I have signed up for cloudflare via plesk. When I go to add my DNS servers to cloudflare (external and not plesk) it defaults me to say that I need to login to plesk for DNS. There doesn’t appear to be a way around this. So, for my external dns I have added the following entries and setup to plesk.
NS Configuration - domain dot com - IP address of Plesk
Plesk Configuration - redirect to www.domain dot com
NS Configuration - www.domain dot com - www.domain.com.cdn.cloudflare dot net
However, I receive an error 1016.