In order to enable CloudFlare from your cPanel account, complete these simply follow the instructions below:
1. Click on the Cloudflare Icon in cPanel under the Software/Services section.
2. Enter your email address and accept the EULA.
3. Select the domain you want to enable cloudflare for on the box on the left.
4. The interface will pull up a list of sub-domains you can enable cloudflare protection on, click on the grey clouds for the sub-domains you want to enable and wait for them to turn orange.