List of clients affected by disabling TLS-SNI?

Hi all,

I’m planning to work on a summary post today that puts together the various pieces of information in an easily understandable format (thanks @ahaw021 for the idea!). One of the things I’d like to include is a list of clients that are affected. So, for instance, Certbot < 0.21 (using the Nginx or Apache mode) is affected. So is Go’s autocert below a certain version, because it only implemented the TLS-SNI challenge.

If you know of other clients that are broken because TLS-SNI is disabled, could you post them here, along with the version number of a fix if applicable? Thanks!


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