A friend of mine forwarded attached posting to me from a FW-1 security list he
subscribes to.

Is this information factual?  I'm not sure I have noticed this "problem" on my
fairly high speed connections using SSH tunnels.  I suppose ZRLE would be
preferred now for best performance if server version supports it?  Any other
comments from members?

Regards,

Glenn Lovitz

 -----Original Message-----
From:   Steve Helms
Sent:   Monday, October 06, 2003 10:14 PM
To:     Security Group
Subject:        VNC tunneling

I thought I'd share this tidbit I finally figured out after getting frustrated
with the speed ov VNC when tunneled through SSH.

When tunneling VNC through ssh and connecting to localhost VNC thinks you are
connecting to a LOCAL connection by default and chooses a very poor encoding
algorithm for the connection.  The RAW encoding that is chosen gives a bit
better graphical representation of the host but a horrible compression and
performance across a WAN.  However, you can specify the encoding you use when
connecting so life is good again.

In Windows running RealVNC don't allow the viewer to 'Auto' choose the
algorithm.  Force it to 'Hexlite' under the options button.

In Linux run:  vncviewer -encodings "hexlite" -compress 6 localhost:X

Hope that helps.  It seems to work great for me now and performs as well as
Citrix or Terminal Services.

--Steve
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