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Posted to user@guacamole.apache.org by Philip Herbert <ma...@pherbert.de> on 2017/05/16 21:11:50 UTC
VNC Error handling message
Hello,
I am trying to conect to a vnc server running on a scada device.
The connection is terminated.
Any Idea how this issue can be locked down, or if there is a workaround available to fix this ?
Thanks, Philip
May 16 22:58:02 guacamole guacd[13285]: Creating new client for protocol "vnc"
May 16 22:58:02 guacamole guacd[13285]: Connection ID is "$5c6643c5-da1c-44fb-b12b-cabc0b23e40d"
May 16 22:58:03 guacamole guacd[13309]: Cursor rendering: remote
May 16 22:58:03 guacamole guacd[13309]: User "@257ed6a3-b1f5-4496-83ac-0932da395e3b" joined connection "$5c6643c5-da1c-44fb -b12b-cabc0b23e40d" (1 users now present)
May 16 22:58:03 guacamole guacd[13309]: VNC server supports protocol version 3.3 (viewer 3.8)
May 16 22:58:03 guacamole guacd[13309]: Selected Security Scheme 2
May 16 22:58:03 guacamole guacd[13309]: VNC authentication succeeded
May 16 22:58:03 guacamole guacd[13309]: Desktop name "BR06"
May 16 22:58:03 guacamole guacd[13309]: Connected to VNC server, using protocol version 3.3
May 16 22:58:03 guacamole guacd[13309]: VNC server default format:
May 16 22:58:03 guacamole guacd[13309]: 8 bits per pixel.
May 16 22:58:03 guacamole guacd[13309]: Colour map (not true colour).
May 16 22:58:03 guacamole guacd[13309]: VNC server closed connection
May 16 22:58:03 guacamole guacd[13309]: Error handling message from VNC server.
May 16 22:58:03 guacamole guacd[13309]: Internal VNC client disconnected
May 16 22:58:03 guacamole guacd[13309]: User "@257ed6a3-b1f5-4496-83ac-0932da395e3b" disconnected (0 users remain)
May 16 22:58:03 guacamole guacd[13309]: Last user of connection "$5c6643c5-da1c-44fb-b12b-cabc0b23e40d" disconnected
May 16 22:58:08 guacamole guacd[13285]: Connection "$5c6643c5-da1c-44fb-b12b-cabc0b23e40d" removed.
May 16 22:58:18 guacamole guacd[13285]: Creating new client for protocol "vnc"
May 16 22:58:18 guacamole guacd[13285]: Connection ID is "$9710eb19-5d7d-4b73-9ddc-4fee9ea8ad5e"
May 16 22:58:18 guacamole guacd[13322]: Cursor rendering: remote
May 16 22:58:18 guacamole guacd[13322]: User "@73315eb9-c338-4f2f-ad04-2c2940b63318" joined connection "$9710eb19-5d7d-4b73 -9ddc-4fee9ea8ad5e" (1 users now present)
May 16 22:58:18 guacamole guacd[13322]: VNC server supports protocol version 3.3 (viewer 3.8)
May 16 22:58:18 guacamole guacd[13322]: Selected Security Scheme 2
May 16 22:58:18 guacamole guacd[13322]: VNC authentication succeeded
May 16 22:58:18 guacamole guacd[13322]: Desktop name "BR06"
May 16 22:58:18 guacamole guacd[13322]: Connected to VNC server, using protocol version 3.3
May 16 22:58:18 guacamole guacd[13322]: VNC server default format:
May 16 22:58:18 guacamole guacd[13322]: 8 bits per pixel.
May 16 22:58:18 guacamole guacd[13322]: Colour map (not true colour).
May 16 22:58:19 guacamole guacd[13322]: VNC server closed connection
May 16 22:58:19 guacamole guacd[13322]: Error handling message from VNC server.
May 16 22:58:19 guacamole guacd[13322]: Internal VNC client disconnected
May 16 22:58:19 guacamole guacd[13322]: User "@73315eb9-c338-4f2f-ad04-2c2940b63318" disconnected (0 users remain)
May 16 22:58:19 guacamole guacd[13322]: Last user of connection "$9710eb19-5d7d-4b73-9ddc-4fee9ea8ad5e" disconnected
May 16 22:58:23 guacamole guacd[13285]: Connection "$9710eb19-5d7d-4b73-9ddc-4fee9ea8ad5e" removed.
RE: VNC Error handling message
Posted by Chris Cook <co...@jlsautomation.com>.
Philip,
Assuming that the device you are attempting to connect to is a product offered by one the “standard” SCADA / PLC-HMI players like AllenBradley, Siemens, RedLion Controls, et al…
The VNC server running on the device is most likely limited to a single (one) VNC client connection. In the event that an additional connection request is received while a connection is active, the currently active connection will be dropped. Make sure that no other devices are connected to the HMI by changing either the connection password or the user name and try using GUAC again.
I fight this exact scenario nearly every day – my clients find out that there is a VNC server running on an HMI screen and all of a sudden everyone and their brother wants to have it mirrored to their desktop…
If it is an absolute issue, I would look at different SCADA hardware vendor. I am in the middle of shifting to a B&R platform that offers up 10 concurrent VNC sessions…
- Chris
From: Mike Jumper [mailto:mike.jumper@guac-dev.org]
Sent: Wednesday, May 17, 2017 2:47 AM
To: user@guacamole.incubator.apache.org
Subject: Re: VNC Error handling message
On Tue, May 16, 2017 at 2:11 PM, Philip Herbert <ma...@pherbert.de>> wrote:
Hello,
I am trying to conect to a vnc server running on a scada device.
The connection is terminated.
What VNC server are you using specifically?
...
May 16 22:58:03 guacamole guacd[13309]: VNC server closed connection
Does the VNC server in question have any logs for the connection that failed?
- Mike
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Re: VNC Error handling message
Posted by Mike Jumper <mi...@guac-dev.org>.
On Tue, May 16, 2017 at 2:11 PM, Philip Herbert <ma...@pherbert.de> wrote:
> Hello,
>
>
>
> I am trying to conect to a vnc server running on a scada device.
>
> The connection is terminated.
>
>
What VNC server are you using specifically?
>
> ...
>
> May 16 22:58:03 guacamole guacd[13309]: VNC server closed connection
>
Does the VNC server in question have any logs for the connection that
failed?
- Mike