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Convert Enterprise Root CA to Standalone Root CA and create new Subordinate CAs

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  • Convert Enterprise Root CA to Standalone Root CA and create new Subordinate CAs

    Hi, my existing setup is/was simple. Had a single site active directory for 30 users and an exchange server.

    All computer workstation identification certs were pushed out via autoenrollment and as such they trust the root CA which was the one to issue the certificates.

    As i will now have a number of sites i think it would be prudent to have subordinate CAs at each remote location to issue certificates there.

    My question is, how would this affect the current computers having the existing CA where it is directly issued from the enterprise root, compared to other computers who were issued via the subordinate CA when i get them running? Im guessing not much, since all computers will trust the root anyway through thet certificate tree? Only down side is if the root got comprimised in this scenario since they would still trust it.

    To aid my understanding, do enterprise root CA issue certificates to workstations by default? Im guessing not, since i had to create a workstation identification template.

    How could i ensure in future that the root CA only issues certificates for other subordinate CA's and NOT workstations? Would this be through the certificate management mmc console? Is this controlled by active directory GPO or some other setting?

    What is the purpose of having a root enterprise CA and subordinate enterprise CA? I cant see much benefit and indeedd maybe this is less secure as the root is online... this is fine for small networks but i have found may no longer be ideal for me.

    Can active directory automatically publish the revocation list to http for it to check? Do i need to have IIS running on the server? I see the url for revocation checking but when i type it in in my browser i get a blank page again i presume because IIS is not running.

    Finally, given the site links are expanding, Is it possible to move my existing enterprise root CA to a standalone root CA, and then create multiple subordinate CAs to issue certs on the clients behalf? This would be the ideal setup as a managed upgrading process. Can i move the root enterprise CA to an offline root CA?

    Many thanks in advance,

    Chris

  • #2
    Re: Convert Enterprise Root CA to Standalone Root CA and create new Subordinate CAs

    It's recommended to have Enterprize root CA offline....

    http://technet2.microsoft.com/window...086af1033.mspx

    Regards,
    Kapil Sharma
    ~~~~~~~~~~~~~
    Life is too short, Enjoy It.

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    • #3
      Re: Convert Enterprise Root CA to Standalone Root CA and create new Subordinate CAs

      Hi, yes that why i posted to ask if it possible to move my current enterprise root CA to a standalone root CA, aka offline root CA.

      Any ideas on this one guys?

      Many thanks,

      Chris

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