[yuhong]

I know, the goal is to prepare.

[feld]

I'm not sure what you mean then by servers having TLS 1.3 intolerance.

[yuhong]

It does not respond properly to clients trying to negotiate TLS 1.3. It should return a ServerHello showing the supported TLS 1.2 version.

[feld]

I wasn't aware there was a TLS 1.3 PoC that people could use for testing.

[yuhong]

It is as simple as setting the version in the ClientHello message.

[feld]

Oh, I see