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I have certificate issued to * It has * as a SAN.

Can this be used for or should * be added to * as a SAN?

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up vote 4 down vote accepted

Wildcards only apply to a single DNS label. So * would only support, but not So for 2nd level sub-domains you'd need a wildcard at the 1st subdomain level (*

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Thanks! Is this information available online somewhere? – Sam Aug 22 '12 at 2:25
@Sam It's all enclosed in RFC4592 if you wish to dig through it. That applies to DNS, but the SAN inherits the 'leftmost label' constraint. – sysadmin1138 Aug 22 '12 at 2:28
Thanks a lot for the link! – Sam Aug 22 '12 at 2:32

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