[Notice] Revoking certain Let’s Encrypt certificates.

Posted: Mar 6, 2020

Let’s encrypt, which issues free SSL/TLS certificates announced that they would revoke certain certificates starting from 00:00 (UTC) on March 4, 2020.

Revoking certain certificates on March 4 – Let’s Encrypt

You can use the checking tool at the following website.
https://checkhost.unboundtest.com/

Please note that you need to delete and re-apply for new certificates if applicable.