I think the encryption is incorrect. Should be:DES-CBC-CRC

tedc

On Mon, Jan 9, 2012 at 8:05 AM, Jeff White <[email protected]> wrote:

> Thanks for the reply.  I'm not sure what about short names would cause
> problems but I recall hearing about that with AD before so I'll assume it's
> just a weird thing/bug with Windows.  I originally created a logon name of
> 'afs' not 'afs/pitt.edu' so ktpass or something changed it.  I started
> over with an account named afs-pitt-edu-cell, exported the key, imported
> the key, and of course it still has the DES error as expected.  Do you
> think the KdcUseRequestedEtypesForTicket**s registry change which I can't
> implement without breaking everything as I mentioned before is why DES is
> failing?  I can see in gpresult that DES should be allowed  and the DES box
> is checked on the account so other than that or the attributes Douglas
> Engert mentioned I don't know what could be wrong and I'll have to admit
> defeat and give up.
>
> C:\Users\jaw171.AFSDC-DEV>**ktpass -princ afs/[email protected] -mapuser
> afs-pitt-
> edu-cell -pass * -crypto DES-CBC-MD5 +rndpass /mapop add +desonly /ptype
> KRB5_NT
> _PRINCIPAL +dumpsalt -out afs-pitt-edu-cell.keytab
> Targeting domain controller: AFSDC-DEV.pitt.edu
> Using legacy password setting method
> Successfully mapped afs/pitt.edu to afs-pitt-edu-cell.
> Building salt with principalname afs/pitt.edu and domain PITT.EDU(encryption 
> ty
> pe 3)...
> Hashing password with salt "PITT.EDUafspitt.edu".
> Key created.
> Output keytab to afs-pitt-edu-cell.keytab:
> Keytab version: 0x502
> keysize 48 afs/[email protected] ptype 1 (KRB5_NT_PRINCIPAL) vno 5 etype
> 0x3 (DE
> S-CBC-MD5) keylength 8 (0x57100bd91a01155d)
> Account afs-pitt-edu-cell has been set for DES-only encryption.
>
> Jeff White - Linux/Unix Systems Engineer
> University of Pittsburgh - CSSD
>
>
> On 01/08/2012 11:50 AM, Jeffrey Altman wrote:
>
>> Separate from your DES issues, there are two serious problems here.
>>
>> 1. You are creating an account with a logon name of "afs/pitt.edu"
>> instead of something like "afs-pitt-edu-cell" and then setting a Service
>> Principal Name of "afs/[email protected]" on that account.
>>
>> The slash in Kerberos is a name component separator.  When aklog
>> requests a ticket for "afs/[email protected]" it is asking the PITT.EDU
>> KDC for the principal
>>
>>   "afs" "pitt.edu"
>>
>> Not the principal
>>
>>   "afs/pitt.edu"
>>
>> 2. You cannot give the account the name "AFS" or have a short name of
>> "AFS".  Doing so will cause name resolution of "[email protected]" to succeed
>> which will in turn break all of your deployed Windows AFS clients.
>>
>>
>>
>>
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