Dyn states their problems were fixed at 17 UTC, but me and most other people in the Netherlands have been seeing issues for the whole evening. Something about their story does not add up...
Our Dyn account manager confirmed to us that issues were ongoing at 2:27pm ET.
In the caribbean there were issues up to 5 PM
The attack was not mitigated _at all_, attacker simply stopped. This post mortem is a big fat lie.