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Enable SSH tunneling by clicking on the checkbox. When it is enabled, five additional fields are shown.

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The SSH Host is the name or IP address for the host accepting SSH connections. The SSH Host is typically the same as the Database Server. Enter the port for SSH connections in the SSH Port field. The default value is 22. 

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In case the JDBC driver supports SSL, you define the SSL settings as Driver Properties for your connection according to the documentation for the JDBC driver. The exact details depend on the versions of the database and the driver, but using PostgreSQL as an example, the settings can look like this:

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Certificates

For ensuring security of the data being transferred between a client and server, SSL can be implemented either one-way or two-way (aka mutual authentication). In one way SSL, only client validates the server to ensure that it receives data from the intended server. In case of two-way SSL, both client and server authenticate each other to ensure that both parties involved in the communication are trusted.

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