U.S. Government Protection against DDoS attack. In July 2009, the US. government faced the largest DDoS attack in its history, with the top-targeted site receiving nearly 8 years worth of traffic in one day. Despite the unprecedented scale of the attack, all of the US. government sites delivered via Akamai—including sites for the White House and 13 of the 15 Federal Cabinet level agencies—remained online, with Akamai absorbing more than 200 Gbps of attack traffic targeted at the government sites. At the same time, Akamai continued serving traffic to legitimate users and maintained a consistently high level of availability for its customers, delivering traffic at over 1 Tbps for the rest of its customer base.