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Diagram of a DDoS attack. Note how multiple computers are attacking a single computer. In computing, a denial-of-service attack (DoS attack) is a cyber-attack in which the perpetrator seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to a network.
The distributed denial-of-service (DDoS) attack was accomplished through numerous DNS lookup requests from tens of millions of IP addresses. [6] The activities are believed to have been executed through a botnet consisting of many Internet-connected devices —such as printers , IP cameras , residential gateways and baby monitors —that had ...
Nevertheless, DDoS attacks on the root zone are taken seriously as a risk by the operators of the root nameservers, and they continue to upgrade the capacity and DDoS mitigation capabilities of their infrastructure to resist any future attacks.
Stacheldraht botnet diagram showing a DDoS attack (Note this is also an example of a type of client–server model of a botnet.). A botnet is a group of Internet-connected devices, each of which runs one or more bots.
In DDoS, amplification is the degree of bandwidth enhancement that an original attack traffic undergoes (with the help of Smurf amplifiers) during its transmission towards the victim computer. An amplification factor of 100, for example, means that an attacker could manage to create 100 Mb/s of traffic using just 1 Mb/s of its own bandwidth. [5]
Slowloris is a type of denial of service attack tool which allows a single machine to take down another machine's web server with minimal bandwidth and side effects on unrelated services and ports. Slowloris tries to keep many connections to the target web server open and hold them open as long as possible.
Stacheldraht uses a number of different denial-of-service (DoS) attack methods, including Ping flood, UDP flood, TCP SYN flood, and Smurf attack. Further, it can detect and automatically enable source address forgery. Adding encryption, it combines features of Trinoo and of Tribe Flood Network. The software runs on both Linux and Solaris. [1]
The first major example of a DDoS attack in Burma was in 2007, during the Saffron Revolution when Burmese activists managed to put videos and pictures of the demonstrations and government crackdown on the internet, at which time the government severed the internet connection for almost two weeks. [8]
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