was little to no impact on Internet users. February 6, 2007 On February 6, 2007 an attack began at 10:00 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 two servers largely mitigated the damage by distributing requests to other root server instances with anycast addressing. ICANN published a formal analysis shortly after the event. Due to a lack of detail, speculation about the incident proliferated in the press until details were released. November 30, 2015 During two intervals on November 30, 2015 and December 1, 2015, several of the root name servers received up to 5 million queries per second each, receiving valid queries for a single undisclosed domain name and then a different domain the next day. Source addresses were spread throughout IPv4 space, however these may have been spoofed. Some root server networks became saturated, resulting in timeouts, however redundancy among the root servers prevented downstream issues from occurring during this incident. Threats Operation Global Blackout 2012 On February 12, 2012, a statement was posted on Pastebin cited to be from Anonymous, threatening an attack on the root servers on March 31, 2012. "To protest SOPA, Wallstreet, our irresponsible leaders and the beloved bankers who are starving the world for their own selfish needs out of sheer sadistic fun, On March 31, anonymous will shut the Internet down," reads the statement. "Remember, this is a protest, we are not trying to ‘kill' the Internet, we are only temporarily shutting it down where it hurts the most…It may only last one hour, maybe more, maybe even a few days. No matter what, it will be global. It will be known." References External links Significant Internet events Internet Traffic Report's synopsis InformationWeek article on February 2007 attack DNS Backbone DDoS DNS Backbone DDoS Domain Name System Denial-of-service attacks