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Applies to: 
SQL Server
This article describes how to connect to SQL Server through a proxy server in SQL Server by using SQL Server Configuration Manager. To listen remotely by way of Remote WinSock (RWS), define the local address table (LAT) for the proxy server so that the listening node address is outside the range of LAT entries.
Use SQL Server Configuration Manager
Follow the steps in Configure SQL Server to listen on a specific TCP port to determine which TCP/IP ports are used by the Database Engine, or to configure the Database Engine to use a desired port.
In your proxy server, define the local address table (LAT) for the proxy server so that the listening node address is outside the range of LAT entries. For more information, see your proxy server documentation.
Note
This article applies to on-premises SQL Server. For connection issues related to SQL Database, see Troubleshoot connection issues to Azure SQL Database.