If you were online over the weekend, you might have noticed that people in the United States and Europe complained that some sites were gone from the internet.
Some of the most popular sites in the world, like the BBC, The Guardian, CNN, Twitter, AirBnB, SoundCloud, and many others were affected by an attack that went beyond anything else in the past, and which silenced a large part of the world wide web.
It was another massive denial of service attack that bombarded internet servers with large amounts of junk queries and responses that tied up network capacity and system resources that caused the outage.
This time the attack was different as it focused on Dyn, a company that runs managed domain name system (DNS) services for large sites around the world.
DNS is the internet directory that translates a numeric network address like 203.99.67.67 to nzherald.co.nz.
When the DNS dies, so does the web which is the internet for the vast majority of people.