I'm trying to enable TLS 1.2 for outgoing connections from a classic ASP site running on IIS. I have tried adding the registry settings outlined in the questions below but this hasn't helped.
Check if Windows Server 2008R2 can use TLS 1.2
How do I disable TLS 1.0 without breaking my IIS/ASP.NET websites?
The app pool for this site has Enable 32-bit applications set to True. I noticed that if I create a new site and set Enable 32-bit applications to False then outbound traffic from the test site uses TLS 1.2.
Best Answer
Windows Server 2008 requires an update to enable support for TLS 1.1/1/2:
https://support.microsoft.com/en-us/help/4019276/update-to-add-support-for-tls-1-1-and-tls-1-2-in-windows
RDS support for TLS 1.1/1.2 Windows 2008 R1 SP2
https://support.microsoft.com/en-us/help/4074621/add-rds-support-for-tls-1-1-and-tls-1-2-in-windows-server-2008-sp2