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Subject Alternative Name (SAN) SSL Certificates

Subject Alternative Name (SAN) SSL certificates are also commonly called Unified Communications (UC) certificates.

Standard SSL certificates can be used with one hostname. UC certificates are generally used with Microsoft Exchange Server 2007 and 2010, however they can be used with any web server type to secure multiple, distinct hostnames with one certificate using the certificate “Subject Alternate Name” field.

The certificate Subject Alternative Name field allows you to create a certificate that is valid for multiple hostnames, including both internal system names and externally resolvable domain names.

What can you do with Subject Alternative Names?

  1. Secure host names on different base domains in one SSL Certificate. A wildcard certificate can protect all first-level subdomains on an entire domain, such as * But a wildcard cannot protect both and
  2. Host Multiple SSL sites on a single IP address. Hosting multiple SSL-enabled sites on a single server typically requires a unique IP address per site, but a certificate with Subject Alternative Names can solve this problem. Microsoft IIS 6 and Apache are both able to host multiple HTTPS sites using SAN certificates also known as Unified Communications SSL.
  3. Greatly simplify your Exchange Server 2007 SSL configuration. Using a SAN certificate saves you the hassle and time involved in configuring multiple IP addresses on your Exchange 2007 server, binding each IP address to a different certificate, and running a lot of low level PowerShell commands just to piece it all together.

Where can you see Subject Alternative Names in action?

To see an example of Subject Alternative Names, click the padlock in your browser to examine our SSL certificate. In the certificate details you will find a Subject Alternative Name extension that lists any Subject Alternative Names.

ProductValidationDeliveryEncryption StrengthSite SealWildcardAdd'l DomainsGreen AddressbarWarrantySecurity Scan
Comodo Multi-Domain EV SSLExtended1-7 days128/256-bitnono3yesn/ayes
Comodo Multi-Domain SSLOrganization1-2 days128/256-bitnono3non/ayes
Comodo Multi-Domain Wildcard SSLDomain5 minutes128/256-bitnoyes3non/ayes
Comodo PositiveSSL UCC/SANDomain3 minutes128/256-bityesno3no$10,000yes
Comodo UCC/SAN DVDomain5 minutes128/256-bitnono3no$50,000yes
Comodo UCC/SAN OVOrganization1-2 days128/256-bitnono3no$50,000yes
GeoTrust True BusinessID SANOrganization2-3 days256-bityesno5no$100,000no
GeoTrust True BusinessID SAN EVExtended2-10 days256-bityesno5yes$500,000no
Symantec Secure SiteOrganization2-3 Days40/256-bityesnomax 20no$1,000,000yes
Symantec Secure Site EVExtended5 days40/256-bityesnowwwyes$1,500,000yes
Symantec Secure Site ProOrganization2-3 Days128/256-bityesnomax 20no$1,250,000yes
Symantec Secure Site Pro EVExtended5 days128/256-bityesnowwwyes$1,500,000yes
Thawte SGC SuperCertsOrganization2-3 days128/256-bityesnomax 20no$500,000no
Thawte Web Server SAN CertificateOrganization2-3 days256-bityesnomax 20no$250,000no
Thawte Web Server SAN EV CertificateExtended2-10 days256-bityesnomax 20yes$750,000no

Product1 Year2 Years3 Years4 Years5 YearsAdd'l Domains 
Comodo Multi-Domain EV SSL$206.49$361.13$71.44Order Now
Comodo Multi-Domain SSL$82.78$144.64$206.49$24.02Order Now
Comodo Multi-Domain Wildcard SSL$124.02$216.80$309.59$35.36Order Now
Comodo PositiveSSL UCC/SAN$46.70$80.72$115.77$150.82$192.06$12.68Order Now
Comodo UCC/SAN DV$82.78$144.64$206.49$20.93Order Now
Comodo UCC/SAN OV$82.78$144.64$206.49$20.93Order Now
GeoTrust True BusinessID SAN$175.57$306.49$438.45$569.38$17.84Order Now
GeoTrust True BusinessID SAN EV$288.97$505.46$37.42Order Now
Symantec Secure Site$283.81$496.19$708.56$227.11Order Now
Symantec Secure Site EV$670.41$1,172.47$577.63Order Now
Symantec Secure Site Pro$680.72$1,191.03$1,701.34$597.22Order Now
Symantec Secure Site Pro EV$979.69$1,713.71$876.60Order Now
Thawte SGC SuperCerts$139.48$243.61$347.73$451.86$126.08Order Now
Thawte Web Server SAN Certificate$74.54$130.21$185.88$241.55$72.47Order Now
Thawte Web Server SAN EV Certificate$152.89$267.32$139.48Order Now

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