I’ve been to hundreds of threads over the last few days trying to puzzle this out, with no luck.
The problem:
Caddy v2 with acme HTTP-1 ACME challenge (Changed from TLS-ALPN challenge)
Cloudflair DNS with proxy ON
All cloudflair https is off
This is a .co domain
Any attempt to get certificates fails with an invalid challenge response. If I try and navigate (or curl) to the challenge directly I always get SSL validation errors as if all the requests are trying to upgrade to HTTPS.
I’m kind of at my wit’s end here and am running out of things to try.
If I turn Cloud flare proxy off and go back to TLS-ALPN challenge, everything works as expected. However I do not wish to expose myself directly and want to use the proxy.
Having an HTTPS enabled server behind a proxy means the server is connecting with the proxy endpoint. That’s not how HTTPS works. If you want HTTPS enabled for a server BEHIND a proxy, you would do it at the original hand off (forward proxy), in this case meaning the Cloudflare proxy that clients connect to.
You’re seeing the errors because the proxy backend is being told to speak HTTPS with Caddy, and it doesn’t work like that.
You are not logged in. However you can subscribe from another Fediverse account, for example Lemmy or Mastodon. To do this, paste the following into the search field of your instance: !selfhosted@lemmy.world
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don’t control.
Rules:
Be civil: we’re here to support and learn from one another. Insults won’t be tolerated. Flame wars are frowned upon.
No spam posting.
Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it’s not obvious why your post topic revolves around selfhosting, please include details to make it clear.
Don’t duplicate the full text of your blog or github here. Just post the link for folks to click.
Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).
Having an HTTPS enabled server behind a proxy means the server is connecting with the proxy endpoint. That’s not how HTTPS works. If you want HTTPS enabled for a server BEHIND a proxy, you would do it at the original hand off (forward proxy), in this case meaning the Cloudflare proxy that clients connect to.
You’re seeing the errors because the proxy backend is being told to speak HTTPS with Caddy, and it doesn’t work like that.