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cyberMEDIUM2026-05-03 14:48 UTC

Detecting paying Cloudflare customers (for fun and profit)

A while back I got curious about whether you could tell the difference between a company paying Cloudflare serious money versus one that signed up for the free plan and forgot about it. First thing I tried: response headers. Don’t bother. Cloudflare returns identical header names whether you’re runn

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