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So at this point at least Facebook's DNS server wasn't available. As a result, Facebook and related services have been effectively disconnected from the Internet.Īnd Cloudflare noticed that Facebook has stopped announcing the route to the DNS prefix.

After repeated announcements and withdrawals of routes from Facebook, the DNS server went offline at 1:50, and Cloudflare engineers soon realized that 1.1.1.1 couldn't resolve and suspected a system failure. Then, at around 0:40 on the 5th, when the system failure was confirmed, the peak of the routing change was seen from Facebook.īelow is a more detailed graph of this peak. So Cloudflare tracks all the BGP updates and announcements we see on our global network. Facebook obtains its own AS number and connects directly to the Internet without going through an Internet service provider. The AS number for Facebook, Instagram, and WhatsApp is AS32934, which can be referenced from the following page. Otherwise, the AS will not be discovered or connected by anyone. All AS numbers must use BGP to announce the connection route to the Internet. I'm playing.Įach AS has its own AS number. Simply put, it plays a role like a car navigation system that shows the route when you enter a destination. BGP is an AS (autonomous system) on the Internet, that is, a mechanism for exchanging route information between networks. Launched an internal incident.Īs a result of the investigation, it was found that it was BGP (Border Gateway Protocol) that caused the problem.

'It was as if someone had unplugged the data center cables all at once and disconnected them from the Internet,' Cloudflare said.Ĭloudflare was affected by Facebook's system failure and thought that there might be a problem with Cloudflare's DNS resolver 1.1.1.1, and at 1:51 (Japan time) on October 5, it was titled 'Facebook DNS lookup returning SERVFAIL'.

Name resolution for these services began to fail in DNS, and some of the IP addresses of the infrastructure that underpins the services were also unreachable. Understanding How Facebook Disappeared from the Internetįacebook is scrambling to fix massive outage -The VergeīGP Explained: the protocol that may be behind Facebook's disappearance -The Vergeĭue to a system failure, we can no longer access Facebook and its related services such as WhatsApp and Instagram. Internet infrastructure company Cloudflare explains why Facebook went down globally. owned by Facebook suffered a system failure, and it was inaccessible until around 7 o'clock on the same day. As a result, not only Facebook but also Instagram, WhatsApp, Messenger, Oculus, etc. 11:47:00 Facebook, Instagram, Oculus, WhatsApp are down worldwide, what is the cause?Īt around 0:40 (Japan time) on October 5, 2021, the Facebook system failed and all systems went down.

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