openssl s_client -servername dash.cloudflare.com -connect dash.cloudflare.com:443 < /dev/null 2>/dev/null | openssl x509 -fingerprint -noout -in /dev/stdin SHA1 Fingerprint=23:80:59:61:1E:82:7F:85:96:5F:06:38:D1:7F:C0:19:7C:D1:90:07 #sha256 openssl s_client -servername dash.cloudflare.com -connect dash.cloudflare.com:443 < /dev/null 2>/dev/null | openssl x509 -fingerprint -sha256 -noout -in /dev/stdin sha256 Fingerprint=A8:F7:20:54:02:B2:61:0A:1C:1E:21:D7:64:79:A9:EA:05:7B:AE:BF:11:FD:78:C5:F9:68:BB:EB:F4:7F:69:6A
[1] - https://github.com/drwetter/testssl.sh
[1] - https://github.com/drwetter/testssl.sh