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Can anyone please tell me, we have an SSL certificate for *.example.com but now we need separate SSL certificate for abc.example.com only for one subdomain. Is it possible? *.example.com which is wildcard.. So the original wildcard would be revoked if we purchased wildcard for subdomain? we want to host our career page to third party like (jobdiva) and they are asking for Intermediate CA, Private Key, Security certificate but I don't want to share my SSL of *.example.com thats'why I want an SSL for Subdomin. One more thing Can someone guide me how to get free SSL certificate for subdomain?

that would be great help

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  • I expect that you can have certificates issued from different intermediate authorities without conflict (unless clients use certificate pinning for your domains). LetsEncrypt provides instructions on getting a free certificate: letsencrypt.org/getting-started
    – James T
    Commented May 13, 2021 at 19:06

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Getting an SSL certificate for a specific subdomain wouldn't revoke an instance of a wildcard certificate for your domain. It would need to be a separate certificate though. (Same provider if you like, but separate certificate nonetheless)

The usual place now to get a free certificate is LetsEncrypt. There are many guides and tools to help you get a free certificate. Just treat your subdomain as being a "domain" and all will work just fine. The number of dots in a domain name isn't relevant to it being a domain name or subdomain name; the label simply implies ownership. Best in mind that LE certificates expect to be renewed monthly, and expire after three months unless renewed.

If your provider supports the use of LE certificates it should be very straightforward to get one allocated to your subdomain. (If they don't, ask them why not!)

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  • Thank you for your answer, much appreciated. But I am little bit confused that I want to host my career page to a third party website that is jobdiva so in my case jobdiva would be subdomain?
    – Sidra Siddique
    Commented May 7, 2021 at 13:25
  • You said you wanted abc.example.com to be the subdomain, given example.com as your main domain (and *.example.com as the wildcard ssl certificate)
    – Chris Davies
    Commented May 7, 2021 at 14:09
  • Reissuance of Certificate would be helpful?
    – Sidra Siddique
    Commented May 7, 2021 at 19:31
  • What about reissuing a certificate? Your wildcard certificate? If so, why would you want to do that?
    – Chris Davies
    Commented May 7, 2021 at 20:30
  • Someone told me that , the best solution would be to reissue the wildcard certificate with a CSR generated on the third party's server, and then provide them with the SSL certificate files generated from the newer CSR.
    – Sidra Siddique
    Commented May 7, 2021 at 20:57

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