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The initial versions of the XRDP project relied on a local VNC server installation that had to be present alongside the program, in order to relay the graphics and controls between the user and the server [7] (known as the "VNC forwarding mode"). However, this mode is currently not recommended to use anymore, due to its slow performance.
x11vnc is a Virtual Network Computing (VNC) server program. It allows remote access from a remote client to a computer hosting an X Window session and the x11vnc software, continuously polling [ 4 ] the X server's frame buffer for changes.
Vinca relies on x11vnc to call the final reverse connection, after checking and diagnosing network and destination availability. Supports any Unix operating system with x11vnc (version 0.6 or newer) and has been distributed with extra repositories for Debian (since version 3.1 sarge) and Ubuntu (since version 4.10 warty).
NAT passthrough: the ability to connect to the server behind a NAT without configuring the router's port forwarding rules. It offers an advantage when you can't reconfigure the router/firewall (for example in case it is on the Internet service provider's side), but is a serious security risk (unless the traffic is end-to-end encrypted), because ...
Virtual Network Computing logo VNC in KDE 3.1. VNC (Virtual Network Computing) 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 input from one computer to another, relaying the graphical-screen updates, over a network. [1]
In addition to the Microsoft-created Remote Desktop Services, open-source RDP servers on Unix include FreeRDP (see above), ogon project and xrdp. The Windows Remote Desktop Connection client can be used to connect to such a server. There is also Azure Virtual Desktop which makes use of RDP and is a part of the Microsoft Azure platform.
Xvfb is also used for remote control. VNC over SSH can be faster than X11 over SSH, [4] specially reducing latency over the internet. [5] In this case, Xvfb is often combined with a lightweight window manager (such as Fluxbox or Openbox) and a VNC server such as X11vnc.
The communication protocol between server and client operates network-transparently: the client and server may run on the same machine or on different ones, possibly with different architectures and operating systems. A client and server can even communicate securely over the Internet by tunneling the connection over an encrypted network session.