TLS1.3 is it supported?

Jannick Hald 21 Reputation points
2020-08-11T05:53:23.29+00:00

Hi everyone,
Is TLS1.3 supported in IIS on Windows Server 2016?

I'm unable to find any documentation where it says if it is or not.

Windows Server 2016
Windows Server 2016
A Microsoft server operating system that supports enterprise-level management updated to data storage.
2,416 questions
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Accepted answer
  1. Leon Laude 85,701 Reputation points
    2020-08-11T06:40:12.757+00:00

    Hi,

    TLS 1.3 is not yet available yet for any version of Windows Server, keep track of the link below, once support will be made available the link will be updated.

    Protocols in TLS/SSL (Schannel SSP)
    https://learn.microsoft.com/en-us/windows/win32/secauthn/protocols-in-tls-ssl--schannel-ssp-

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    (If the reply was helpful please don't forget to accept as answer, thank you)

    Best regards,
    Leon

    2 people found this answer helpful.

3 additional answers

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  1. Carl Fan 6,836 Reputation points
    2020-08-11T07:41:15.327+00:00

    Hello,
    IIS rely on Schannel. However, no windows server version has supported TLS 1.3 in schannel.
    https://en.wikipedia.org/wiki/Transport_Layer_Security#TLS_1.3
    Based on my search, TLS 1.3 is still in Draft and there is no expected release date as of now.
    Best Regards,
    Carl

    1 person found this answer helpful.

  2. levicki 16 Reputation points
    2020-09-01T16:05:53.293+00:00

    The link posted above as something to rely on is 404.

    Initial implementation of TLS 1.3 (unfit for production use) is already available from Windows 10 Version 1903, however it seems to be broken (WinHttpSendRequest returns error 0x80072f8f with TLS 1.3, works fine with TLS 1.2).

    The lack of progress and the lack of clear communication from Microsoft on when TLS 1.3 is going to be fully supported in SCHANNEL which is used by a lot of system and 3rd party libraries (winhttp and curl to name just a few), browsers, development platforms such as .Net Framework, and IIS web server itself is really appaling.


  3. MukeshAgarwal-MSFTE 0 Reputation points
    2023-07-14T08:32:12.2+00:00

    TLS1.3 is the latest TLS technology and it is only supported in Windows11 and Windows server 2022 and onwards.

    Windows OS TLS 1.0 Client TLS 1.0 Server TLS 1.1 Client TLS 1.1 Server TLS 1.2 Client TLS 1.2 Server TLS 1.3 Client TLS 1.3 Server
    Windows 8/Windows Server 2012 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
    Windows 8.1/Windows Server 2012 R2 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
    Windows 10, version 1607/Windows Server 2016 Standard Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
    Windows 10, version 1809//Windows Server 2019 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
    Windows Server 2022 Enabled Enabled Enabled Enabled Enabled Enabled Enabled Enabled
    Windows 11 Enabled Enabled Enabled Enabled Enabled Enabled Enabled Enabled

     

    More informations in the article below-

    https://learn.microsoft.com/en-us/windows/win32/secauthn/protocols-in-tls-ssl--schannel-ssp-

     

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