Hi,
In general, Denodo offers a built-in monitoring tool called Denodo Monitor for monitoring and auditing purposes which can be found in the “<DENODO_HOME>\tools\monitor” directory. On launching the Denodo Monitor, all the activities of the server will be monitored and stored as log files.
Hence, in order to access the information of the server such as user login names, origin of the connection, connection times, etc, I would make use of the Denodo Monitor Tool or an external JMX (Java Management Extensions) client (like Jconsole). Also, to diagnose what happened in the past for the respective Virtual DataPort server, I would create [**Diagnostics**](https://community.denodo.com/docs/html/browse/8.0/en/vdp/dmt/creating_diagnostics_and_diagnostic_intervals/creating_diagnostics/creating_diagnostics) from the DMT, in order to monitor the history of activities.
You could also refer to the document [**Creating Diagnostics and Diagnostic Intervals**](https://community.denodo.com/docs/html/browse/8.0/en/vdp/dmt/creating_diagnostics_and_diagnostic_intervals/creating_diagnostics_and_diagnostic_intervals#creating-diagnostics-and-diagnostic-intervals) and [**Auditing User Access in Virtual DataPort**](https://community.denodo.com/kb/en/view/document/Auditing%20User%20Access%20in%20Virtual%20DataPort) Knowledge Base Article for more information.
Hope this helps!
