GitHub had a DDoS attack on February 28, 2018. The attack made github.com unavailable from 17:21 to 17:26 UTC and intermittently unavailable from 17:26 to 17:30 UTC. That is a total of 9 minutes.
To have a scale of the attack, it peaked at 1.35Tbps via 126.9 million packets per second. How many companies do you know that can migrate an attack of this magnitude in less than 10 minutes?
I think it’s quite an achievement, and this shows the good monitoring systems and fallback solutions that GitHub have in place for DDoS protection. Also, another interesting thing to mention is that everything was mitigated from a single command into their ChatOps.
It’s quite incredible and I’m confident they are going to reduce this failure time even less in the future. Have a look at the full incident report to better understand the scale of the attack and how they managed to fix it in such a short amount of time.