To connect to Denodo Platform when SSL has been enabled for it, I would follow the steps outlined in the below documentation:
* ["Enabling SSL/TLS for External Clients"](https://community.denodo.com/docs/html/browse/latest/platform/installation/postinstallation_tasks/enable_ssl_connections_in_the_denodo_platform_servers/enabling_ssl_for_external_clients#enabling-ssl-tls-for-external-clients) in the the Denodo Platform Installation Guide
* ["How to connect to Denodo from Tableau Desktop"](https://community.denodo.com/kb/view/document/How%20to%20connect%20to%20Denodo%20from%20Tableau%20Desktop?category=Northbound+Connections) Knowledge Base article
If you are connecting through [ODBC](https://community.denodo.com/docs/html/browse/7.0/vdp/developer/access_through_odbc/access_through_odbc), you should make sure that SSL is enabled in the [DSN](https://community.denodo.com/kb/view/document/DSN%20configuration%20for%20ODBC%20connections%20to%20VDP?category=Northbound+Connections) that will be used to connect to Virtual DataPort.
You can also check "vdp.log," located in "<DENODO_HOME>/logs/vdp," which will give you insight into why you are unable to connect.
Hope this helps!