Monday, March 2, 2020

What is a Distributed Denial-of-Service Attack?

Most DDoS attacks are designed to consume all available network bandwidth or resources on a target network, system, or website. The attacker uses one of many available methods and tools to flood the target with a barrage of malicious or nuisance requests, or to abuse a protocol or inherent vulnerability in such a way that the system can no longer respond to requests. The effects of a DDoS attack are a bit like having the entrance to a concert venue suddenly swarmed by busloads of troublemakers with counterfeit tickets. The legitimate ticket-holders, standing in an orderly line, would never get inside.

DDoS attacks can look like many of the non-malicious things that can cause availability issues – such as a downed server or system, too many legitimate requests from legitimate users, or even a cut cable. It often requires traffic analysis to determine what is precisely occurring.

From a single computer, it’s difficult for attackers to generate the volume of traffic necessary to crash a network or website. To get the bandwidth or processing power needed, attackers often use botnets—armies of hundreds or thousands of Internet-connected computers (zombies or bots) that are infected with malware and under the control of the attacker (the bot master, or bot herder). In most cases, the owners of these infected computers are not even aware they’ve been compromised.
More Info: what is ddos?

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