https://community.letsencrypt.org/t/blocking-some-on-demand-issuance-caused-by-internet-scanning/245553

[mnordhoff@infosec.exchange]

Blocking Some On-Demand Issuance Caused by Internet Scanning

We've noticed a surge in certificate requests for very long domain names (e.g., 10 DNS labels) that we believe are the result of unintended feedback loops between Caddy or autocert and Internet scanning tools. We'll be b…

Let's Encrypt Community Support (community.letsencrypt.org)

Scanners causing problems for people, lovely.