What Exactly Is A DDoS Attack?

by Lee on April 28, 2009

in Internet Security

A distributed denial-of-service (DDoS) attack involves a large number of computers that have been hijacked and networked into a botnet.

This collection of compromised systems then attack a single website, grinding it to a halt, and thereby denying service to all those internet surfers who wish to visit said website.

ddos-attack

In essence, a DDoS attack will flood the target system’s server with information and requests which will eventually cause it to shut down and, therefore, deny the normal service to legitimate users.

The person, or syndicate, behind a DDoS attack will use a botnet, comprising of one vulnerable computer that will act as the DDoS master and, potentially, millions of other hijacked machines which will act as the master’s slaves.

The controller of the botnet can then issue a single command through the master, directing all the slaved machines in the network to flood the target system many times over and for as long as they feel is necessary to bring the object of their attention to its knees.

This perpetual bombardment of packets of data will eventually lead to a complete denial of service.

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  • { 6 trackbacks }

    How DDOS Attacks Are Being Used To Hold A Company Hostage
    February 20, 2010 at 1:02 pm
    Malware That Changed The World – Code Red
    March 13, 2010 at 11:00 am
    The Botnet Pushdo Creates Large Amounts Of Fake SSL Connection Requests
    March 13, 2010 at 11:19 am
    How Is A Botnet Able To Grow So Quickly?
    March 13, 2010 at 11:18 pm
    Facebook And Twitter Knocked Out By DDOS Attack
    March 14, 2010 at 11:07 pm
    Admin, Server, Dos, Log, Steal And Kill – The 6 Types Of Trojans
    March 15, 2010 at 8:15 am

    { 2 comments… read them below or add one }

    1 Karen S April 29, 2009 at 8:14 pm

    Interesting read always wondered what a dos attack was,

    Reply

    2 Lee April 30, 2009 at 1:16 am

    Well now you know! :)

    Reply

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