Subscription confirmed. Thank you for subscribing!
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....
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....
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....
July 12, 2019 4:45PM
Post Mortem Outage Deep DiveAlmost nine years ago, Cloudflare was a tiny company and I was a customer not an employee. Cloudflare had launched a month earlier and one day alerting told me that my little site, jgc.org, didn’t seem to have working DNS any more....
July 02, 2019 4:50PM
Post Mortem Outage Deep DiveStarting at 1342 UTC today we experienced a global outage across our network that resulted in visitors to Cloudflare-proxied domains being shown 502 errors (“Bad Gateway”). The cause of this outage was deployment of a single misconfigured rule within the Cloudflare Web Application Firewall (WAF)...
More Posts
