ところで5/4にLet's Encryptの証明書チェーンが切り替わるので一応注意するのじゃ。
https://community.letsencrypt.org/t/production-chain-changes/150739
community.letsencrypt.orgProduction Chain ChangesMany of you have asked for a more simple way to understand the chain changes coming up. We hope this helps and can be a thread we update consistently when more information is available. Always scroll down for the latest posts/information! And note that "end-entity certificate" is another way to say "leaf certificate” or “subscriber certificate”. For certificates with RSA keys Through May 3, 2021 Default chain: End-entity certificate ← R3 ← DST Root CA X3 Alternate chain: End-entity certi...