HP 250m Print Server for Fast Ethernet, 250m Print Server - Fast Ethernet manual SubjectAltName

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Figure 39 - SubjectAltName

Notice how there isn’t even a Common Name in the LDAP server’s certificate. If you remember, we tried connecting to the LDAP server using the IP address of 192.168.0.1 and it failed. When we switched to w2003.example.internal, it passed. We can now see why. A name check was done between the FQDN specified for the LDAP server and the SubjectAlternativeName of a type of dNSName whose syntax is very well known. The SubjectAlternativeName can contain multiple dNSNames and it can contain IP Addresses as well. As time goes on, the SubjectAlternativeName will be used more and more since its syntax better understood than the Common Name, at least for HTTPS. From RFC2818 which describes HTTP over TLS:”If a subjectAltName extension of type dNSName is present, that MUST be used as the identity. Otherwise, the (most specific) Common Name field in the Subject field of the certificate MUST be used. Although the use of the Common Name is existing practice, it is deprecated and Certification Authorities are encouraged to use the dNSName instead.”

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Contents Introduction WhitepaperHttp Application What is SSL/TLS?Application Changes Https DecodedHttp Session More Info Https Session Lock Icon Certificate Details IE6 Security Alert Digital CertificatesIE7 Certificate Error IE7 Certificate Error Certificate Information Public Key Infrastructure and Public Key Certificate BasicsSymmetric Cryptography Asymmetric Cryptography Digital Signature Digital Signature Verification Certificate Authority Public Key Certificates Self-Signed Certificate SSL/TLS Protocol Structures SSL/TLS Protocol BasicsClient Hello Server Hello Server Certificate Verification Keying Material Client Finished Server Finished Using Https with HP JetdirectCA Heirarchy Network Diagram Page Page Under the heading Jetdirect Certificate, press Configure… Page Page Page Page Page Page Page Page Page Page Page Save it Go to Tools and click Internet Options Click Certificates Click Import… Click Next Select the file Click Next Page Page Page Page Page Detailed Look at the SSL/TLS Connection Page Page Page Page Check for server certificate revocation is not selected Page Page SSL/TLS Server Settings HP Jetdirect as an SSL/TLS Client Page Page Page Page Select R2 and hit Export… Click Next Select DER. Click Next Save it Save it Click Finish Page Select the file. Click Finish Click OK Page Same message. What did we do wrong? Page Page We use the DNS name and try again Success Page CA Hierarchy SSL/TLS Client Understanding Certificate ChainsPage RootCA Incorrect HP Jetdirect CA Configuration Correct HP Jetdirect CA Configuration Walking the Chain SSL/TLS Client Certificates and Name Verification Subject SubjectAltName Page Page Page IPP over SSL/TLS Click Next Select a network printer… Page Page Print a test Yep we have our print data protected by SSL/TLS Embedded Devices and Digital Certificates HP Jetdirect Certificate GuidelinesSummary Which HP Jetdirect Products Support SSL/TLS?