Secure Network in different platforms

Secure network access control also provides additional levels of protection around individual parts of the network after a user has gained access, ensuring application security.
Advanced control limits how much of a machine the administrator or users can manage. By default, VNC is hidden on Windows and also on Linux/Unix, preventing access to additional advanced control settings, while there are also other options like hardware changes, you can do with the help or resources from sites as https://www.fortinet.com/products/ethernet-switches.
Virtual VNC is another possibility available in the minimal Windows/Linux environment as an alternative to VNC. Virtual VNC can be used to securely share access to the entire computer (as opposed to using VNC password to share control of the VNC server).
So, what else can you do to secure your VNC server? Unfortunately, it is not simple. VNC is only as secure as its application (in the context of server access) and this depends largely on hardware security, the physical security of the machine that is being used for VNC access and the type of security tool used to maintain, protect, monitor and control the computer.
Although software can be secure, when dealing with actual servers, the security of the software can be easily bypassed (this is why security should be the first layer of access control). Therefore, it is advisable to have a number of layers of security involved before using VNC and it should be done in accordance to the type of computer (PC, Mac, Linux/Unix, Windows, or cloud) that you are considering.
Since the introduction of the VNC server in 1999, the product has changed significantly and further new VNC Server variants exist on the market (for example: VNC Connect, Hyper VNC, or Virtual Desktop Manager). The VNC server as well as the vNC client are both free software and so there is no need to worry about it breaking; indeed, security makes a lot of sense from a software security point of view. In case of virtual VNC, each Virtual VNC Server has its own IP address or even IP range, so on a large network, we could find that our IP ranges could easily range from several hundred to several thousand machines. However, many of the VNC Server variants work well on a wide range of machines; on a few such servers, for example, we can have more than one million computers all connected to the same server. Since virtual VNC has come up, many people have already connected thousands of machines using a virtual vNC server.
For these people, there is no need to worry about the “access control” issues because the access on the VNC server can be easily controlled. When a person gains access to a server on a virtual VNC client (or a guest VNC server) using user account credentials, the client/server sends the credentials to a secure server using a standard socket-like protocol that is designed to keep them safe. So it is important to notice that vNC server is not really VNC; on the contrary, it is an independent server.