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Traefik conditional certificate for same URL
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this post was submitted on 10 May 2024
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Just serve the CloudFlare certs. If the URL is the same, it won't matter. Doesn't matter if you're talking to a local private address like 192.166.1.100 or a public IP. If you're accessing it via a DNS name, that is what is validated, not the underlying IP.
PS. If you tried this and are having issues. We need more details about how things are set up, and how you are accessing them.
If I use the Cloudflare origin server certs, the browser shows insecure and the message is "certificate not trusted" which is the same message as self-signed, if I'm not mistaken. I'm not sure what other details are relevant as I'm still new-ish to the networking portion of this home server thing. I'm happy to answer any questions if you suspect something.
I somewhat wonder if CloudFlare is issuing two different certs. An "internal" cert your servers use to serve to CloudFlare, which uses a private CA only valid for CloudFlare's internal services. CloudFlare's tunnel service validates against that internal CA, and then serves traffic using an actual public CA signed cert to public internet traffic.
Honestly though, I kinda think you should just go with serving everything entirely externally. Either you trust CloudFlare's tunnels, or you don't. If you don't trust CloudFlare to protect your services, you shouldn't be using it at all.
That's what I'm settling on. However, it's not just about trust, some of the services I'm exposing deal with moving files and I'm mostly interested in higher speeds associated with local transfers as well as not using up my internet data cap.