Making a subdomain link to a external link

Welcome to the Cloudflare Community. :logodrop:

What you describe is not the function of a CNAME. You want a redirect.

  1. Create only a AAAA record for the name.
  2. Use 100:: as the address.
  3. Make sure the name is :orange: Proxied.
  4. Use example 4 in the following guide as the basis for your rule.