If you need to configure a computer for access over the Internet and what other NoMachine users to access it, they will require the computer's Machine Id.The Machine Id is what identifies a computer on NoMachine Network. It is what you use to start a NoMachine connection to reach that computer when connecting from the NoMachine Player. The Machine Id is not public in any directory or "address book". You cannot search for it. It is private to the computer.

That said, some users want to apply an extra level of security and ensure that only specific users can reach that computer through the NoMachine Network service. This can be configured in the Network settings.

The options are:

• - make it available to everyone
• - make it available to yourself
• - make it available to specific list of users

This is done on the target machine in the NoMachine Settings > Network > Machine > Machine availability, Change machine availability.

You don't have to be logged in with your User Id, because you can insert User Ids manually in the available field. But a quicker way is to leverage your very own 'Users book'. The Users book is where you store your NoMachine Network contacts. Add all the User Ids and names to your Users book from any device and these records follow you wherever you login. To access it, you need to be logged in on any Player with your own User Id. So, by logging in to Network first, you can access your Users book when configuring the 'Change availability' panel.

If access to the computer is for you only, login and navigate to Network > Machines > Change availability and select the radio button that indicates your User Id. Click 'Apply'.

If you want specific Network users to be able to access the machine, select the User Ids of each user from your NoMachine Users book. Click 'Apply'.  

To remove a user from the 'Change machine availability' panel, right click on the User Id and select 'Remove user'.

You can always check who is authorized to connect to that computer in 'Machine' at any moment in the Network Settings.