TLS PROTOCOLS and Cipher ( to resolve ssl provider error 0 connecting to SQLServer)

Enabled and Disabled SSL/TLS versions are under the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols

There is a Client and Server sub-key for each version of SSL/TLS, with Enabled and Disabled values, e.g.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client] "DisabledByDefault"=dword:00000000 "Enabled"=dword:00000001
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server] "DisabledByDefault"=dword:00000000 "Enabled"=dword:00000001

*** Please note that any non-zero value is take for TRUE. However, 1 is generally preferred over FFFFFFFF (or –1).

You can check the Functions value under following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Cryptography\Configuration\Local\SSL\00010002

References:

0710 SSL Errors after Upgrading to TLS 1.2 · microsoft/CSS_SQL_Networking_Tools Wiki · GitHub

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