So I am getting the typical “server could not connect to client for DV” error. I’ve gone to the extent of running tcpdump to fine that the server can in fact connect to the client and vice-versa. When I run letsencrypt-auto my server connects outbound via HTTPS, then it accepts a connection via HTTPS. This goes back and forth for about 200+ packets after which I get the “server could not connect” error.
Not using Cloudflare
Tried both HTTP and HTTPS
The only thing that works is if I use the manual -a switch and copy the commands to create my own listening HTTP server. Doing this I can get the cert files. However this is not a process I want to try and repeat every 90 days.
What I am wondering is if there is any way to debug the connection process and maybe get some more info? Clearly my client and the server are talking but something else is going wrong along the way. Is there any way to get more information on what might be happening?