I try to use the Let's encrypt plugin, but it is not possible for me. The acme-challenge fails, because my server has no public IP, I use NAT to make the server accessible from public internet. And so the server can't connect to himself with his public IP
If I add the domain to the local /etc/hosts with the RFC1918-IP, it works, but I don't want to add all domains to this file.
What can I do?