Sudan woke up without Internet
October 25, 2021 8:00PM
Today, October 25, following political turmoil, Sudan woke up without Internet access....
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
Today 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 184.108.40.206. 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
When 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....