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On 18 November 2025 at 11:20 UTC (all times in this blog are UTC), Cloudflare's network began experiencing significant failures to deliver core network traffic. This showed up to Inteet users trying to access our customers' sites as an error page indicating a failure within Cloudflare's network. The issue was not caused, directly or indirectly, by a cyber attack or malicious activity of any kind. Instead, it was triggered by a change to one of our database sy

As the surface area for attacks on the web increases, Cloudflare’s Web Application Firewall (WAF)  provides a myriad of solutions to mitigate these attacks. This is great for our customers, but the cardinality in the workloads of the millions of requests we service means that generating false positives is inevitable. This means that the default configuration we have for our customers has to be fine-tuned. Fine-tuning isn’t an opaque process: customers have to get some data points and then decid