Wikileaks was hit by a second denial of service attack on Tuesday. The assault followed attempts to blitz the site off the web on Sunday night in the run-up to the controversial release of hundreds of thousands of US diplomatic cables.
Analysis of the first attack by DDoS mitigation experts Arbor Networks shows that the assault ran at a relatively modest 2-4Gbps for several hours. The attack, modest by the standards of other attacks this year that have hit 10Gbps and above, was nonetheless severe enough for Wikileaks to move its systems back back over to Amazon's cloud infrastructure in order to seek shelter from the storm.
The source or sources of the attack remain unclear, but Arbor's early analysis lends credence to the theory that more sophisticated application-level attacks targeting vulnerabilities in Wikileak's server rather than a simple packet flood were behind its brief outage on Sunday.
Whoever launched the attack, or whatever method they used, the assault had no effect on stemming the flow of information from the leaked cables.