GitHub faced worst ever DDoS attack which caused shut down of site from 17:21 to 17:26 UTC on February 28. According to GitHub Engineering, the website maintained intermittent functionality between 17:26 and 17:30 before fully recovering.
This was a nine-minute attack, which is the longest faced by GitHub till today. This attack was more severe in terms of the sheer volume of data that was sent and caused the shutdown. At the peak of the attack, GitHub was flooded with data coming in at 1.35Tbps.
Responding to this attack, GitHub assured its clients that no data was compromised during the event. In response to the incident, GitHub said it has moved the affected facility's inbound traffic to Akamai.