[FreeNX-kNX] What does client connect to?

[Rob Brandt]

I'm investigating FreeNX server and client here.  Excuse the non-technical
questions please; the nomachine site's docs don't seem to be organized very
well and searching on them doesn't seem to reveal the info I need.  Plus the
confusion betweem commercial/open source, client/server, what they promote vs.
what it will do.

I remember hearing about it last year some time, and now a need has arisen but
it seems different than I remember.  I remember the client being a
"generalized" remote client in which you could connect to a NX server
(optimized X Sessions?), Windows Remote Desktop, VNC or a statndard X (KDE,
Gnome, etc) session.  This implied to me that the client could be used without
having to install the server if you didn't want to install NX server on the
server itself.  That's what I prefer to do.

If this is true, how?  I have been trying to do this off and on for a couple of
days now without good results.  I have a new debian server, amd64, and have ssh
working remotely using key encryption with putty.  However when I use the same
info to connect through NX Client (on Windows), I get a message "Authentication
failed for user [me]".  The "Detail" button is disabled.  I have Desktop =
Unix/GNOME, but it fails for any Unix option, including Custom/Run the Console.

What am I missing here?

Thanks.