![]() The internet infrastructure experts who spoke to WIRED all suggested the likeliest answer was a misconfiguration on Facebook’s part. In this case, though, something more serious appears to be afoot. They can happen for all kinds of wonky technical reasons, often related to configuration issues, and can be relatively straightforward to resolve. ![]() DNS is often referred to as the internet’s phone book it’s what translates the host names you type into a URL tab-like -into IP addresses, which is where those sites live.ĭNS mishaps are common enough, and when in doubt, they're the reason why a given site has gone down. The company’s family of apps effectively fell off the face of the internet at 11:40 am ET, according to when its Domain Name System records became unreachable. It’s a social media blackout that can most charitably be described as “thorough” and seems likely to prove particularly tough to fix.įacebook itself has not confirmed the root cause of its woes, but clues abound on the internet. Update 4:22 pm EDT: New York Times technology reporter Sheera Frenkel reports that some Facebook employees are unable to enter buildings due to badge access also being down from the outage.A Facebook, Instagram, WhatsApp, and Oculus outage knocked every corner of Mark Zuckerberg’s empire offline on Monday. The withdrawn routes do not appear to be the result of nor related to any malicious attack on Facebook's infrastructure. Not long after that, Reddit user u/ramenporn reported on the r/sysadmin subreddit that BGP peering with Facebook is down, probably due to a configuration change that was pushed shortly before the outages began.Īccording to u/ramenporn-who claims to be a Facebook employee and part of the recovery efforts-this is most likely a case of Facebook network engineers pushing a config change that inadvertently locked them out, meaning that the fix must come from data center technicians with local, physical access to the routers in question. If the BGP routes for a given network are missing or incorrect, nobody outside that network can find it. 1.1.1.1 started seeing high failure in last 20mins.- Dane Knecht October 4, 2021 It appears their BGP routes have been withdrawn from the internet. ![]() With no BGP routes into Facebook's network, Facebook's own DNS servers would be unreachable-as would the missing application servers for Facebook-owned Instagram, WhatsApp, and Oculus VR. (BGP-short for Border Gateway Protocol-is the system by which one network figures out the best route to a different network.) Instagram and WhatsApp were reachable but showed HTTP 503 failures (no server is available for the request) instead, an indication that while DNS worked and the services' load balancers were reachable, the application servers that should be feeding the load balancers were not.Ī bit later, Cloudflare VP Dane Knecht reported that all BGP routes for Facebook had been pulled. Facebook-owned Instagram was also down, and its DNS services-which are hosted on Amazon rather than being internal to Facebook's own network-were functional. ![]() ![]() The problem goes deeper than Facebook's obvious DNS failures, though. Without working DNS, your computer doesn't know how to get to the servers that host the website you're looking for. 3GHJ3mW0P0- Jim Salter (aka □ October 4, 2021ĭNS-short for Domain Name System-is the service that translates human-readable hostnames (like ) to raw, numeric IP addresses (like 18.221.249.245). TL DR: Google anycast DNS returns SERVFAIL for Facebook queries querying directly times out. ![]()
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