Prevent Plesk's background services to communicate to services on the internet on servers that are placed on a private network/intranet .
Create a feature that enables switch off background services on Plesk like Extension catalog, Application (APS) catalog, KA service to trying to communicate with external Plesk's service servers on the internet.
It will be usefull on Plesk servers that will be placed on internal/intranet networks were access to the internet is not possible, since requests to external services makes Plesk UI slow as the connection to external services fails.
There are no plans to make Plesk a web server control panel for servers that are not connected to the Internet. For licensing, updates and server functions such as SSL with OCSP stapling it is also required to have Internet access. As this request did not become popular during the past years, we must decline it.