SSL/TLS errors on very old browsers connecting to Discourse

You can test your site using the SSL Server Test. The test results contain a section named “Handshake Simulation” which should show you browser/OS combinations that work / do not work.

With the latest Docker image I’m seeing the following TLS configuration:

You can send your users to Qualys SSL Labs - Projects / SSL Client Test in order to get more information about their browser and OS versions as well as supported TLS versions.

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