Azure DB for PostgreSQL: Hyperscale (Citus) cluster connectivity functionality is in preview
Updated: October 02, 2019
Support for ‘Allow Azure services and resources to access this server group’ functionality in Hyperscale (Citus) clusters is now in preview. This setting allows you to enable all Azure services, such as Power BI and Azure Data Factory, as well as other Azure resources such as VMs, to access their Hyperscale (Citus) cluster. Note that this feature opens the Hyperscale (Citus) cluster firewall to accept connections on port 5432 from any IP allocated to an Azure service or resource, including instances deployed in the Azure subscriptions of other users.
For more information, see Hyperscale (Citus) firewall rules.