When I faced the similar issue, I performed the following,
* In the Virtual Machine Host network manager, add the new Host only network adapter #2 as indicated in the **Denodo Training QuickStart Virtual Machine - User Manual - <version>**.
* Next, in the Virtual Machine settings for the Denodo Training Quickstart Virtual Machine, go to the **Network** menu option and set Adapter 2 to the new that is created and **disable the Adapter 1** which is enabled by default.
* Now, start DQVM and login to find the IP address of the DQVM using the **ipaddr** command.
* In Virtual DataPort Administration tool, create the [JDBC data source](https://community.denodo.com/docs/html/browse/latest/en//vdp/administration/creating_data_sources_and_base_views/jdbc_sources/jdbc_sources#importing-jdbc-sources) with the Database URI as** jdbc:oracle:thin:@<DQVM_IP_ADDR>:1521:xe**.
Hope this helps!