SQL Server can support different TLS (Transport Layer Security) versions across various editions. The TLS versions supported by SQL Server may vary depending on the SQL Server version and the Windows operating system in use.
In general, SQL Server 2008 and later versions typically support TLS 1.0, TLS 1.1, and TLS 1.2. However, it’s essential to obtain the most up-to-date information from Microsoft’s official sources, as security updates and patch releases are primarily designed to address security vulnerabilities.
Below is a table illustrating the commonly supported TLS versions. Keep in mind that this information may change over time:
| SQL Server Version | Min. TLS Version | Max. TLS Version |
|---|---|---|
| SQL Server 2008 | TLS 1.0 | TLS 1.2 |
| SQL Server 2008 R2 | TLS 1.0 | TLS 1.2 |
| SQL Server 2012 | TLS 1.0 | TLS 1.2 |
| SQL Server 2014 | TLS 1.0 | TLS 1.2 |
| SQL Server 2016 | TLS 1.0 | TLS 1.2 |
| SQL Server 2017 | TLS 1.0 | TLS 1.2 |
| SQL Server 2019 | TLS 1.2 | TLS 1.3* |
* SQL Server 2019 may support TLS 1.3, but this is contingent on the operating system and configuration.
From a security perspective, it is recommended to use the latest version of SQL Server and keep the operating system up to date. Additionally, avoiding the use of unsupported TLS versions is crucial to prevent potential security vulnerabilities.
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