On October 5, Facebook's engineering team posted a blog post explaining the cause of the outage. A little before 21:00 UTC, Facebook resumed announcing BGP updates, with Facebook's domain name becoming resolvable again at 21:05 UTC. By 15:50 UTC, Facebook's domains had expired from the caches in all major public resolvers. This made Facebook's DNS servers unreachable from the Internet. Ĭloudflare reported that at 15:39 UTC, Facebook made a significant number of BGP updates, including the withdrawal of routes to the IP prefixes, which included all of their authoritative nameservers. Effects were visible globally for example, Swiss Internet service provider Init7 recorded a massive drop in internet traffic to the Facebook servers after the change in the Border Gateway Protocol. Security experts identified the problem as a Border Gateway Protocol (BGP) withdrawal of the IP address prefixes in which Facebook's Domain Name System (DNS) servers were hosted, making it impossible for users to resolve Facebook and related domain names, and reach services. Ĭauses Major DNS resolvers returning "SERVFAIL" status for Border Gateway Protocol (BGP) routing was restored for the affected prefixes at about 21:50, and DNS services began to be available again at 22:05 UTC, with application-layer services gradually restored to Facebook, Instagram, and WhatsApp over the following hour, with service generally restored for users by 22:50. The outage was caused by the loss of IP routes to the Facebook Domain Name System (DNS) servers, which were all self-hosted at the time. It lasted for 7 hours and 11 minutes.ĭuring the outage, many users flocked to Twitter, Discord, Signal, and Telegram, resulting in disruptions on these sites' servers. The outage also prevented anyone trying to use " Log in with Facebook" from accessing third-party sites. On October 4, 2021, at 15:39 UTC, the social network Facebook and its subsidiaries, Messenger, Instagram, WhatsApp, Mapillary, and Oculus, became globally unavailable for a period of six to seven hours. Traffic volume for Facebook services on Octowith a drop during the global outage. We’re working to get things back to normal as quickly as possible, and we apologize for any inconvenience.Outage affecting all Facebook operated services Some sites were knocked completely offline while others were unable to load images, including Twitter’s emojis.įastly blamed an ‘undisclosed software bug’ triggered by a single customer updating their settings, and said 95 per cent of its network was back to normal within 49 minutes.Ī wide array of online services were entirely or partly inaccessible for a short period including HSBC, Barclays, Tesco Bank, Airbnb and Steam.Įxperts suggested the problem was linked to a product offered by Akamai, a US firm, which investigated the issueĮrror messages returned by Instagram’s website indicated the platform’s server was down.įacebook’s official ‘platform status’ page, which tracks problems for developers, was also down, suggesting the problems may have been at the heart of Facebook’s servers.ĬEO Mark Zuckerberg plans to continue the integration of the three platforms in the coming months, with new features such as cross-app group chats between Instagram and Facebook Messenger in the pipeline.įacebook’s full update statement said: ‘We’re aware that some people are having trouble accessing our apps and products. It said an outage had occurred within its authentication system, which is used to log people into their accounts, due to an ‘internal storage quota issue’.ĭisruption at cloud computing firm Fastly affected a number of major websites including The Guardian, The Independent, Reddit and Amazon, as well as the government website Gov.uk. Several major Google-run services including YouTube and Gmail went offline for almost an hour before the company resolved the issue. Hundreds of thousands of people reported outages of the same platforms plus WhatsApp, as #FacebookDown, #instagramdown and #whatsappdown trended on Twitter worldwide.Ī spokesperson for Facebook, which had begun integrating the platforms, apologised and acknowledged ‘some people may have experienced trouble’ but again declined to comment further. This was before integration of the platforms began.īoth acknowledged the issue but refused to comment on its cause. A number of major web services have experienced worldwide outages in recent years, and Mark Zuckerberg’s tech giant has usually been the most reluctant to clarify the issues:įacebook and Instagram users reported being unable to open pages or parts of the apps’ feeds.
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