Without it, you will get the error Authentication failed. This protocol can perform really well and gives local speed responsiveness, just like you are sitting in front of your computer. Clearly FreeNXs documentation is lacking, in that it didnt warn me about this. NoMachine is a fast, secure, cross-platform, and high-quality remote desktop client based on NX protocol.

Gian Filippo Pinzari, NX Development Architect and KDE enthusiast from NoMachine provides the foundation of the NX Terminal Server technology by developing the GPLed libraries which are used by the FreeNX Server.

To connect to one of SISSA workstation, you must import our ssh key into your local NX client, because we have replaced the default ssh public key that comes with NX. I didnt know it at the time, but the Windows client includes a Cygwin DLL - and it clobbered by existing Cygwin installation, somehow (I forget the details - I think it modified important registry settings). kNX Client is developed by Joseph Wenninger.

Be sure to check Show the Advanced Configuration Dialog

Freenx client