Menu
Microsoft provides best practices guidance for Transport Layer Security (TLS). This document describes registry keys that can enable or disable a specific protocol.
https://docs.microsoft.com/en-us/dotnet/framework/network-programming/tls#configuring-schannel-protocols-in-the-windows-registry
For example, to enable TLS 1.2, you can add the following registry keys.
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client]
"DisabledByDefault"=dword:00000000
"Enabled"=dword:FFFFFFFF
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server]
"DisabledByDefault"=dword:00000000
"Enabled"=dword:FFFFFFFF
What is the difference between DisabledByDefault and Enabled? They seem redundant.
275
When DisabledByDefault flag is set to 1, SSL / TLS version X is not used by default. If an SSPI app requests to use this version of SSL / TLS, it will be negotiated. In a nutshell, SSL is not disabled when you use DisabledByDefault flag.
Transport Layer Security (TLS) is the successor protocol to SSL. TLS is an improved version of SSL. It works in much the same way as the SSL, using encryption to protect the transfer of data and information. The two terms are often used interchangeably in the industry although SSL is still widely used.
How to check if TLS 1.2 is enabled? If the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client\DisabledByDefault is present, the value should be 0.
1. Click on: Start -> Control Panel -> Internet Options 2. Click on the Advanced tab 3. Scroll to the bottom and check the TLS version described in steps 3 and 4: 4.
When DisabledByDefault flag is set to 1, SSL / TLS version X is not used by default. If an SSPI app requests to use this version of SSL / TLS, it will be negotiated. In a nutshell, SSL is not disabled when you use DisabledByDefault flag.
When Enabled flag is set to 0, SSL / TLS version X is disabled and cannot be nagotiated by any SSPI app (even if DisabledByDefault flag is set to 0).
For more information, Microsoft documentation describes what SSL version is maintained or not, and how to disable it.
139
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
