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NX is a remote access protocol. It is both fast, secure, graphical and open (as opposed to the Telnet protocol, which is only fast and open).
NX is basically a client-server protocol, that allows you to graphically access any machine, It is based on both (open)SSH (for security) and X Compression (for GUI and speed), and NX is much easier to use than normal X protocol.
- Allows you to connect remotely to your desktop, over a secure channel.
- Works well over slow and high latency connections.
- Supports clipboard actions between your local and remote system.
- Supports local printing from the remote applications.
To set up a FreeNX server,
- download the packages for your distribution, e.g.
wget http://download.opensuse.org/repositories/home:/beyerle:/NX/openSUSE_13.1/i586/NX-3.5.0-123.1.i586.rpm wget http://download.opensuse.org/repositories/home:/beyerle:/NX/openSUSE_13.1/i586/FreeNX-0.7.3-7.1.i586.rpm
- install the needed dependencies, e.g. for SUSE Linux 13.1:
yast -i expect rdesktop
- install the packages
rpm -ivh NX-3.5.0-123.1.i586.rpm FreeNX-0.7.3-7.1.i586.rpm
- read how to set it up
- set it up
After NoMachine created NX a few years ago, they released their core libs and commandline tools to the public (as GPL). Kurt Pfeifle - a KDE contributor - took those libs and tools and created a first humble (unreleased) script that automated the setting up of a remote NX connection to a degree. After Kurt introduced Fabian Franz (at the time a contributor to Knoppix and MPlayer) to NX, Fabian created a project called FreeNX; FreeNX is a work-alike implementation of NoMachine's commercial (and closed source) NX Server.
We - the community - can use the GPL'ed implementation of the FreeNX server and the KDE "knx" client (though that one does still miss many features and lacks maintenance). A QT-based free/libre implementation of a NX session client "QtNX" is available, as well.
There's also the GPL-ed client for the 2X server (another commercial product by a different company that uses the NX core libs) that is supposed to work with FreeNX.