How to prevent resellers from being able to create accounts using subdomains of certain domains?

[Valetia]

It appears that by default, resellers are able to create new hosting accounts using subdomains of any domain they wish, including, for instance, subdomains of their hosting provider's domains.

How does one prevent this?

Edit: In fact, how does one prevent resellers from creating accounts using subdomains based on any of the domains currently in use by the hosting provider, such as the provider's clients, etc.?

 

[cPanelMichael]

Hello

Check to ensure the following option under the "Domains" tab in "WHM >> Tweak Settings" is turned off:

"Allow domain parking across accounts"

Note that up until recently, there were no native features that blocked this behavior for new account creation. It was limited to parked/addon domain names. However, internal case number 138729 addresses this issue by adding the functionality to new account creations. It's scheduled for inclusion with cPanel version 11.48.1.

Thank you.