Authored by Casper Manes
Considering the magnitude of the recent DDoS attack on Dyn, that
almost brought down the internet, all sysadmins must take action to
prevent their devices from taking part in future attacks.
As many of you might have noticed, at least from the news
headlines, a few weeks ago there was a huge internet outage that
impacted availability of dozens of major sites, including popular
ones like Twitter, Reddit, CNN, the Guardian, and many others. This was a
result from a devastatingly simple attack on one of the main
providers of core services underpinning of the Internet.
Dyn, one of the
major providers of DNS services on the Internet, with customers
ranging from end users to some of the most recognizable names on
the web, experienced what may prove to be the largest Distributed
Denial of Service (DDoS) attack in history, with a reported attack
strength of 1.2Tbps. While Dyn was the target, potentially millions
of people were victims.
