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Tableau Help > Tableau Server on Windows Help > 

Configure Internal SSL

You can configure Tableau Server to use Secure Sockets Layer (SSL) for encrypted communications on all traffic between the Postgres repository and other server components. By default, SSL is disabled for communications between server components and the repository.

  1. Open the Tableau Server Configuration Utility by selecting Start > All Programs > Tableau Server 2018.1 > Configure Tableau Server.

  2. In the Tableau Server Configuration dialog box, click the SSL tab.

  3. Select one of the following options:

    • Required for all connections

      When this option is selected, Tableau Server uses SSL for communications between the repository database and other server components. In addition, direct connections to Tableau Server (connections using the "tableau" or "readonly" users) must use SSL.

    • Optional for direct user connections

      This option configures Tableau Server to use SSL between the repository and other server components and supports but does not require SSL for direct connections by "tableau" or "readonly" users.

    • Off for all connections (the default)

      This option disables SSL for internal communications and direct connections.

  4. Click OK.

For more information on downloading the public certificate for direct connections, see Configure Postgres SSL to Allow Direct Connections from Clients.