To obtain a certificate using ACME DNS challenges, you'd use this module as described above. But, if you have a different domain (say, my.example.com) CNAME'd to your Duck DNS domain, you have two options:
Not use this module: Use a module matching the DNS provider for my.example.com.
I do the same!
I have a provider that is not supported by caddy, but I can still use it via duckdns delegation!
https://github.com/caddy-dns/duckdns?tab=readme-ov-file#challenge-delegation
Challenge delegation
To obtain a certificate using ACME DNS challenges, you'd use this module as described above. But, if you have a different domain (say,
my.example.com) CNAME'd to your Duck DNS domain, you have two options:my.example.com.