[OpenAFS] mutimaster AD model and cross-realm

[Jeffrey Altman]

This is a cryptographically signed message in MIME format.

--------------ms090302060407090804060400
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Dean Knape wrote:

> This was Re: [OpenAFS] new infrastructure-afs home and backup questions
> but so not to confuse that thread I'm starting anew.

By replying to the previous thread, you are still in the previous
thread.  Changing the name of the subject does not alter what message
thread you are in.

> We've successfully implemented a cross-realm trust between a Kerberos
> realm and single AD domain.  After principal mapping, users are able to
> login with their Kerberos principle at AD domain member workstations.
> 
> The next thing we need to test and get working is the integration of a
> Kerberos realm into a multimaster AD domain model.  Here's our current
> AD model:
> 
> enterprise AD domain .......  TOP
>                                |            \
>                                |             D
>                                |            /
>                                |--------
>                               / \      |
>                              /   \     |
>                             /     \    |
> user AD domains .........   A      B   |
>                                        |
>                                        |
>                                        |
> resource AD domain .................   C
> 
> 
> external Kerberos realm ( domain D floating up there )
> 
> 
> This gives us:
> 
> Active directory domains
> ------------------------
> TOP.njit.edu
> A.TOP.njit.edu
> B.TOP.njit.edu
> C.TOP.njit.edu
> 
> Kerberos realm
> --------------
> D.njit.edu
> 
> Our AFS cell
> ------------
> D.njit.edu
> 
> Our TOP domain contains no users (only domain admin & related). This is
> the root of our AD and provides DNS, etc. to subdomains.
> 
> Domain A & B contain user accounts and some workstation accounts.
> 
> Domain C is resource domain and primarily for lab computer accounts and
> servers providing services to both students and faculty.  There are no
> user accounts here either.  Users from domain A and B need to have their
> identities mapped in such a way so they can sit at lab workstation whos
> computer account is in domain C but their user account is in either
> domain A or domain B.  We're fortunate to have user uniques user
> accounts across user domains.

If you are going to be mapping Kerberos principals from D to accounts
in the forest, the user accounts should exist in TOP not A and not B.
You are centrally controlling the name space at D, therefore you should
not be giving the ability to create user accounts mapped to that name
space to individual departments via the use of sub-domains.

> Now for my question -
> 
> What trust relationships and user identity mappings are needed to have
> to have users from domains A & B login to workstations/servers with
> computer accounts in domain C using their Kerberos realm identity?
> 
> sweating ...

The sub-domains should have knowledge of the existence of realm D
but do not have to have trusts with it.   The trust relationship is
between D and TOP.

Note: By using a multi-domain forest you will be making it impossible
(due to a Microsoft bug) for you to provide roaming profiles mapped
to AFS.

Jeffrey Altman



--------------ms090302060407090804060400
Content-Type: application/x-pkcs7-signature; name="smime.p7s"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7s"
Content-Description: S/MIME Cryptographic Signature
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--------------ms090302060407090804060400--