TAG | dns
On October 21st, a large number of websites, including some of the biggest names, were knocked off the Internet by a massive distributed denial-of-service (DDoS) attack. A DDoS attack occurs when thousands to millions of devices send traffic to a target, completely overloading its servers or Internet connection.
Bruce Schneier on the real world effectiveness of a very simple domain name based man in the middle attack.
Here is a Wired article on the same issue showing how it was used to steal 20 GB of email from a Fortune 500 company.