About forbidding user's website SSH

Hello, this is from the translation, you may not be able to understand what I mean.

I want to prohibit SSH of user’s website, because it can connect to the server through SSH for CC and other malicious operations, which will not make it a good panel for selling virtual hosts, but it can’t deny its perfect.

At the same time, I also want to ask why users can still add DNS in its operation interface when I shut down DNS in the background