How can I activate Cloudflare on an external subdomain?
My register is Aruba, while my hosting company is SiteGround (Cloudflare partner). I’ve already activated Cloudflare on the main domain via SiteGround. But then I created also a subdomain in Aruba for a dedicated website on Siteground and when I try to activate Cloudflare also on it, it says that subdomains aren’t supported.
If I understand correct, you have example.com already setup, and you want to set up www.example.com. If so, then you can’t, you can only add domains. Why do you need to set up a subdomain? You can manage all the subdomains through Cloudflare.