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Is connection from home server to cloudflare HTTPS or HTTP when using cloudflare tunnel? (programming.dev)

submitted 2 months ago by [email protected] to c/[email protected]

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I had self-hosted services on a Raspberry Pi using Docker in my college room. Since I couldn't set up port forwarding, I couldn't enable HTTPS for them. I know that I can still have https without port forwarding but it is not straightforward and difficult for me. And, I used cloudflare tunnel to access them from outside my college network. When I access them using cloudflare tunnel, it uses HTTPS. However, I found conflicting information online about the connection between the server and cloudflare, with some sources saying it's HTTP and others saying it's HTTPS. What's true?

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[–] [email protected] 1 points 2 months ago

I believe Cloudflare has a trusted root cert that is distributed with browsers and such, and for tunnels, they generate a signed cert for that hostname interaction, and act as a reverse proxy to your machine when called. This should always show as an HTTPS host, but there must be a mechanism via DNS or something to identify and authorize your host to serve HTTPS, and if that lapses for some reason, I would assume they default to plain HTTP.

I'm just thinking about this logically and having used this particular setup though.