The attack which started in mid afternoon GMT meant that Twitter was completely offline for a number of hours and other networks such as Facebook suffered degraded service during that time, says CNET News.
[â€¦] It was a simultaneous attack across a number of properties targeting him to keep his voice from being heard," [Max] Kelly [chief security officer at Facebook] said. "We’re actively investigating the source of the attacks and we hope to be able to find out the individuals involved in the back end and to take action against them if we can."
Some reports speculate that the DoS attack was in the form of a spam email campaign where people clicked on a link in spam messages that referenced the Georgian blogger although Facebook doesnâ€™t think itâ€™s spam email. All Twitter says for now is:
[â€¦that it] appears to be a single, massively coordinated attack. As to the motivation behind this event, we prefer not to speculate.
Ironically, I was offline and unplugged for much of yesterday and became aware of the Twitter outage when I came back online at about 4:15pm UK time. With no Twitter, I did the next-best thing: tried Facebook.
That was working for me.
What does this DoS attack and outage mean in the overall scale of things online?
Well, to me it says that the online tools and channels we use are relatively fragile and something we shouldnâ€™t place too much reliance on at the expense of other means of communication.
Or if we do, we should recognize that fragility.
Itâ€™s also a stark reminder that bad guys anywhere are able to cause serious disruption to technology services we do rely on and so cause chaos on a global scale.
I canâ€™t imagine for a minute that this is the last time we experience something like this.