Monday, April 20, 2015

How to check SSL Certificate information from a Linux server?

-bash-3.2# echo | openssl s_client -connect starcat:443 2>/dev/null | openssl x509 -noout -issuer -subject -dates 
issuer= /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert SHA2 High Assurance Server CA
subject= /C=US/ST=California/L=Santa Clara/O=ABC Company, Inc./CN=*.abc.com
notBefore=Dec  9 00:00:00 2013 GMT
notAfter=Feb 23 12:00:00 2017 GMT


-bash-3.2# echo | openssl s_client -connect unix:443 2>/dev/null | openssl x509 -noout -issuer -subject -dates 
issuer= /C=US/O=DigiCert Inc/OU=www.digicert.com/CN=DigiCert SHA2 High Assurance Server CA
subject= /C=US/ST=California/L=Santa Clara/O=ABC Company, Inc./CN=*.abc.com
notBefore=Dec  9 00:00:00 2013 GMT
notAfter=Feb 23 12:00:00 2017 GMT

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