Apologies if I missed this in the documentation, but can I combine:
- use of a CNAME value for the _acme-challenge.example.com
- where the A record value of CNAME is hosted by Cloudflare (in this example).
- use the DNS cloudflare plugin to manage the challenge response
Our example.com domain is hosted on a very old, manually operated environment where it would be infeasible to do challenge response, so we plan to do so via a separate domain hosted by cloudflare.