The Subject Alternative Name field lets you specify additional host names (sites, IP addresses, common names, etc.) Remarks. If you want to create a Certificate Signing Request (CSR) for a Subject Alternative Names (SAN) certificate, you can use the Microsoft Management Console (MMC) to create such a request. In the Name box, type the fully qualified domain name of the domain controller. The Subject Alternative Name extension was a part of the X509 certificate standard before 1999, … I created a template where the Subject Name should be supplied in the request. Your solution would have also have worked great for me. I have no problem creating a certificate without SAN's. What is SAN Certificate? Create a SAN Certificate. This is a standard certificate field. Give a friendly name for the certificate and a description. The subject alternative name extension allows identities to be bound to the subject of the certificate. What if she took that same request file, and re-submitted it? In this article, I’ll show you how to create a new Server Certificate with a Subject Alternative Names which means that the Certificate will have multiple names (DNS names).. Thread Safety ()certReq.Submit(CR_IN_ENCODEANY|CR_IN_FORMATANY,request,sAttributes,CAName ); And the submit is rigth, but when i get the certificate from CA, the subject alternative name not is in the certificate, and so i can't do the logon. X509v3 Subject Alternative Name: DNS:my-project.site and Signature Algorithm: sha256WithRSAEncryption. Thanks in advance. When you request a SAN certificate, you have the option of defining multiple DNS names that the certificate can protect. Background. In Public Certificate Authorities, "Subject Alternate Names" can be used and this can also be done with self signed certificates. These identities may be included in addition to or in place of the identity in the subject field of the certificate. The Subject Alternative Name (SAN) is an extension the X.509 specification. Adding SAN (Subject Alternative Name” into “Additional Attributes” field on a Microsoft Certificate Authority certificate request form does not generate a certificate with a SAN entry A new Windows Server 2008 R2 Enterprise Root Certificate Authority throws the error: “No certificate … thank's for the reply The alternative identity, if one exists, is specified in the subject alternative names extension for the X.509 certificate. openssl x509 -req \ -sha256 \ -days 3650 \ -in private.csr \ -signkey private.key \ -out private.crt \ -extensions req_ext \ -extfile ssl.conf Add the certificate to keychain and trust it: A lot of companies these days are using SAN (Subject Alternative Name) certificates because they can protect multiple domain names using a single certificate. The SubjectAlternativeName property returns the alternative identity associated with the X.509 certificate. Submit the CSR to the CA, now with malicious intent. Download both the files and send the CSR file alone to the certificate authority to get it signed. When using the term ‘multi-domain certificates’, we’re generally referring to an SSL certificate that has the ability to cover multiple host names (domains). The preferred method is to either use the certificates MMC and create a request with the subject and all required SANs defined in the request or to use certreq and an INF file with all SANs defined in the INF file The Subject Alternative Name extension (also called Subject Alternate Name or SAN) was introduced to solve this limitation. Please note -config switch. Remember to add a valid Host + Domain Name for Common Name (CN), should look like www.yoursite.com or yoursite.com. Add Subject Alternative Name to openssl-temp.cnf, under [v3_ca]: [ v3_ca ] subjectAltName = DNS:localhost Replace localhost by the domain for which you want to generate that certificate. Click on Subject tab and add all the hostnames under “Alternative Name“ Under Subject Name, enter the Common Name (CN), Organizational Unit (OU), Organization (O), State (S) and Country (C) values. The Subject Alternative Name Field Explained. to be protected by a single SSL Certificate, such as a Multi-Domain (SAN) or Extend Validation Multi-Domain Certificate.. Background. Same request file as above, but in addition to automatically populating the certificate’s subject alternative name from AD, let’s say we add our own, in the form a CSR request attribute. The subject alternative name extension allows identities to be bound to the subject of the certificate. Click Apply You may have noticed that since Chrome 58, certificates that do not have Subject Alternative name extensions will show as invalid. The use of the SAN extension is standard practice for SSL certificates, and it’s on its way to replacing the use of the common name.. SAN certificates. 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