I have a minipc with proxmox on it. I have tried caddy in a lxc to set up DNS challenges to my owned domain and I set the url in my router to point to the IP (for example, proxmox.DOMAIN.com could be 192.168.10.22). The hope was to have everything local within my house and nothing needs the internet to be accessed. Some services I can host in proxmox NEED https to use, which I could not get working with my own certs or ones proxmox could make, thus Caddy. However, I get proxmox with a proper cert, but i cannot get any of the other services from proxmox working. If I were doing it all manually, I would expect DNS issues with the domain, but from what I understand, Caddy by default does wildcard domains which should mean that my services should work. but they do not. Networking is new to me so perhaps I am missing something obvious. Any guidance would be appreciated.
In proxmox, ACME is a service for the root CA of the cluster. It does use letsencrypt, but it does not provide certs for clients.
Sounds like you are probably conflating DNS and PKI certificates.
Yes, I probably did. I am familiar with computers, but know next to nothing about networking. So I was trying a bunch of various things I could find to try to get it to work. the proxmox ACME did not get me certs for my server or for a vm of proxmox so I abandoned that method and tried caddy and GoDoxy but never got them to get certs for services after various attempts. So I reached out here since there are many more people smarter than me here.