Here is the English translation of the email:
I have two servers - one is an application server, and the other is an Oracle database server. The application server has added some connection methods to allow the application to connect to the backend database.
Now, some users want to connect directly to the database to retrieve data, without going through the application server. However, opening up direct access to the database server does not seem very secure.
Could you please advise how the users can first connect to the application server, and then access the database, instead of connecting directly?