What happened on the Internet during the Facebook outage
October 08, 2021 4:16PM
Today, we're going to show you how the Facebook and affiliate sites downtime affected us, and what we can see in our data....
Understanding How Facebook Disappeared from the Internet
October 04, 2021 10:08PM
Trends Outage BGP DNS FacebookToday at 1651 UTC, we opened an internal incident entitled "Facebook DNS lookup returning SERVFAIL" because we were worried that something was wrong with our DNS resolver 1.1.1.1. But as we were about to post on our public status page we realized something else more serious was going on....
A Byzantine failure in the real world
November 27, 2020 12:00PM
Post Mortem API Postgres Outage EngineeringWhen we review design documents at Cloudflare, we are always on the lookout for Single Points of Failure (SPOFs). In this post, we present a timeline of a real-world incident, and how an interesting failure mode known as a Byzantine fault played a role in a cascading series of events....
August 30th 2020: Analysis of CenturyLink/Level(3) Outage
August 30, 2020 9:55PM
Outage Post MortemToday CenturyLink/Level(3), a major ISP and Internet bandwidth provider, experienced a significant outage that impacted some of Cloudflare’s customers as well as a significant number of other services and providers across the Internet....
Cloudflare outage on July 17, 2020
July 18, 2020 2:22AM
Post Mortem Outage EngineeringToday a configuration error in our backbone network caused an outage for Internet properties and Cloudflare services that lasted 27 minutes. We saw traffic drop by about 50% across our network....
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April 16, 2020 1:28AM
Cloudflare Dashboard and API Outage on April 15, 2020
Starting at 1531 UTC and lasting until 1952 UTC, the Cloudflare Dashboard and API were unavailable because of the disconnection of multiple, redundant fibre connections from one of our two core data centers....
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