I’m slightly freaking out. I recently ran some updates on my Linux Mint server computer. Afterwards, my modules, like Porkbun, had been removed and kept giving a 400 error when trying to add-package. Without the porkbun dns module, caddy can’t pass the keys and nothing with reverse proxy from me. The porkbun git page mentions some upgrade to the DNS system a few days ago that they said was connected to this. Any ideas of what to do? Do I downgrade Caddy until they resolve? I’m not the most computer savvy so I appreciate the help.
This part isn’t true, you can use DNS challenge and they don’t need to connect to your service. I have several services on my LAN that have never been accessible from the internet that have Let’s Encrypt certs.
That sounds like the method OP is trying to use.