Denial-of-service attack

Crimean govt: Referendum website downed by cyber-attack from US

RT | March 16, 2014

The official website of the Crimean referendum is down due to a cyber-attack that originated from the US, Crimean authorities say.
The exact location from which the website’s servers were attacked was Illinois University, Crimean minister of information and mass communications Dmitry Polonsky told Itar-Tass news agency.