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by feld 4217 days ago
I'm not sure what you mean then by servers having TLS 1.3 intolerance.
1 comments

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.
I wasn't aware there was a TLS 1.3 PoC that people could use for testing.
It is as simple as setting the version in the ClientHello message.
Oh, I see