Happy New Year and Greetings,

I have spent a couple weeks monitoring posts and searching for help in FAQ's
and archives, as well as other related websites.  I don't want to waste
anyone's time with something already covered.  After narrowing many issues
down, thanks to the help of the archives and daily posts, I have one remaining
problem.

I am using RealVNC Server 4 (service mode) on Windows 2000 Professional SP4.
I have installed Cygwin as an SSH service on this box.  I set RealVNC Server
access control options to 'only accept connections from local machine', but I
cannot access the RealVNC server on the machine using PuTTY .56 SSH client
from my Windows XP Pro laptop.  The XP firewall is disabled.  I am running
Zone Alarm Pro on both client and server machines.  RealVNC and SSH/SSHD have
been given appropriate access on both machines.  My SSH client connects and
authenticates successfully.  But when I try to connect with RealVNC viewer to
127.0.0.1, I get the message 'VNC Viewer : Error - server closed connection
unexpectedly'.  There is nothing in the application event logs relating to
this error. There are events showing connection and authentication with sshd
but nothing for WinVNC4 unless I take SSH out of the equation.  I think the
RealVNC server isn't even getting the connection attempt.  Maybe I have missed
a step in configuration of SSH.

RealVNC works flawlessly between the 2 machines before adding SSH into the
picture.  The only way I can connect to the server using SSH is if I disable
the 'only accept connections from local machine' and add the IP address
127.0.0.1 to the access control list on the RealVNC server.  This of course
makes using the SSH tunnel pointless, since the tunnel is not required to
connect.  But, it does however connect.  Shutting down Zone Alarm Pro on the
server gives the same results.

This is all taking place from inside my local network.  I am behind a Linksys
router with port forwarding enabled for TCP ports 22 (SSH), 5800 & 5900
(RealVNC) to my server's IP address.  I can also get the same results from
outside my local network, so at least my port forwarding seems fully
successful.  Thanks in advance for any assistance you can provide.

Kent
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