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How to verify SSL certificates with OpenSSL on Command Line

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How to verify SSL certificates with SNI (Server Name Indication) using OpenSSL ... Using SNI with OpenSSL is easy. Just add the -servername flag and you are good ... Home Solutions Enteryoursearchtermhere... Search Newsupportticket Checkticketstatus Solutionhome VPS HowtoforLinuxVPS HowtoverifySSLcertificateswithOpenSSLonCommandLine Print Modifiedon:Thu,21Oct,2021at1:46PM TomakesurethatyouhaveinstalledtheSSLcertificatecorrectly,wehavehavecompiledacheatsheetwithOpenSSLcommandstoverifythatmultipleprotocolsusethecorrectcertificate.Enterthedomainyouwanttocheckhere:{INPUT:servername|server.yourwebhoster.eu} Yourdomainwillgetupdatedinthecommandsbelow.TestFTPcertificateopenssls_client-connect{VAR:servername}:21-starttlsftpTestPOP3certificateopenssls_client-connect{VAR:servername}:995TestIMAPcertificateopenssls_client-connect{VAR:servername}:993TestSMTPSSLcertificateopenssls_client-connect{VAR:servername}:465TestSMTPTLScertificateopenssls_client-connect{VAR:servername}:587-starttlssmtpTestHTTPScertificateopenssls_client-connect{VAR:servername}:443TestDirectAdmincertificateopenssls_client-connect{VAR:servername}:2222Tip:Addthefollowingtoextractthecertificateexpirydatefromtheserver.2>/dev/null|opensslx509-noout-datesHowtoverifySSLcertificateswithSNI(ServerNameIndication)usingOpenSSLUsingSNIwithOpenSSLiseasy.Justaddthe-servernameflagandyouaregoodtogo.Replaceintheexamplesbelowmail.domain.comwiththeSNIname.Note:youcanalsousetheSNInametoreplaceserver.yourwebhoster.euwith.TestFTPcertificateopenssls_client-connect{VAR:servername}:21-starttlsftp-servername{VAR:servername}TestPOP3certificateopenssls_client-connect{VAR:servername}:995-servername{VAR:servername}TestIMAPcertificateopenssls_client-connect{VAR:servername}:993-servername{VAR:servername}TestSMTPSSLcertificateopenssls_client-connect{VAR:servername}:465-servername{VAR:servername}TestSMTPTLScertificateopenssls_client-connect{VAR:servername}:587-starttlssmtp-servername{VAR:servername}TestHTTPScertificateopenssls_client-connect{VAR:servername}:443-servername{VAR:servername}TestDirectAdmincertificateopenssls_client-connect{VAR:servername}u:2222-servername{VAR:servername} Didyoufindithelpful? Yes NoSendfeedback Sorrywecouldn'tbehelpful.Helpusimprovethisarticlewithyourfeedback. RelatedArticles HelpDeskSoftware byFreshdeskSupportDesk

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