Multi-Domain (SAN) certificates: will "www.domain.com" and "domain.com" count as two SAN entries?

When using multi-domain SSL certificates www and non-www versions of the domain name are considered to be different domain names, and will require separate SAN (addon) slots in the certificate.

However, when using GeoTrust/Symantec/Thawte certificates you can get a free SAN of domain.com if the Common Name of the SSL is www.domain.com, so the non-www version of the common name will be secured by the SSL for free.

SAN Example for COMODO PositiveSSL Multi-Domain:

CSR Slot #1: www.domain1.com

SAN Slot #2: domain1.com

SAN Slot #3: abc.domain1.com

SAN Slot #4: xyz.domain1.com

SAN Slot #5: www.domain2.com

SAN Slot #6: domain2.com


SAN Example for GEOTRUST True BusinessID:

CSR Slot #1: www.domain1.com           

(as this is the main domain and www.domain1.com was specifiec inside CSR, domain1.com will automatically be included for GEOTRUST True BusinessID!)

SAN Slot #2: abc.domain1.com

SAN Slot #3: xyz.domain1.com

SAN Slot #4: www.domain2.com

SAN Slot #5: domain2.com


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