https://nmap.org/nsedoc/scripts/tls-alpn.html
tls-alpn NSE script — Nmap Scripting Engine documentation
How to use the tls-alpn NSE script: examples, script-args, and references.
nmap scripting enginetls alpn
https://letsencrypt.org/tlsalpnrevocation/
Download affected certificate serials for 2022.01.25 TLS-ALPN-01 Incident - Let's Encrypt
Update, April 26 2022 We have shut down and removed the configuration and files that powered this web tool. This document will remain as a historical marker....
affected certificate serials