How to prevent proxy access to private m3u8 files via Cloudflare Workers | Cloudflare Developers | Page 1

grave kernelBOT Jul 28, 2025, 7:23 PM

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Feedback

Feedback has been submitted! Thank you :)

pallid oasis Jul 28, 2025, 7:27 PM

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Note: My content is stored on external bucket (name censored) and served through Cloudflare

narrow plank Jul 28, 2025, 8:48 PM

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You can block workers using the cf-worker header. If you’re in the cf rulesets, there’s a special field to use instead

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@grave kernel block upstream workers in custom waf tules

grave kernelBOT Jul 28, 2025, 8:48 PM

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Feedback

Feedback has been submitted! Thank you :)

narrow plank Jul 28, 2025, 8:49 PM

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It’s hallucinating, great

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Cloudflare Docs

cf.worker.upstream_zone

Identifies whether a request comes from a worker or not.

pallid oasis Jul 28, 2025, 8:50 PM

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Thanks ❤️ I will try it

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~~I cannot use this settings in my waf~~ I can't find this setting 😦

narrow plank Jul 28, 2025, 8:56 PM

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Use expression editor and not the builder

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cf.worker.upstream_zone ne ""

pallid oasis Jul 28, 2025, 8:59 PM

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ohhhhhhh i'm stupid, it works now !!

#How to prevent proxy access to private m3u8 files via Cloudflare Workers