In a blog post on Monday, Facebook said that the six-hour outage that took it offline along with Instagram, Messenger, Whatsapp, and OculusVR was the result of a configuration change to its routers — not of a hack or attempt to get at user data.
Facebook says that this disruption to network traffic had a cascading effect on the way our data centers communicate, bringing our services to a halt.
Facebook said: “Our engineering teams have learned that configuration changes on the backbone routers that coordinate network traffic between our data centers caused issues that interrupted this communication.”
On Monday evening, CEO Mark Zuckerberg posted an apology, saying the platforms were coming back online. He said: “Sorry for the disruption today — I know how much you rely on our services to stay connected with the people you care about.”
This was Facebook’s worst outage since 2019, when the site was down for more than 24 hours.