What are SAN options?

SAN options (Subject Alternative Names) allow you to include multiple domains and subdomains within a single SSL certificate. For example:

Common Name: example.com

Subject Alternative Names (SANs):

• example.com
• www.example.com
• mail.example.com
• example.org
• www.example.org
• mail.example.org
• *.example.com

It is possible to add or remove SANs by reissuing the original MDC (Multi-Domain Certificate).

Wildcard Subdomains

A wildcard SAN (e.g., *.example.com) secures all subdomains at the same level where the wildcard is set. For example:

• *.example.com will secure:
• www.example.com
• mail.example.com
• blog.example.com
• However, it will not secure:
• mail.eu.example.com
• example.com

Note: Wildcard subdomains can be added as SANs in DV and OV MDCs, but not in EV MDCs.