The Deep Learning Workbench (DL Workbench) preview feature is a web application that is only intended for use on a developer's local machine. It is deployed as a web server running within a Docker container.
By default, the Docker file that is used to initiate the DL Workbench ensures that the container and the web application are only accessible on the localhost. This ensures that only the local user who deployed the Docker container is able to access it.
It is NOT RECOMMENDED to configure the DL Workbench to accept external connections since the current version does not have user authentication or TLS configured.