Enabling debug logging
This article applies to the following product(s):VNC
VNC Enterprise Edition
VNC Personal Edition
Both VNC Server and VNC Viewer have a built in log function, which by default logs basic auditing information. For support (and potentially other) purposes, you may want to enable debug logging, which will log every aspect of the connection.
Please note that these logs are only useful for debug purposes, as they contain too much information for every-day auditing purposes.
VNC
Windows
For both VNC Server and VNC Viewer, access the configuration, and navigate to the Expert tab. Under the Expert options, find the Log parameter and change the existing value of:
*:EventLog:0,Connections:EventLog:30
to
*:file:100,Connections:EventLog:30
Ensure that the C:\temp directory exists and is writeable on both the VNC Viewer and VNC Server computer. Logs will be created in:
Server: C:\temp\vncserver.log
Viewer: C:\temp\vncviewer.log
When you have finished debugging, change the value back to:
*:EventLog:0,Connections:EventLog:30
Mac OS X
For both VNC Server and VNC Viewer, access the configuration, and navigate to the Expert tab. Under the Expert options, find the Log parameter and enter the following data:
*:file:100
Logs will be created in:
Server: /Library/Logs/vncserver-service.log (for VNC Server in Service Mode)
Viewer: ~/Library/Logs/vnc/vncviewer.log
When you have finished debugging, change the value back to:
*:file:30
UNIX/Linux
For both VNC Server and VNC Viewer, run the application with the -Log flag:
vncserver -Log=*:stderr:100
vncviewer -Log=*:stderr:100
Logs will be created in:
Server: ~/.vnc/
e.g. mypc.realvnc.com:6.log)
VNC Enterprise Edition/VNC Personal Edition
Windows
For both VNC Server and VNC Viewer, access the configuration, and navigate to the Expert tab. Under the Expert options, find the Log parameter and change the existing value of:
*:EventLog:0,Connections:EventLog:30
to
*:file:100,Connections:EventLog:30
Ensure that the C:\temp directory exists and is writeable on both the VNC Viewer and VNC Server computer. Logs will be created in:
Server: C:\temp\winvnc4.log
Viewer: C:\temp\vncviewer.log
When you have finished debugging, change the value back to:
*:EventLog:0,Connections:EventLog:30
Mac OS X
For both VNC Server and VNC Viewer, access the configuration, and navigate to the Expert tab. Under the Expert options, find the Log parameter and enter the following data:
*:file:100
Logs will be created in:
Server: /Library/Logs/macvnc-service.log
Viewer: ~/Library/Logs/vnc/VNCViewer.log
When you have finished debugging, change the value back to:
*:file:30
UNIX/Linux
For both VNC Server and VNC Viewer, run the application with the -Log flag:
vncserver -Log=*:stderr:100
vncviewer -Log=*:stderr:100
Logs will be created in:
Server: ~/.vnc/
e.g. mypc.realvnc.com:6.log)
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Article Details
Last Updated
19th of June, 2012
