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Do you want some VNC viewer to access remotely to your computers? Well, check this list of the best VNC client for Windows, Mac & Linux.

Remote Desktop feature or also known as VNC (Virtual Network Computing) is a function that allows you to manage any device remotely, in such a way that it is the user or administrator who controls it.

The control is such that in many cases you can have a small sale with the desktop of the remote computer as if it were a small monitor. This function is, and you only need a High-Speed Internet connection to control the system of another computer.

Once you are connected, a computer window will open in which you will see the desktop of the remote system and through whose window you can operate your mouse or your keyboard to enter a code, password or make an exact configuration.

Companies dedicated to offering remote assistance or support for technical problems or even support calls use these VNC clients to be able to manage specific configurations to their clients’ computers or to check if there are problems or not.

The user can access their personal computer through the app, which is installable on Windows, Mac, Linux, FreeBSD, as well as mobile versions for iOS and Android. The latest version also enables remote control of Android devices. Easy remote desktop control. AnyDesk is among the most popular remote desktop control apps in the world.

Another utility that Remote Desktop allows you is to have an operating system inside another operating system. In this case from your computer with Linux, you can control any computer or computer with Windows or MacOS, all on time.

Everything seems very easy, and it is, however, to use any VNC client we have to keep in mind that you need a powerful computer and above all a fast connection.

So let’s see the best VNC client for Windows, Mac & Linux.

Vinagre

Vinagre is a tool integrated into distributions with Gnome desktop. Like Gedit, Vinagre occupies the functions of VNC within the Gnome desktop although it can be changed or removed. Vinegar is also in other desktops that have little to do with Gnome as Ubuntu Unity. Its configuration is straightforward although you must have specific knowledge of networks. To use Vinegar you only have to indicate the IP address of the equipment to be controlled and the IP address.

In the case of the other computer, it has to add the IP address of your computer. Vinegar is a powerful but easy tool for novice users, which is why many developers leave this tool in their operating systems, developments, etc.

For users of KDE and similar environments that use the QT libraries, the option identical to Vinegar is called KRDC, a program that is installed by default as well as Vinagre in Gnome and that offers the same features and focuses for the same type of user, users with knowledge of networks.

TeamViewer

TeamViewer is a free VNC client for Windows, Linux, and MAc that also has apps for Android and iPhone. Its operation is so simple that it has excelled not only at a business level but also at a personal level as the best VNC Client.

You only have to install the host and client app on both computers. Then the program will give you a code that applies to that computer. Then, to connect and control the laptop remotely you have to enter the password of the other computer, and that’s it.

As you can see, you don’t need to know about networks or IP addresses, and the configurations of other programs don’t influence the use of TeamViewer. Unfortunately, TeamViewer is not a free app but it is proprietary, and that causes a lot of rejection although if you don’t have much knowledge of networks, the best option is to opt for this tool.

AnyDesk

Simplicity and security are the two characteristics that could define AnyDesk. This VNC client doesn’t have a version on iOS or Android, but you can control Windows computers or macOS remotely. Another point where most stands out AnyDesk is in the speed of the connection.

The connection is effortless to make. You must open the same app on the client and the server. The app doesn’t need or that you install it, it is portable (it weighs only 1.5 MB). On the client computer you enter the ID of the server computer, accept the request from the server computer, and you will be managing it. When you move the mouse on the client, it will automatically move it on the server.

Ammyy Admin

The interface of Ammyy Admin reminds me a lot of one of the first VNC clients. As you can see in the screenshot, the design is outdated, but that doesn’t matter, it works very well despite it. The advantage of this app compared to the rest is clear: you can establish the connection speed. You will be notaries who will choose at what speed you connect and will not be the servers of the company who imposes it on us.

There are two types of connections in this program: remote control and “Just watch.” The second is as if you were in a video conference through Hangouts or Skype, where, of course, the client can’t control the computer. Ammy Admin weighs much less than other clients (755 KB) and doesn’t require installation either.

RealVNC

RealVNC is a program with similar code to Vinagre. Both projects are based on the same code, but RealVNC has versions for many more platforms, not only for Gnu/Linux but for other platforms such as MacOS or Windows and free hardware platforms such as Raspberry Pi.

In this case, RealVNC is more difficult for novice users. Hence, RealVNC isn’t present in many distributions in a pre-installed way, but rather it is necessary to use repositories or external packages. If you need the latter, on the official website, you can find them for free.

SSH

Surely SSH will sound, and in many cases, you will even have used it. SSH is a program that uses the SSH protocol and allows us to connect remotely to an operating system. Although in this case the connection is made through the terminal.

Something that makes you unable to use the mouse and you also need fewer resources than in other apps, but it is also a problematic protocol that can cause security problems.

Chrome Remote Beta

This option is proprietary like TeamViewer, but it is also suitable for novice users. This Google solution allows us to use the Remote Desktop with a browser plugin. Chrome is a well-used browser among computers, not only in Windows or MacOS but also in Gnu/Linux, so you can almost use this function in any operating system. For its use and installation, you only have to install the plugin in the Chrome browsers of both operating systems.

Wrapping Up: Best VNC Clients

These are the best VNC clients that you can use for free on Windows, Linux or Mac and undoubtedly many of you will ask what is better.

Read: 8 Best Portable Linux Distros to Run from USB

Personally, I think Vinagre is a great tool for personal computers. However, if you are novice users, the best option is in TeamViewer, an easy choice for the novice user despite being proprietary. And you, what program do you choose?

In computing, Virtual Network Computing (VNC) is a graphical desktop-sharing system that uses the Remote Frame Buffer protocol (RFB) to remotely control another computer. It transmits the keyboard and mouse events from one computer to another, relaying the graphical-screen updates back in the other direction, over a network.^[1]

VNC is platform-independent – there are clients and servers for many GUI-based operating systems and for Java. Multiple clients may connect to a VNC server at the same time. Popular uses for this technology include remote technical support and accessing files on one's work computer from one's home computer, or vice versa.

VNC was originally developed at the Olivetti & Oracle Research Lab in Cambridge, United Kingdom. The original VNC source code and many modern derivatives are open source under the GNU General Public License.

There are a number of variants of VNC^[2] which offer their own particular functionality; e.g., some optimised for Microsoft Windows, or offering file transfer (not part of VNC proper), etc. Many are compatible (without their added features) with VNC proper in the sense that a viewer of one flavour can connect with a server of another; others are based on VNC code but not compatible with standard VNC.

VNC and RFB are registered trademarks of RealVNC Ltd. in the US and some other countries.

History[edit]

The Olivetti & Oracle Research Lab (ORL)^[3] at Cambridge in the UK developed VNC at a time when Olivetti and Oracle Corporation owned the lab. In 1999, AT&T acquired the lab, and in 2002 closed down the lab's research efforts.

Developers who worked on VNC while still at the AT&T Research Lab include:^[4]

• Tristan Richardson (inventor)
• Andy Harter (project leader)
• James Weatherall

Following the closure of ORL in 2002, several members of the development team (including Richardson, Harter, Weatherall and Hopper) formed RealVNC in order to continue working on open-source and commercial VNC software under that name.

The original GPLed source code has fed into several other versions of VNC. Such forking has not led to compatibility problems because the RFB protocol is designed to be extensible. VNC clients and servers negotiate their capabilities with handshaking in order to use the most appropriate options supported at both ends.

As of 2013, RealVNC Ltd claims the term 'VNC' as a registered trademark in the United States and in other countries.^[5]

Etymology[edit]

The name Virtual Network Computer/Computing (VNC) originated with ORL's work on a thin client called the Videotile, which also used the RFB protocol. The Videotile had an LCD display with pen input and a fast ATM connection to the network. At the time, network computer was commonly used as a synonym for a thin client; VNC is essentially a software-only (i.e. virtual) network computer.^{[citation needed]}

Operation[edit]

• The VNC server is the program on the machine that shares some screen (and may not be related to a physical display – the server can be 'headless'), and allows the client to share control of it.
• The VNC client (or viewer) is the program that represents the screen data originating from the server, receives updates from it, and presumably controls it by informing the server of collected local input.
• The VNC protocol (RFB protocol) is very simple, based on transmitting one graphic primitive from server to client ('Put a rectangle of pixel data at the specified X,Y position') and event messages from client to server.

In the normal method of operation a viewer connects to a port on the server (default port: 5900). Alternatively (depending on the implementation) a browser can connect to the server (default port: 5800). And a server can connect to a viewer in 'listening mode' on port 5500. One advantage of listening mode is that the server site does not have to configure its firewall to allow access on port 5900 (or 5800); the duty is on the viewer, which is useful if the server site has no computer expertise and the viewer user is more knowledgeable.

The server sends small rectangles of the framebuffer to the client. In its simplest form, the VNC protocol can use a lot of bandwidth, so various methods have been devised to reduce the communication overhead. For example, there are various encodings (methods to determine the most efficient way to transfer these rectangles). The VNC protocol allows the client and server to negotiate which encoding they will use. The simplest encoding, supported by all clients and servers, is raw encoding, which sends pixel data in left-to-right scanline order, and after the original full screen has been transmitted, transfers only rectangles that change. This encoding works very well if only a small portion of the screen changes from one frame to the next (as when a mouse pointer moves across a desktop, or when text is written at the cursor), but bandwidth demands get very high if a lot of pixels change at the same time (such as when scrolling a window or viewing full-screen video).

VNC by default uses TCP port 5900+N,^[6][7] where N is the display number (usually :0 for a physical display). Several implementations also start a basic HTTPserver on port 5800+N to provide a VNC viewer as a Java applet, allowing easy connection through any Java-enabled web-browser. Different port assignments can be used as long as both client and server are configured accordingly. A HTML5 VNC client implementation for modern browsers (no plugins required) exists too.^[8]

Although possible even on low bandwidth, using VNC over the Internet is facilitated if the user has a broadband connection at both ends. However, it may require advanced NAT, firewall and router configuration such as port forwarding in order for the connection to go through. Users may establish communication through Virtual Private Network (VPN) technologies to ease usage over the Internet, or as a LAN connection if VPN is used as a proxy, or through a VNC repeater (useful in presence of a NAT).^[9][10]

Xvnc is the Unix VNC server, which is based on a standard X server. To applications, Xvnc appears as an X 'server' (i.e., it displays client windows), and to remote VNC users it is a VNC server. Applications can display themselves on Xvnc as if it were a normal X display, but they will appear on any connected VNC viewers rather than on a physical screen.^[11] Alternatively, a machine (which may be a workstation or a network server) with screen, keyboard, and mouse can be set up to boot and run the VNC server as a service or daemon, then the screen, keyboard, and mouse can be removed and the machine stored in an out-of-the way location.

In addition, the display that is served by VNC is not necessarily the same display seen by a user on the server. On Unix/Linux computers that support multiple simultaneous X11 sessions, VNC may be set to serve a particular existing X11 session, or to start one of its own. It is also possible to run multiple VNC sessions from the same computer. On Microsoft Windows the VNC session served is always the current user session.^{[citation needed]}

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Users commonly deploy VNC as a cross-platform remote desktop system. For example, Apple Remote Desktop for Mac OS X (and more recently, 'Back to My Mac' in 'Leopard' - Mac OS X 10.5) interoperates with VNC and will connect to a Unix user's current desktop if it is served with x11vnc, or to a separate X11 session if one is served with TightVNC. From Unix, TightVNC will connect to a Mac OS X session served by Apple Remote Desktop if the VNC option is enabled, or to a VNC server running on Microsoft Windows.^[12]

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In July 2014 RealVNC published a Wayland developer preview.^[13][14]

Security[edit]

By default, RFB is not a secure protocol. While passwords are not sent in plain-text (as in telnet), cracking could prove successful if both the encryption key and encoded password were sniffed from a network. For this reason it is recommended that a password of at least 8 characters be used. On the other hand, there is also an 8-character limit on some versions of VNC; if a password is sent exceeding 8 characters, the excess characters are removed and the truncated string is compared to the password.

UltraVNC supports the use of an open-source encryption plugin which encrypts the entire VNC session including password authentication and data transfer. It also allows authentication to be performed based on NTLM and Active Directory user accounts. However, use of such encryption plugins makes it incompatible with other VNC programs. RealVNC offers high-strength AES encryption as part of its commercial package, along with integration with Active Directory. Workspot released AES encryption patches for VNC. According to TightVNC,^[15] TightVNC is not secure as picture data is transmitted without encryption. To circumvent this, it should be tunneled through an SSH connection (see below).

VNC may be tunneled over an SSH or VPN connection which would add an extra security layer with stronger encryption. SSH clients are available for most platforms; SSH tunnels can be created from UNIX clients, Microsoft Windows clients, Macintosh clients (including Mac OS X and System 7 and up) – and many others. There are also freeware applications that create instant VPN tunnels between computers.

An additional security concern for the use of VNC is to check whether the version used requires authorization from the remote computer owner before someone takes control of their device. This will avoid the situation where the owner of the computer accessed realizes there is someone in control of their device without previous notice.

See also[edit]

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References[edit]

1. ^Richardson, T.; Stafford-Fraser, Q.; Wood, K. R.; Hopper, A. (1998). 'Virtual network computing'(PDF). IEEE Internet Computing. 2: 33–38. CiteSeerX10.1.1.17.5625. doi:10.1109/4236.656066.
2. ^The VNC family of Remote Control Applications: a list of VNC variants
3. ^'VNC Frequently Asked Questions (FAQ)'. 1999. Archived from the original on 15 August 2000.
4. ^RealVNC Executive Profiles
5. ^Copyright and trademarks RealVNC. Accessed Feb 23, 2018.
6. ^'RealVNC - Frequently asked questions'.
7. ^'UltraVnc Configuration'.
8. ^'noVNC'.
9. ^'OpenWRT VNC repeater'.
10. ^'uVNC repeater'.
11. ^AT&T Laboratories Cambridge (1999). 'X-based VNC server'. Virtual Network Computing. Archived from the original on 19 March 2007. Retrieved 24 March 2007.
12. ^'OnlineVNC Server for Windows OSes'.
13. ^'VNC® Wayland Developer Preview'. 8 July 2014. Archived from the original on 14 July 2014. Retrieved 10 July 2014.
14. ^'RealVNC Wayland developer preview email'. freedesktop.org. 9 July 2014.
15. ^How secure is TightVNC? TightVNC Frequently Asked Questions. TightVNC.com Accessed Feb 23, 2018

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External links[edit]

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• AT&T VNC - Original AT&T-Cambridge VNC website