Tuesday, June 11, 2024

Get remote openssl Certificate Information

$ openssl s_client -showcerts -servername example.com -connect example.com:443 </dev/null | openssl x509 -noout -dates -in -

...

notBefore=Feb 22 18:00:59 2024 GMT

notAfter=Feb 21 18:00:59 2026 GMT

Monday, June 10, 2024