[OpenAFS] aklog: unknown RPC error (-1765328370) while getting AFS tickets

Jeffrey E Altman jaltman@auristor.com
Wed, 14 Sep 2022 14:49:57 -0400


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On 9/14/2022 2:17 PM, Jose M Calhariz (jose.calhariz@tecnico.ulisboa.pt) 
wrote:
> On Wed, Sep 14, 2022 at 02:00:02PM -0400, Jeffrey E Altman wrote:
>>
>> If your cell name is "your-cell-name.com" then these need to be
>>
>> addprinc -randkey -e aes256-cts-hmac-sha1-96 afs/your-cell-name.com
>> ktadd -k /root/rxkad.keytab afs/your-cell-name.com
>>
>> The use of "afs@REALM" is ambiguous in environment where there are multiple cells authenticated by a single REALM.
>>
> Good to know, in my case I am setting up new kerberos realm and new
> OpenAFS cells just for testing.  This ambiguos afs principal is good
> for me, but maybe not enough for other people.
When searching for a service principal, aklog will search for principals 
in this order

 1. afs/your-cell-name.com@   referral request sent to the client
    principal's REALM
 2. afs/your-cell-name.com@REALM
 3. afs@REALM

If afs/your-cell-name.com@REALM does not exist, there will be a negative 
lookup and the cost of the extra round trips.

"afs@REALM" should not be used for a new cell.  That name made sense 
when there was a one-to-one mapping between cell and realm due to the 
existence of "kaserver".

The preference for afs/your-cell-name.com@REALM over afs@REALM has been 
present in OpenAFS since the MIT AFS-Kerberos 5 Migration Kit was merged 
in November 2004.

OpenAFS 1.4.0 was the first release which integrated Kerberos v5 support.

Jeffrey Altman


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    <div class="moz-cite-prefix">On 9/14/2022 2:17 PM, Jose M Calhariz
      (<a class="moz-txt-link-abbreviated" href="mailto:jose.calhariz@tecnico.ulisboa.pt">jose.calhariz@tecnico.ulisboa.pt</a>) wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:20220914181743.GB20600@calhariz.com">
      <pre class="moz-quote-pre" wrap="">On Wed, Sep 14, 2022 at 02:00:02PM -0400, Jeffrey E Altman wrote:
</pre>
      <blockquote type="cite"><br>
        <pre class="moz-quote-pre" wrap="">If your cell name is "your-cell-name.com" then these need to be

addprinc -randkey -e aes256-cts-hmac-sha1-96 afs/your-cell-name.com
ktadd -k /root/rxkad.keytab afs/your-cell-name.com

The use of "afs@REALM" is ambiguous in environment where there are multiple cells authenticated by a single REALM.

</pre>
      </blockquote>
      <pre class="moz-quote-pre" wrap="">
Good to know, in my case I am setting up new kerberos realm and new
OpenAFS cells just for testing.  This ambiguos afs principal is good
for me, but maybe not enough for other people.
</pre>
    </blockquote>
    When searching for a service principal, aklog will search for
    principals in this order<br>
    <ol>
      <li>afs/your-cell-name.com@   referral request sent to the client
        principal's REALM<br>
      </li>
      <li>afs/your-cell-name.com@REALM</li>
      <li>afs@REALM</li>
    </ol>
    <p>If afs/your-cell-name.com@REALM does not exist, there will be a
      negative lookup and the cost of the extra round trips.  <br>
    </p>
    <p>"afs@REALM" should not be used for a new cell.  That name made
      sense when there was a one-to-one mapping between cell and realm
      due to the existence of "kaserver".  <br>
    </p>
    <p>The preference for afs/your-cell-name.com@REALM over afs@REALM
      has been present in OpenAFS since the MIT AFS-Kerberos 5 Migration
      Kit was merged in November 2004.</p>
    <p>OpenAFS 1.4.0 was the first release which integrated Kerberos v5
      support.</p>
    <p>Jeffrey Altman</p>
    <p><br>
    </p>
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