GitHub, the most popular depository, faced the world’s most powerful DDoS attack of a whopping 1.3TB per second. As per GitHub, the website was unavailable for about 5 minutes (17:21 to 17:26 UTC) on February 28th as a result of this massive torrent of 1.2 Tbps traffic targetting the site all at once.
Soon after the attack, within about 10 minutes, GitHub sought help from Akamai Prolexic, which is a DDoS mitigation service. To block the malicious packets, Akamai routed all the traffic through its scrubbing centers.
Read more about the world biggest ever DDoS attack on GitHub on The Wired.