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.
Porkbun is a domain registrar, so I’m guessing OP is using their API to edit a DNS record with the challenge so Let’s Encrypt can prove ownership of the domain. Caddy can automate that, however, you need a Caddy build with a plugin for the registrar (use xcaddy), and then supply login details in the Caddyfile.
Here’s the plugin for porkbun, and the README documents how to use it.
I prefer doing it this way so I don’t need to expose my service to the internet to get a TLS cert, and I can also keep port 80 blocked.