Between January 25th and February 13th, 2004, Fourmilab was
subjected to an intensive Distributed Denial of Service (DDoS)
attack which pounded the site with around 400,000 hits per day
to the home page emanating from more than 16,000 different IP
addresses of sites worldwide. This may have been a
precursor or test version of the Mydoom worm prior to its mass
deployment. Here is the original incident report, updated
daily with forensic analysis as the attack burst, grew, and
eventually tailed off. It's back! On February 18th, 2004,
the attack resumed. Follow its progress in daily updates
(usually posted within an hour or so after 00:00 UTC) to the
above page.