Re: WinSCP transfers fail with Windows Server IIS FTP+TLS
I was testing this only to find that IIS does not support TLS 1.1 and TLS 1.2 by default. One has to enable this in registry (<invalid hyperlink removed by admin>). They probably know why they do not enable this by default...
Just a note for people who find their way here wondering why MS did this.
MS intentionally disabled TLS 1.1 and 1.2 by default because most browsers didn't have TLS 1.1 or 1.2 enabled, and they wouldn't fall back to TLS 1.0 right. Specifically, Firefox (<invalid hyperlink removed by admin>) didn't enable TLS 1.1 and 1.2 until at least version 24 (August 2013) and in version 23 even if you enabled it it would not fall back to TLS 1.0 from TLS 1.1 or higher. As I recall this wasn't unique behavior for Firefox, either.