Until now, we relied on the ssllabs test https://www.ssllabs.com/ssltest/analyze.html?d=devcentral.nasqueron.org&latest with a "A" result.

Yet, Mastodon relies on tls.imirhil.fr and…
https://tls.imirhil.fr/https/dwellers.nasqueron.org gives a F score per DES3.