Azure Private Link support for Azure Database for PostgreSQL Single server is now available in preview. Private link enables you to connect to your PostgreSQL server via a private endpoint. Use it to establish cross-premises access to the private endpoint using ExpressRoute, private peering, or VPN tunneling, or you can choose to disable all access via public endpoint. If you don't have already have an Azure subscription, create a free account before you begin.
Learn more about it in our documentation.
Read more about it on Azure blogs.