When One Provider Falls, Half the Internet Falls. What the Cloudflare Outage Showed Us

The Cloudflare outage is no longer a current case. But its impacts are worth recalling – not because of the specific errors, but because of what was most important about it: how extremely dependent today's internet is on a handful of infrastructure companies that most people don't even know about.

When a single configuration error hit Cloudflare some time ago, it wasn't just a technical slip-up. Within minutes large websites, some financial platforms, communication tools and services we take for granted stopped working. Millions of people around the world received 5xx errors and entire parts of the internet suddenly became unavailable.

It revealed something security experts have been saying for years, but the public mostly ignores: the internet today is built on a very thin foundation. And that foundation is held up by only a few players.

Invisible masters of availability

Cloudflare, Amazon Web Services, Google Cloud, Microsoft, CloudFront, Fastly… Most websites, applications and APIs run on infrastructure that isn't their own. It saves time, money and capacity – but at the same time it creates a new kind of risk:

when one fails, everyone who depends on it falls.

And that's exactly the problem. It's not that one company made a mistake. It's that this single company is a critical systemic point for many others, sometimes even the only one.

Single point of failure: a problem everyone knows about… and yet it still happens

"We don't have any single point of failure." This sentence is often heard in management and IT meetings. Reality tends to be different.

The Cloudflare outage showed that:

• redundancy does not necessarily mean resilience,
• geographic distribution does not solve supplier concentration,
• and that even a robust architecture will fail the moment something outside the organization's control fails.

In practice this means that availability and security of services have one thing in common: the supply chain.

Vendor lock-in as a security problem

Companies have gotten used to looking at vendor lock-in economically: "it's cheap, fast and convenient". But its impacts are primarily security-related:

• dependence on the decisions of a single company,
• dependence on its technology,
• dependence on its error-proneness,
• dependence on its incident response,
• and above all a complete loss of control over what happens "under the surface".

From a threat-model perspective it's a problem of the same category as misconfiguration or weak security – just much harder to resolve.

"But such outages are rare." Yes. But their impacts are huge.

That's the paradox: these incidents aren't frequent. But when they happen, they have global impacts.

• The AWS outage in 2021 took down parts of Netflix, Spotify and some cloud services of public institutions in the USA.
• Fastly a year earlier disconnected a large portion of the world's media and e-shops for an hour.
• In 2024 a faulty CrowdStrike update caused one of the most extensive outages of Windows workstations in history.
• And the Cloudflare incident showed that even a single incorrectly generated configuration file can disrupt service availability worldwide in real time.

What this means for companies

There's no room for theory here – the following are practical steps that make sense:

1) Assume a supplier outage

Just as you plan DRP for your own technologies, plan for third-party services too.

2) Minimize concentration

If an entire business rests on a single cloud or security provider, it's a risk, not convenience.

3) Have a fallback

For example:

• a second DNS provider,
• a backup CDN,
• the ability to quickly switch identity providers,
• offline mode for applications.

4) Map the supply chain

Ask yourself: "Who are we actually dependent on?" The answer often surprises.

5) Monitor vendors' transparency

How quickly and openly they inform about incidents is a good indicator of their reliability.

In conclusion

The Cloudflare outage is not just "another technical error". It's a reminder that the internet is an ecosystem interwoven with networks and services that governments and companies rely on every day — and do not own or control.

And the more we depend on these providers, the more they become new critical infrastructures. And the more important it is not only to think about their advantages, but also about what will happen when, simply put… they fall.