>echo | openssl s_client -showcerts -servername weatherstation.wunderground.com -connect weatherstation.wunderground.com:443 2>/dev/null | openssl x509 -text | grep -A9 -m 1 CertificateCertificate:Data:Version: 3 (0x2)Serial Number:11:21:e6:fe:2c:40:75:75:4b:95:4a:bf:f0:86:35:80:d4:19Signature Algorithm: sha256WithRSAEncryptionIssuer: C = BE, O = GlobalSign nv-sa, CN = GlobalSign Organization Validation CA - SHA256 - G2ValidityNot Before: Oct 28 18:06:03 2014 GMTNot After : Sep 15 18:25:18 2019 GMT <-- Slow clap IBM :(
Subject: C = US, ST = Georgia, L = Atlanta, O = The Weather Channel LLC, CN = *.wunderground.com
Certificate:Data:Version: 3 (0x2)Serial Number:
0f:ae:6c:0b:ff:46:de:04:28:1a:60:86:2c:b4:ff:a9 <-- totally different serialSignature Algorithm: sha256WithRSAEncryptionIssuer: C = US, O = DigiCert Inc, CN = DigiCert SHA2 Secure Server CAValidityNot Before: Aug 21 00:00:00 2019 GMTNot After : Aug 25 12:00:00 2021 GMTSubject: C = US, ST = Georgia, L = Atlanta, O = "The Weather Company, LLC", CN = *.wunderground.com