To configure EDB Postgres Advanced Server to use SSL, open the 'postgresql.conf' file in an editor. The default location for the postgresql.conf file is in the postgresql data directory (PGDATA). The location of the postgresql.conf for a running EDB Postgres instance can be found using the following command run from a command prompt: > psql -d -U -c 'SHOW config_file' Where is any database in the EDB postgres instance and is a database superuser. By default, a database named 'edb' and a superuser named 'enterprisedb' are installed with EDB Postgres Advanced Server (EPAS). In the postgresql.conf file, set the 'ssl' parameter as follows: ssl = on Ensure the parameter is uncommented. In order to start an EDB Postgres Advanced Server instance in SSL mode, files containing the server certificate and private key must exist. By default, these files are expected to exist in the Postgres data directory and are expected to be named server.crt and server.key, respectively. Update the ssl_cert_file and ssl_cert_key parameters in the postgresql.conf file if the files are placed in a different location or are named differently. Note that changes to the SSL parameter setting and any of the other SSL- related parameters require a database server restart to be put the changes into effect. To restart the database on a systemd server, issue the following command as the root user or a user with sudo access: > systemctl restart edb-as- Where is the major version of the EDB Postgres Advanced Server instance (e.g., 15). To restart the database, issue the following command as the root user or a user with sudo access: > systemctl restart edb-as- Where is the major version of the EDB Postgres Advanced Server instance (e.g., 14). After verifying that SSL is enabled for the database, open the pg_hba.conf file in an editor to configure the host-based authentication settings. Note that the default location for the pg_hba.conf file is in the postgresql data directory (PGDATA). The location of the pg_hba.conf file for a running EDB postgres instance can be found using the following command run from a command prompt: > psql -d -U -c 'SHOW hba_file' Where is any database in the EDB postgres instance and is a database superuser. By default, a database named 'edb' and a superuser named 'enterprisedb' are installed with EDB Postgres Advanced Server (EPAS). Obtain approval and document any uncommented entries with corresponding justification that are not of type hostssl and do not include the 'clientcert=1' option. For any entries that are not of type hostssl authentication with the 'clientcert=1' option and not documented and approved, change the 'TYPE' column to 'hostssl' and add the 'clientcert=1' authentication method option. Note that changes to the host-based authentication settings require a database reload in order to apply the updated settings.

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