VNC Client doesn't display
jnw "at" realvnc.com
Fri Apr 22 11:15:01 2005
Which versions of VNC Viewer and Server are you running on the two machines?
Are you sure that you are not telling VNC Viewer to connect to the HTTP port
on the server (port 5800)? This could cause the behaviour you describe,
since the server would then be waiting for HTTP data and the viewer for an
RFB initialisation message, and so neither would proceed.
You can run VNC Viewer 4 with the command-line:
which will cause it to write verbose output to C:\temp\vncviewer4.log, which
you can then check to see what the last few messages are when it is running
but not presenting you with a dialog.
There is no "vnc.exe" in the VNC distribution, so adding that as an
exception to Sygate won't help.
Wez @ RealVNC Ltd.
> -----Original Message-----
> From: vnc-list-admin "at" realvnc.com
> [mailto:vnc-list-admin "at" realvnc.com] On Behalf Of John W. Colby
> Sent: 22 April 2005 02:20
> To: vnc-list "at" realvnc.com
> Subject: VNC Client doesn't display
> I am trying to setup VNC to run on my sister-in-law's
> computer so that I can
> do tech support. Windows XP Home on her machine, Windows XP Pro on my
> I set up no-ip.com so that there is a dynamic tracking of her
> IP address. I
> set up the VNC server on her machine and it seems to be
> running. I set up
> the firewall to do port forwarding to her machine I run the
> client on my
> laptop and attempt to connect to her machine.
> I have a couple of issues, but the immediate issue is that
> the client runs,
> doesn't give any error message, but also doesn't pop up the
> login screen,
> nor display anything at all. If I look in Task manager, VNC Client is
> running in the Processes tab but NOT in the Applications tab.
> If I try to
> start it again, connecting to her machine, ANOTHER copy of
> the VNC viewer
> opens, does not display, but appears in Task Manager. If I
> run it again,
> and connect to a client where I VNC in all the time, ANOTHER
> copy opens,
> displays the login screen, and allows me access to the
> desktop of my client.
> Thus it appears that it is something to do with connecting to
> the server on
> her machine.
> I run Sygate personal on both my Laptop and on her machine.
> It has been in
> place and functioning on both machines for months. IF I try
> to log in to
> her machine with the firewall running, I get a "can't find
> the host" kind of
> message from VNC, so I know that the VNC requests are getting
> out to the
> web, through the No-IP translation, back to her router,
> THROUGH her router,
> and are blocked by Sygate if it is running on her machine.
> That in itself
> is the other problem since I have VNC.EXE listed in Sygate as
> "allowed", but
> I need to tackle one problem at a time. I disable the Sygate
> firewall on
> her end and then the VNC client I am trying to connect just silently
> connects but will not display.
> Does anyone have a clue what is happening here? I have tried
> to find these
> symptoms on Google but come up empty.
> John W. Colby
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