here. The largest previously recorded DDoS attack was 49Gbps in 2009.