Inside Outages: What Happens When Cloudflare Goes Down?

The internet’s fragility was laid bare recently when a simple configuration error at Cloudflare knocked out access to some of the world’s most popular platforms.

The San Francisco-based company, which provides cybersecurity services like bot detection and DDoS attack mitigation for roughly 20% of global websites, saw a routine update go wrong. 

Among the casualties are OpenAI’s ChatGPT and Elon Musk’s X.

As services went dark across the web, thousands of users flocked to Downdetector to report problems. 

ChatGPT users were met with cryptic error messages telling them to “unblock challenges cloudflare.com to proceed”, while X displayed notifications blaming internal server issues on a Cloudflare error. 

Zoom, Grindr and Canva also found themselves impacted.

The variety of affected services proves just how deeply Cloudflare’s infrastructure has embedded itself in the modern internet. 

Even Downdetector buckled under the surge in traffic, leaving users with nowhere to check whether others were experiencing the same issues.

But what is the ripple effect of an internet outage?

When one configuration file brings down the internet

Cloudflare called the incident a “significant outage” caused by a configuration file designed to manage threat traffic that simply didn’t work as intended. 

The file “triggered a crash” in software handling traffic across the company’s broader infrastructure – a textbook example of how one technical misstep can cascade through interconnected systems.

“We apologise to our customers and the Internet in general for letting you down today,” Cloudflare says in a statement. 

“Given the importance of Cloudflare’s services, any outage is unacceptable.”

While the company confirms the issue had been resolved, it warns that some services might continue experiencing hiccups during recovery. 

Importantly, Cloudflare stresses there was no evidence of an attack or malicious activity behind the outage.

The incident shows the complexity of maintaining infrastructure at such a scale. When one in five websites globally are being protected, even routine updates carry enormous risk.

What Cloudflare’s outage reveals about global internet infrastructure

The widespread disruption highlights how concentrated internet infrastructure has become.

Alp Toker, Director of NetBlocks, which monitors web service connectivity, describes the incident as “a catastrophic disruption to Cloudflare’s infrastructure”.

“What’s striking is how much of the internet has had to hide behind Cloudflare infrastructure to avoid denial of service attacks in recent years,” he tells the BBC, referencing the company’s role in shielding websites from attempts to overwhelm them with malicious traffic.

Despite offering protection and convenience, the company has become “one of the internet’s largest single points of failure”, he says – a troubling reality for the countless organisations that depend on it, particularly as mounting cyber threats have pushed companies to consolidate their security with proven providers.

Yet this isn’t an isolated problem. 

Amazon Web Services (AWS) suffered a similar outage last month, taking more than 1,000 sites and applications offline. 

Microsoft Azure experienced issues shortly afterwards. 

The pattern points to a trend in digital infrastructure vulnerability.

Jake Moore, Global Cybersecurity Advisor at ESET, observes that organisations face limited choices when selecting infrastructure providers.

“The outages we’ve witnessed these last few months have once again highlighted the reliance on these fragile networks,” he says.

“Companies are often forced to heavily rely on the likes of Cloudflare, Microsoft and Amazon for hosting their websites and services, as there aren’t many other options.”

Investors also took notice – and Cloudflare’s share price traded roughly 3% lower shortly after 15:00 GMT following the incident.

The AI factor as a result of internet outages 

Bob Wambach, Vice President of Portfolio and Strategy at Dynatrace, frames the incident within the expanding technological complexity brought on by AI. 

The ChatGPT disruption proves particularly relevant given the platform’s growing role in business operations worldwide.

“The moment a vital service goes down, users find themselves unable to access sites and applications they rely on, demonstrating how quickly disruption spreads when a core layer of internet protection is affected,” Bob says.

“Global incidents like this are a clear reminder of how dependent our world has become on software and digital systems operating as expected.

“Today’s IT environments are far more complex and interconnected than many realise, so when an outage occurs, the ripple effects can quickly spread across industries and into people’s daily lives.”

As digital services become more sophisticated and interconnected, the potential impact of infrastructure failures grows proportionally. 

What starts as a configuration error at a single company can cascade into disruptions affecting everything from business communications to the AI platforms that organisations increasingly can’t live without.

“As our reliance on technology grows and AI continues to reshape how we operate, maintaining that visibility across complex digital ecosystems will be essential,” Bob concludes.

“The organisations best prepared for the future will be those that can see across their entire environment, anticipate risks and adapt quickly when the unexpected happens.”