Protocols in TLS/SSL (Schannel SSP)

The Schannel SSP implements versions of the TLS, DTLS and SSL protocols. Different Windows versions support different protocol versions.

TLS protocol version support

The following table displays the Microsoft Schannel Provider support of TLS protocol versions.

Tip

You may need to scroll horizontally to view all columns in the table.

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 Vista/Windows Server 2008 Enabled Enabled Not supported Not supported Not supported Not supported Not supported Not supported
Windows Server 2008 with Service Pack 2 (SP2) Enabled Enabled Disabled Disabled Disabled Disabled Not supported Not supported
Windows 7/Windows Server 2008 R2 Enabled Enabled Disabled Disabled Disabled Disabled Not supported Not supported
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 1507 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
Windows 10, version 1511 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 1703 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
Windows 10, version 1709 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
Windows 10, version 1803 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 10, version 1903 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
Windows 10, version 1909 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
Windows 10, version 2004 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
Windows 10, version 20H2 Enabled Enabled Enabled Enabled Enabled Enabled Not supported Not supported
Windows 10, version 21H1 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

DTLS protocol version support

The following lists the Microsoft Schannel Provider support of DTLS protocol versions.

Tip: you may need to scroll horizontally to view all columns in this table:

Windows OS DTLS 1.0 Client DTLS 1.0 Server DTLS 1.2 Client DTLS 1.2 Server
Windows Vista/Windows Server 2008 Not supported Not supported Not supported Not supported
Windows Server 2008 with SP2 Not supported Not supported Not supported Not supported
Windows 7/Windows Server 2008 R2 Enabled Enabled Not supported Not supported
Windows 8/Windows Server 2012 Enabled Enabled Not supported Not supported
Windows 8.1/Windows Server 2012 R2 Enabled Enabled Not supported Not supported
Windows 10, version 1507 Enabled Enabled Not supported Not supported
Windows 10, version 1511 Enabled Enabled Not supported Not supported
Windows 10, version 1607/Windows Server 2016 Standard Enabled Enabled Enabled Enabled
Windows 10, version 1703 Enabled Enabled Enabled Enabled
Windows 10, version 1803 Enabled Enabled Enabled Enabled
Windows 10, version 1809 Enabled Enabled Enabled Enabled
Windows 10, version 1903 Enabled Enabled Enabled Enabled
Windows 10, version 1909 Enabled Enabled Enabled Enabled
Windows 10, version 2004 Enabled Enabled Enabled Enabled
Windows 10, version 20H2 Enabled Enabled Enabled Enabled
Windows 10, version 21H1 Enabled Enabled Enabled Enabled
Windows Server 2022 Enabled Enabled Enabled Enabled
Windows 11 Enabled Enabled Enabled Enabled

Pre-TLS standard protocols support

The following lists the Microsoft Schannel Provider support of pre-TLS standard protocols:

Tip: you may need to scroll horizontally to view all columns in this table:

Windows OS PCT 1.0 SSL2 Client SSL2 Server SSL3 Client SSL3 Server
Windows Vista/Windows Server 2008 Not supported Disabled Enabled Enabled Enabled
Windows Server 2008 with SP2 Not supported Disabled Enabled Enabled Enabled
Windows 7/Windows Server 2008 R2 Not supported Disabled Enabled Enabled Enabled
Windows 8/Windows Server 2012 Not supported Disabled Disabled Enabled Enabled
Windows 8.1/Windows Server 2012 R2 Not supported Disabled Disabled Enabled Enabled
Windows 10, version 1507 Not supported Disabled Disabled Enabled Enabled
Windows 10, version 1511 Not supported Disabled Disabled Enabled Enabled
Windows 10, version 1607/Windows Server 2016 Standard Not supported Not supported Not supported Disabled Disabled
Windows 10, version 1703 Not supported Not supported Not supported Disabled Disabled
Windows 10, version 1803 Not supported Not supported Not supported Disabled Disabled
Windows 10, version 1809 Not supported Not supported Not supported Disabled Disabled
Windows 10, version 1903 Not supported Not supported Not supported Disabled Disabled
Windows 10, version 1909 Not supported Not supported Not supported Disabled Disabled
Windows 10, version 2004 Not supported Not supported Not supported Disabled Disabled
Windows 10, version 20H2 Not supported Not supported Not supported Disabled Disabled
Windows 10, version 21H1 Not supported Not supported Not supported Disabled Disabled
Windows Server 2022 Not supported Not supported Not supported Disabled Disabled
Windows 11 Not supported Not supported Not supported Disabled Disabled

Important

Beginning with Windows 10, version 1607 and Windows Server 2016, SSL 2.0 has been removed and is no longer supported.

Tip

All versions of Windows will accept a unified format "ClientHello" message even when SSL version 2 is disabled or no longer supported.