Retail POS, SQL 2008 R2, and TLS 1.2

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Posted on by Daniel Zook

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Hi,

Has anyone had any luck getting the EPOS client to work (2012 R2) when older security protocols are disabled on the Windows client? When we force the Windows client to use TLS 1.2 only, it fails to connect to the database server with this error in the Application log:

LSRetailPosis.POS.Program: System.ComponentModel.Win32Exception (0x80004005): The client and server cannot communicate, because they do not possess a common algorithm.

Even after installing patches from Microsoft that are supposed to enable TLS 1.2 for SQL Server 2008 R2.

Any suggestions would be greatly appreciated.

Thanks in advance.

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Daniel Zook 847 on at

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I eventually discovered that my SQL build was not high enough. I thought I had installed all the necessary patches, but in fact I had not.

First build that supports TLS 1.2 on SQL Server 2008 R2 SP3 is 10.50.6542.0. You can get the link to download the hotfix here: https://support.microsoft.com/en-us/help/3135244/tls-1-2-support-for-microsoft-sql-server

Once that is installed, and the host has been restarted, clients that are configured to require TLS 1.2 will be able to connect again.

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