Cloudflare outage on June 21, 2022
June 21, 2022 12:38 PM
Today, June 21, 2022, Cloudflare suffered an outage that affected traffic in 19 of our data centers...
Exam time means Internet disruptions in Syria, Sudan and Algeria
June 14, 2022 12:55 PM
As they have done over the past several years, Syria and Sudan are implementing multi-hour nationwide Internet shutdowns. Algeria has also taken a similar approach in the past, but this year appears to be implementing more targeted website/app blocking...
AAE-1 & SMW5 cable cuts impact millions of users across multiple countries
June 10, 2022 10:01 AM
On June 7, the Africa-Asia-Europe-1 (AAE-1) and SEA-ME-WE-5 (SMW-5) submarine cables suffered cable cuts, impactingInternet connectivity for millions of Internet users across multiple countries in the Middle East, Africa, and Asia...
PIPEFAIL: How a missing shell option slowed Cloudflare down
April 05, 2022 12:57 PM
This post tells the story of how a missing shell option called “pipefail” slowed Cloudflare down....
DNSSEC issues take Fiji domains offline
March 09, 2022 10:11 AM
DNSSEC issues with the .fj ccTLD caused problems reaching websites on the island nation...
MORE POSTS
January 21, 2022 12:20 PM
Internet outage in Yemen amid airstrikes
The early hours of Friday, January 21, 2022, started in Yemen with a country-wide Internet outage...
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January 19, 2022 1:58 PM
Tonga’s likely lengthy Internet outage
The latest Internet outage, in the South Pacific country of Tonga (with 169 islands), is still ongoing. It started with the large eruption of Hunga Tonga–Hunga Haʻapai, an uninhabited volcanic island of the Tongan archipelago on Friday, January 14, 2022...
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November 01, 2021 10:41 AM
Sudan: seven days without Internet access (and counting)
It's not every day that there is no Internet access in an entire country. In the case of Sudan, it has been five days without Internet after political turmoil that started last Monday, October 25, 2021...
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October 25, 2021 7:00 PM
Sudan woke up without Internet
Today, October 25, following political turmoil, Sudan woke up without Internet access....
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October 08, 2021 3:16 PM
What happened on the Internet during the Facebook outage
Today, we're going to show you how the Facebook and affiliate sites downtime affected us, and what we can see in our data....
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October 04, 2021 9:08 PM
Understanding how Facebook disappeared from the Internet
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 1.1.1.1. But as we were about to post on our public status page we realized something else more serious was ...
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November 27, 2020 12:00 PM
A Byzantine failure in the real world
At Cloudflare, we are always on the lookout for Single Points of Failure. In this post, we explore the role a failure mode known as a Byzantine fault played in a a real-world incident....
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August 30, 2020 8:55 PM
August 30th 2020: Analysis of CenturyLink/Level(3) outage
Today 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. ...
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July 18, 2020 1:22 AM
Cloudflare outage on July 17, 2020
Today 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 12:28 AM
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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July 12, 2019 3:45 PM
Details of the Cloudflare outage on July 2, 2019
Almost 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. ...
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July 02, 2019 3:50 PM
Cloudflare outage caused by bad software deploy (updated)
Starting 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 Applicatio...
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November 15, 2018 5:22 PM
How a Nigerian ISP Accidentally Knocked Google Offline
Last Monday evening — 12 November 2018 — Google and a number of other services experienced a 74 minute outage. Incidents like this only serve to demonstrate just how much frailty is involved in how packets get from one point on the Internet to another....
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September 07, 2017 8:58 PM
The Story of Two Outages
Over the last two days, Cloudflare observed two events that had effects on global Internet traffic levels. Cloudflare handles approximately 10% of all Internet requests, so we have significant visibility into traffic from countries and networks across the world....
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