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When you try to connect SQL Server 2017 for Linux on a distribution that has OpenSSL 1.1 configured and OpenSSL 1.0 is not installed, you may receive a connection error message that resembles the following:

A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error:0 - An existing connection was forcibly closed by the remote host.)

For example: When you try to connect with SQLCMD, you may receive the following error messages:

Sqlcmd: Error: Microsoft ODBC Driver 17 for SQL Server : TCP Provider: Error code 0x2746.

Sqlcmd: Error: Microsoft ODBC Driver 17 for SQL Server : Client unable to establish connection. 

Note: An example of Linux distribution which comes with OpenSSL 1.1 and without OpenSSL 1.0 installed is Red Hat Enterprise Linux 8.0.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


This issue is fixed in the following cumulative update for SQL Server:

About cumulative updates for SQL Server:

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:


Learn about the terminology that Microsoft uses to describe software updates.

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