IIS 7 and Above
Application Request Routing (ARR)
Can not connect to Azure Db when web server behind Proxy Server
Re: Can not connect to Azure Db when web server behind Proxy Server
Mar 14, 2019 02:17 AM|Jalpa Panchal|LINK
Hi Nadir Husain,
Firewall systems help prevent unauthorized access to computer resources. If a firewall is turned on but not correctly configured, attempts to connect to SQL Server might be blocked.
To access an instance of the SQL Server through a firewall, you must configure the firewall on the computer that is running SQL Server.
Try to configure firewall to allow access sql server port 1433.
You could refer below article:
Configure the Windows Firewall to Allow SQL Server Access