We have a setup like this:
Main site example.com is hosted with a different provider.
We have a dedicated server with DreamHost to host our sub domain names like sub1.example.com
We don't host any root domains with DH.
We signed up for the CloudFlare Plus package through the DH panel.
Do we need to do anything on our end to get things going? Or is it taken care of by DH's end? I don't have to update the sub domain DNS with our domain provider to point to CloudFlare or anything like that because the root domain's DNS isn't hosted with DreamHost, do I?