Fortune: The attack was a success, crippling the websites of major companies like Amazon, Netflix and Twitter for hours at a time. by Jeff John Roberts via Data Sheet
'We now have a handle on what happened: Hackers used publicly available source code to assemble a bot-net army of internet-enabled devices, and then directed those devices to send massive waves of junk requests to a DNS provider. The attack meant the provider, New Hampshire based Dyn, could not carry out its job of acting as a switchboard for the internet, and consumers could no longer reach popular websites.
'The compromised devices, which make up the bot-net army, are still out there and unpatched, which means other attacks are likely on the way. This makes it a good time to ask who’s to blame for this debacle. We can start, of course, by fingering the hackers themselves, who appear to have unleashed the attack with profit motives in mind.'