You must configure the database listener port to forward connections to the Dynamic Data Masking listener port. How you configure the listener ports depends on whether the Dynamic Data Masking service runs on the database server or on a standalone server. You can define the listener port that the Dynamic Data Masking service uses through the Services Editor in the Management Console.

If the Dynamic Data Masking service runs on a standalone server, you must route application connection requests to the Dynamic Data Masking listener port.