help with generating ssl for freedns in nginx

[Guest]

Hi,

I've been following this guide to set up some basic selfhosted services
(video)
https://www.youtube.com/watch?v=qlcVx-k-02E
(text)
https://notthebe.ee/blog/easy-ssl-in-homelab-dns01/

I've managed to get things working, but DuckDNS (duckdns.org) seems to be unresponsive most of the time.
I then tried to register my DNS at FreeDNS (freedns.afraid.org), but the generation of a ssl certificate in Nginx fails.
I get the following error message in Nginx:

CommandError: Saving debug log to /tmp/letsencrypt- 
log/letsencrypt.log
Some challenges have failed.
Ask for help or search for solutions at 
https://community.letsencrypt.org/. See the logfile /tmp/letsencrypt- 
log/letsencrypt.log or re-run Certbot with -v for more details.

at /app/lib/utils.js:16:13
at ChildProcess.exithandler (node:child_process:430:5)
at ChildProcess.emit (node:events:518:28)
at maybeClose (node:internal/child_process:1104:16)
at ChildProcess._handle.onexit (node:internal/child_process:304:5)

The domain I chose is <my_subdomain>.privatedns.org.

Does anyone know how I can get Nginx to succeed in generating the ssl certificate so I don't have to start deploying ssl generation myself?

If I have to do it myself any useful resources will be appreciated.

Thanks

[truthfultemporarily@feddit.org]

What is in the debug log?

[Guest]

I have tried on numerous occasions to get freedns.afraid.org to work for me. I would be interested in how you got it going when you do get it all worked out.

[non_burglar@lemmy.world]

Do you have port 80 to nginx open? Certbot dry run will give you some diagnostics, but that is the most common issue (port 80 being closed).