Downdetector, the global outage tracking site, goes down due to Cloudflare

Downdetector, the real-time outage monitoring website that millions rely on during service disruptions, itself went down on November 18 as the ongoing Cloudflare outage intensified. Several users trying to access Downdetector.in and other regional versions of the site were met with an error message instructing them to “unblock challenges.cloudflare.com,” indicating a failure in Cloudflare’s verification and routing process.

It is worth noting that the Downdetector.com was down earlier. However, Moneycontrol checked and the global version of the website appears to be working fine at the time of writing the article.

What users are seeing

Instead of the usual outage graphs, the site displayed a blank page with a red warning text. The page could not load Cloudflare’s security challenge, which typically appears when traffic is routed through Cloudflare’s protection systems. Since the challenge server was unreachable, Downdetector’s pages were unable to load for many users.

Why Downdetector was affected

Downdetector relies heavily on Cloudflare for content delivery, traffic management, and protection against high-volume requests. When Cloudflare began experiencing widespread internal server errors, many dependent websites, including Downdetector, were unable to handle traffic as usual.

With Cloudflare’s challenge and verification endpoints failing, the protective layer that typically checks whether a user is legitimate could not complete its process. As a result, Downdetector’s own site became temporarily inaccessible — a rare situation where the outage tracking site was affected by the very infrastructure failure it was meant to report.

The issue began around the same time Cloudflare’s network started showing large-scale instability. Once Cloudflare restored partial functionality, Downdetector gradually became accessible again, allowing users to view the dramatic spike in outage reports for dozens of major services.

This incident highlights how deeply integrated Cloudflare is in the global internet ecosystem — and how its disruption can ripple across even the platforms that monitor outages worldwide.