Hi Sohi420,
>>Since ADF can connect through a large set of IP addresses, there is no way to specify IP based firewall rules on the system where SQL Server is installed.
According to your description, my understanding is that you can not use firewalls to secure sql server access. If anything is misunderstood, please tell me.
Based on my experience,
it is necessary to secure sql server access by firewalls. For more details, please refer to
https://docs.microsoft.com/en-us/sql/database-engine/configure-windows/configure-a-windows-firewall-for-database-engine-access?view=sql-server-2017
Hope this could help you .
Best regards,
Dedmon Dai
MSDN Community Support
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