Create a PostgreSQL 15+ database as a user with permissions on the public schema, and restrict incoming connections to those originating from the PKI Hub host.
To restrict incoming connections on a PostgreSQL database
Edit the following PostgreSQL configuration file.
pg_hba.conf
Add the following line.
host all all <host> scram-sha-256
Where
<host>
is the IP address of the Entrust PKI Hub host.