[OpenAFS] Active Directory as KDC documentation
Jeffrey Altman
jaltman@columbia.edu
Tue, 08 Jun 2004 10:35:40 -0400
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Justice, William (WJJ.) wrote:
> Is there any documentation on using Active Directory as the KDC in an
> OpenAFS installation? Google gave some news group postings from a
> couple of years ago, figure there is some more up to date info?
>
>
>
> Thanks!
>
>
>
>-- Bill
>
Things really have not changed all that much.
The primary issue with using Windows 20003 Active Directory as the KDC
is that Windows 2003 will not issue tickets using the DES-CBC-CBC enctype.
It will issue tickets using the DES-CBC-MD5 enctype. This is fine if
your are
using a krb524 service to translate your Kerberos 5 tickets to Kerberos
4 tickets
(not supported by Active Directory but you can host the MIT Kerberos version
on the machine use keytabs); or if you are using gssklog (again you
would need
to add this but more importantly support for this is not integrated with
the
Windows AFS client.)
The long term direction is to internally support Kerberos 5 tickets as
AFS tokens
everywhere they are needed including the large tickets produced by
Active Directory.
This support is built into both the Windows versions and the Unix/Linux
version
as of 1.3.64. Athough the Windows version is the recommended product
to use
because it is the best we have; the Unix/Linux 1.3 branch is still
considered a development
branch and you would need to think long and hard before using it.
The way that I have setup my cells for use with Active Directory is that
I have an
MIT KDC which stores the service principal for the AFS cell. Then there
is a cross-realm
trust between Active Directory and the MIT realm. Therefore, I can
force the
service tickets to be DES-CBC-CRC and be of small enough size to be used
directly
with the 1.2.11 AFS servers while still using pure Kerberos 5.
Jeffrey Altman
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Justice, William (WJJ.) wrote:
<blockquote
cite="mid752E6D5014672D458A593B5E7A3CD5F508A8F4FA@na1fcm51.dearborn.ford.com"
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<div class="Section1">
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: Arial;">Is there any
documentation on using Active Directory as the
KDC in an OpenAFS installation? Google gave some news group postings
from
a couple of years ago, figure there is some more up to date info?</span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: Arial;"> </span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: Arial;">Thanks!</span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: Arial;"> </span></p>
<pre><span style="font-size: 10pt;">-- Bill
</span></pre>
</div>
</blockquote>
Things really have not changed all that much. <br>
The primary issue with using Windows 20003 Active Directory as the KDC<br>
is that Windows 2003 will not issue tickets using the DES-CBC-CBC
enctype.<br>
It will issue tickets using the DES-CBC-MD5 enctype. This is fine if
your are<br>
using a krb524 service to translate your Kerberos 5 tickets to Kerberos
4 tickets<br>
(not supported by Active Directory but you can host the MIT Kerberos
version<br>
on the machine use keytabs); or if you are using gssklog (again you
would need<br>
to add this but more importantly support for this is not integrated
with the <br>
Windows AFS client.)<br>
<br>
The long term direction is to internally support Kerberos 5 tickets as
AFS tokens<br>
everywhere they are needed including the large tickets produced by
Active Directory.<br>
This support is built into both the Windows versions and the Unix/Linux
version <br>
as of 1.3.64. Athough the Windows version is the recommended product
to use<br>
because it is the best we have; the Unix/Linux 1.3 branch is still
considered a development<br>
branch and you would need to think long and hard before using it.<br>
<br>
The way that I have setup my cells for use with Active Directory is
that I have an<br>
MIT KDC which stores the service principal for the AFS cell. Then
there is a cross-realm<br>
trust between Active Directory and the MIT realm. Therefore, I can
force the <br>
service tickets to be DES-CBC-CRC and be of small enough size to be
used directly<br>
with the 1.2.11 AFS servers while still using pure Kerberos 5.<br>
<br>
Jeffrey Altman<br>
<br>
<br>
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