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:[email protected]] Sent: Wednesday, May 17, 2017 2:47 AM To: [email protected] Subject: Re: VNC Error handling message On Tue, May 16, 2017 at 2:11 PM, Philip Herbert <[email protected]<mailto:[email protected]>> 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 THIS E-MAIL MESSAGE AND ANY ATTACHMENTS ARE INTENDED FOR THE USE OF THE INDIVIDUAL OR ENTITY TO WHICH IT IS ADDRESSED AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, CONFIDENTIAL AND EXEMPT FROM DISCLOSURE UNDER APPLICABLE LAW. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to this message or by sending an e-mail to [email protected] and destroy all copies of this message and any attachments. Thank you.
