ssl - .Net Framework 4.6.1 not defaulting to TLS 1.2

Question

Our client have recently upgrade the security protocol to TLS 1.2. Therefore We have our application upgraded to 4.6.1 expecting the security protocol will be default to TLS 1.2 but it is not. Any idea why?

Answer 1

I had a similar problem and this is what worked for me.

1. open Powershell and check for supported protocols by using [Net.ServicePointManager]::SecurityProtocol

2. Run the following 2 cmdlets to set .NET Framework strong cryptography registry keys:

   set strong cryptography on 64 bit .Net Framework (version 4 and above)

   Set-ItemProperty -Path 'HKLM:SOFTWAREWow6432NodeMicrosoft.NetFrameworkv4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord

   set strong cryptography on 32 bit .Net Framework (version 4 and above)

   Set-ItemProperty -Path 'HKLM:SOFTWAREMicrosoft.NetFrameworkv4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord

3. Restart Powershell and check again for supported protocol by using [Net.ServicePointManager]::SecurityProtocol

It should now display Tls12 as well.

Hope this helps