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Distributed denial of service attacks on root
nameservers are Internet events in which distributed denial-of-service attacks
target one or more of the thirteen Domain Name System root
nameservers. The root nameservers are critical infrastructure
components of the Internet, mapping domain names to Internet
Protocol (IP) addresses and other information. Attacks against
the root nameservers can impact operation of the entire Internet,
rather than specific websites.
Attacks
October 21,
2002
On October 21, 2002 an attack lasting for approximately one hour
was targeted at all 13 DNS root name servers.[1]
This event was the first significant attack directed at
disabling the Internet itself instead of specific websites. This
was the second significant failure of the root nameservers. The
first caused the failure of seven machines in April 1997 due to a
technical problem.[2]
February 6,
2007
On February 6, 2007 an attack began at 1000 UTC and lasted
twenty-four hours. At least two of the root servers (G-ROOT and
L-ROOT) reportedly suffered badly while two others (F-ROOT
and M-ROOT) experienced heavy traffic. The latter largely
contained the damage by distributing requests to other root server
instances with anycast
addressing. ICANN published a
formal analysis shortly after the event.[3]
Due to a lack of detail, speculation about the incident
proliferated in the press until details were released.[4]
On February 8, 2007 it was announced by Network World that: "If
the United States found itself under a major cyberattack aimed at
undermining the nation's critical information infrastructure, the
Department of Defense is prepared, based on the authority of the
President, to launch an actual bombing of an attack source or a
cyber counterattack."[5]
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