On Azure most data services offer a firewall. Unfortunately, at the moment the details of those firewalls differ. As soon as a firewall is switched on for any storage service (e.g. Azure Data Lake Gen2, Azure Synapse, Azure Key Vault), Azure Data Factory cannot access the resources by default anymore and must be configured accordingly.

In this blog post, I want to demonstrate how to demonstrate how to connect ADF and Synapse pretty securely without going with a full Managed VNet Runtime of ADF which would incur extra cost.