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Traefik conditional certificate for same URL (programming.dev)

submitted 7 months ago* (last edited 7 months ago) by [email protected] to c/[email protected]

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Hey all!

I have a bunch of services running on my home server and was looking to expose some of them publicly via Cloudflare tunnel. This is done and working great using the origin server certificate and strict TLS.

Up until now, I've been using self-signed certs internally but now I don't want to deal with the "proceed anyway" crap on browsers. I have Traefik set up to get certs from Cloudflare using DNS challenge and that seems to be working.

So, now my problem is: how do I switch between these certificates for the same URL when I'm internal vs public? I'd rather keep that traffic local if I'm at home, which is also working, I just can't figure out how to get Traefik to use the appropriate certificate depending on if the request is coming from my LAN or Cloudflare.

Any suggestions? Is there a better way to accomplish what I want to do?

EDIT: Looks like I'm just going full Cloudflare on this one, thanks for your help everyone!

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[–] [email protected] 2 points 7 months ago

That sounds like Cloudflare is giving you certificates intended only to be used for talking to Cloudflare.

You might be able to do it if Cloudflare sends a different SNI. It's probably better if you get real certificates from Let's Encrypt and just use those.