See what Challenge my SSL is Using

Can I tell what challenge my current certificate is using? I am checking a friends server who never entered an email address for updates and i want to make sure he is not using the TLS challenge.

It is using certbot 0.28 and he renewed the certificated about 14 days ago using nginx flag.


Hi @mb1990

check your last (local) protocol:


The certificate does not have informations about the challenge. But the log has.

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