I have to ask you a little annoying question.
I am using Rebex Https (R6.0).
We set it to TLS 1.2 and connect with Synology DSM (7.01) WebDAV server.
ProtocolVersion error occurs when set to "Modern Compatibility" in Synology's security settings.
Connection works fine with TLS 1.3.
This is considered normal processing.
However, if you try using curl, you can set it to TLS 1.2.
From curl's request, it seems to be setting Extension: supported_versions.
So it seems to work well by receiving the supported version during Server Hello.
However, Rebex TLS 1.2 does not set Extension: supported_versions.
Can I set this up so that it connects over TLS 1.3?
The goal is TLS 1.2 by default, but I want to automatically connect to TLS 1.3 if TLS 1.2 is not supported.