denial of service attack

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denial of service attack

An assault on a network that floods it with so many requests that regular traffic is either slowed or completely interrupted. Unlike a virus or worm, which can cause severe damage to databases, a denial of service attack interrupts network service for some period.

Distributed Attack
A distributed denial of service (DDOS) attack can employ hundreds or even thousands of computers that have been previously infected. The computers act as a network of "zombies" working together to send out bogus messages, thereby creating huge volumes of phony traffic.

In 2016, the Dyn DNS system was hammered by a DDOS attack that caused sporadic slowdowns of major sites such as Twitter, Netflix and The New York Times. The zombie traffic reached more than 100 gigabytes per second of bogus messages. See botnet, smurf attack, SYN flood attack, land attack, teardrop attack and Ping of Death.

It's Not a New Phenomenon
In February 2000, computers were activated that had been previously hacked and planted with illicit programs. The unending number of requests caused a denial of service at Yahoo, eBay, and other websites. (Article headline courtesy of the Philadelphia Inquirer.)
References in periodicals archive ?
A firm in the media and entertainment industry was hit by a record-breaking 222 million packets per second (Mpps) DDoS attack, a small increase over a record-breaking attack of 214 Mpps in Q2.
In the event of a DDoS attack, Kaspersky DDoS Protection enables companies to temporarily redirect traffic via an alternative route, running it through cleaning centers that filter out junk requests and forward legitimate traffic.
Specifically, in 24% of all cases a DDoS attack caused services to
released the findings of its latest DDoS Attacks and Protection report, which disclosed that single disruptive attacks are being replaced by continuous, repetitive DDoS attacks.
The attackers used IP addresses as targets for UDP amplification DDoS attack against customer's uplinks, so we used BGP blackhole communities to discard traffic at Edge routers of upstream Tier1 ISPs.
And yet the grand majority of attacks utilizing well known DDoS attack vectors fit this profile.
This report analyzes information on a variety of DDoS attack types and trends collected in the course of providing Secured Hosting and Cloud Security, its DDoS defense service suite based on traffic bypass technology, to customers.
Just how dramatic has been the increase in DDoS attack size?
In fact, a persistent DDoS attack on Burmese Websites during the Burma's 2010 national elections actually caused the entire country's Internet connectivity to go down.
In the case of CloudNine, the DDOS attack prevented users from logging on to the Internet and it shut off access to Websites hosted on its network, Mr Miszti said.
Contrary to the widespread belief that ideological and political motivation are the driving forces behind DDoS attacks, more than half (52%) of the companies surveyed that had been victims of a DDoS attack blamed "competitors looking to gain a business advantage.
Volumetric DDoS attack prevention does not help in defending against DNS specific DDoS attacks for example which is a critical area.