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If I have a self-signed certificate for something.subdomain.example.com then it will not be valid on www.subdomain.example.com, right? (Note that the certificate is self-signed, but imported so it should be trusted)

Is a wildcard certificate the right solution here?

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up vote 1 down vote accepted

That's correct.

Your options are a wildcard certificate or Subject Alternative Names

A wildcard certificate for *.subdomain.example.com is valid for www.subdomain.example.com and other.subdomain.example.com, but NOT www.othersubdomain.example.com, and possibly not for just subdomain.example.com either (unless you also list it as a SAN). It also will not work for www.sub.sub.sub.subdomain.example.com.

Or you can Subject Alternative Name to explicitly list all the subdomains you want it to work for.

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Thank you very much, kind sir. Would vote you up, had I the reputation. –  Sakknekedro Aug 15 '13 at 19:15
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