Twitter, Facebook and LiveJournal hit by massive denial-of-service attack

Graham Cluley

Twitter has been hit by a massive distributed denial-of-service attack making the micro-blogging service unavailable for millions of users around the world. Facebook and LiveJournal are also reported to have been affected.

Twitter first confirmed that its site was unavailable on its blog. The reason? An external denial-of-service attack.

A denial of service attack occurs when computers bombard a website with requests for information. Typically hackers can control thousands of innocent users’ computers centrally and command them to visit a site that they wish to flood with traffic – making it impossible for other internet users to get through.

It’s a bit like 15 fat men trying to get through a revolving door at the same time – nothing can move.

In the meantime, micro-bloggers around the world are likely to be left twiddling their thumbs.

You know,…

Read more in my article on the Naked Security website.

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Graham Cluley is a veteran of the anti-virus industry having worked for a number of security companies since the early 1990s when he wrote the first ever version of Dr Solomon's Anti-Virus Toolkit for Windows. Now an independent security analyst, he regularly makes media appearances and is an international public speaker on the topic of computer security, hackers, and online privacy. Follow him on Twitter at @gcluley, or drop him an email.