Convert Enterprise Root CA to Standalone Root CA and create new Subordinate CAs
- From: Chris Morley <morleyc@xxxxxxxxx>
- Date: Tue, 18 Mar 2008 22:45:03 -0700 (PDT)
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
.
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