One easily disproved conspiracy theory linked the ~six-hour outage to a supposed data breach tied to a Sept. 22 hacker forum ad for 1.5B Facebook user records.
As of Monday night, Facebook had crawled back from what may have been its longest blackout ever and apologized for the mass outage that left billions of users locked out of Facebook, instagram, WhatsApp, messenger and Oculus VR for about six hours.
*Sincere* apologies to everyone impacted by outages of Facebook powered services right now. We are experiencing networking issues and teams are working as fast as possible to debug and restore as fast as possible
— Mike Schroepfer (@schrep) October 4, 2021
In a Monday night blog post, Santosh Janardhan Facebook’s vice president of infrastructure gave some details about how the house of cards came tumbling down, confirming the border gateway protocol (BGP) and DNS problems that experts at Cloudflare had already detected.
Janardhan said that the company’s engineering crew had traced the source of the problem to a configuration change on the backbone routers: a change to routers that coordinate network traffic between data centers that fractured Facebook’s entire internal backbone.
“Our engineering teams have learned