NoMachine Network lets you configure who can access your computer remotely over the Internet. To configure the NoMachine computer so that only you can access it over the Network service, it must first be added to Network. Being logged in to the Network service is not necessary in order to add a computer to NoMachine Network, but if you wish to limit access to yourself in a click, it is recommended.

On the computer you want to publish, go to Settings > Network > Login and login with your User Id. In Network > Machine > Click the 'Add' button.

Select "Make this computer available only to 'youremail@email.com'." Only you will be able to connect to this computer. Make a note of the computer's Machine Id and Access Id.

A computer's availability on NoMachine Network can be changed at any time.

Now go to the computer or device you want to connect from and start your connection using the Machine Id of your target computer.