A recent traffic optimisation test recently left some Western European Facebook users without service.
According to the company the outage was caused when Facebook changed its domain name system (DNS) servers during a traffic optimisation test. The DNS switch reportedly caused some users to be mis-routed and prevented them from accessing the social network.
"Earlier today we made a change to DNS as part of a traffic optimisation test, and that change resulted in some users being temporarily mis-routed. We detected and resolved the issue immediately," a Facebook spokesperson said in a statement.
"But a small number of users located primarily in Western Europe experienced issues accessing the site while the DNS addresses repopulated. We are now back to 100 percent, and we apologise for any inconvenience."
News of Facebook's outage came with false reports that the site may have been hacked. According to the Twitter feed of "Anonymous Own3r" the blackout was caused when the hacker broke down Facebook's systems.
The hacker posted a list of Facebook vulnerabilities to PasteBin as reports of the outage began to circulate. However, according to Venture Beat, those reported vulnerabilities were the product of an automated vulnerability scanner that Facebook has proved produces false positives.
Anonymous Own3r also took credit for the GoDaddy outage last month. GoDaddy denied the hackers claims reporting that the outage was caused by "internal router errors".
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