SSL証明書更新のためのcertbot-autoでのドメイン認証、ドメインの認証に５回失敗すると制限がかかるようです。
$ sudo certbot-auto renew で全ドメイン更新していて、間違いから認証失敗してしまい・・
Attempting to renew cert (example.com) from /etc/letsencrypt/renewal/example.com.conf produced an unexpected error: urn:ietf:params:acme:error:rateLimited :: There were too many requests of a given type :: too many failed authorizations (5) for “example.com” in the last 1h0m0s, retry after 2024-09-30 02:26:48 UTC: see https://letsencrypt.org/docs/failed-validation-limit/. Skipping.
