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Caveat: I'm a developer by trade (so please use small words).

A vendor hosts a secure site for us that is branded with our name/domain, Since original setup we've purchased a wildcard cert for * As I understand it, the basic process for renewing the cert is:

  1. Vendor generates CSR from each server.
  2. We receive a cert based on each CSR for each server from our certification authority.
  3. Vendor installs each cert.

Our vendor (we are an IIS shop/they use Apache) is telling us that we must buy (renew) the specific and they can't install a cert that's been generated against * Is there any truth to this that my network engineers and I are missing?

Update Under the category of information I could've used in advance, apparently they have some IBM application that prevents use of a wildcard cert. What it does or how it goes about it, I have no idea.


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up vote 9 down vote accepted

That's not correct.

A wildcard certificate has nothing to do with being able to generate certificates; it is a single certificate that will authenticate all subdomains of the CN the certificate refers to.

So if you purchased a wildcard certificate for *, that means the web server that runs can use that certificate.

CSRs don't enter into it, as those are used to request a hostname-specific certificate, which you don't want to use.

Replace the orders certificate with the wildcard one.

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I had every reason to believe what you've confirmed. Thank you. – John Spiegel Jan 11 '13 at 16:16
It is possible to have a single cert ( ) and a wildcard ( * ). This is especially important if you want to use *, but have a 3rd party host your shop ( ) or your cdn ( ) or statistics ( ). – becomingwisest Jan 11 '13 at 19:49

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