how to connect a bluemix app to on-premise db/as400?

Question

trying to connect a bluemix app (java liberty profile) to our on-premise db/as400 using a secure gateway. Denying or allowing all connection, doesn\'t change the error message.

Answer 1

Updating based on further discussion in comments.

Getting empty reply from server on your cURL command to the cloud host:port should be generating logs on your SG Client. It should be the equivalent of a successful connection due to how a database would respond to this sort of connection.

This seems to narrow down the issue to how the request is being created in your Bluemix app. Another comment on the initial question suggests that your driver only accepts select ports as input, so the issue might originate there.