The HTTP Proxy driver consumes external non-Portus web services via their WSDL, and then allows them to be called via Portus.
Right-click the "Proxy Pass-thru Driver" entry and select Discover
Enter the URL of the WSDL. Alternatively, click the Browse button, and choose the file from disk
The wizard will now create a Portus "Proxy service" for the selected WSDL. The WSDL for this service will be equivalent to the initial WSDL, with the exception of the service endpoint.
When Portus receives a request from a client to this Proxy Service, it will relay the request to the endpoint in the original WSDL, and return the response from this endpoint.