WebRequest fails over TLS 1.1 / 1.2 for Windows Server 2008

Question

I\"m running a .net 4.5 application which makes secure outbound requests to an external server supporting only TLS 1.1 and TLS 1.2. All goes fine when i run the application from

Answer 1

I found an indirect proof for you.

SecurityProtocolType Enumeration

Specifies the security protocols that are supported by the Schannel security package.

Support for SSL/TLS protocols on Windows

Now let’s come to the point, on Windows the support for SSL/TLS protocols is tied to the SCHANNEL component. So, if a specific OS version doesn’t support a SSL/TLS version, this means it remains unsupported.

Secure channel compatibility support with SSL and TLS