How to Configure SSL on PostgreSQL

Configuring PostgreSQL with SSL involves several steps, including:

Generate SSL Certificate

The first step is to generate an SSL certificate that will be used to secure the communication between the client and the server.
This can be done using a tool such as OpenSSL.
For example, to generate a self-signed certificate, you can use the following command:
openssl req -new -x509 -nodes -out server.crt -keyout server.key
This will generate a certificate and a private key file in the current directory.

Configure PostgreSQL Server

The next step is to configure the PostgreSQL server to use SSL.
Open the postgresql.conf file and uncomment the ssl line and set its value to on.
Also, uncomment the ssl_cert_file and ssl_key_file lines and set their values to the paths of the certificate and private key files generated in step 1.
Configure PostgreSQL Client

The PostgreSQL client must also be configured to use SSL to communicate with the server.
Open the pg_hba.conf file and add an entry for SSL connections.
For example:
read more: https://thedbadmin.com/how-to-configure-ssl-on-postgresql/