[Samba] Fwd: Re: Samba4 and sssd, keytab file expires?
Peter Serbe
peter at serbe.ch
Thu Jan 15 03:48:32 MST 2015
Hi Rowland,
this posting ended a lot of grief I had with expired keytabs.
While this is presumably an issue of sssd, I have no chance to
attack the issue right at its root*). But rejoining the domain
with the lines
dedicated keytab file = /etc/krb5.memberserver.keytab
kerberos method = secrets and keytab
winbind refresh tickets = Yes
seems to fix it. Phew...
Maybe You or someone else could put this information in the
samba wiki. I posted my problem on the mailing list in mid
December, but didn't get a single response. But here is the
solution...
So: Thank You again!
Best regards
Peter
*) I am on Debian Jessie using Jessie's sssd 1.11.7-2.
This version of sssd is pretty old, but, well, this is
Debian. Compiling sssd on Debian is next to impossible.
At least for me: no luck.
Rowland Penny schrieb am 31.12.2014 18:24:
> On 31/12/14 15:48, Alessandro Briosi wrote:
>> Il 2014-12-31 16:29 Dr. Lars Hanke ha scritto:
>>>>> OK, you can get winbind to update your keytab, you need to alter your
>>>>> smb.conf slightly. You need to change 'kerberos method = secrets only'
>>>>> to either 'kerberos method = secrets and keytab' or 'kerberos method =
>>>>> system keytab' and add the line
>>>>>
>>>>> 'dedicated keytab file = /etc/krb5.keytab'.
>>>>
>>>> OOPS, I forgot a line, also add 'winbind refresh tickets = Yes' to
>>>> smb.conf
>>>
>>> Alessandro said to use sssd in the original post. Didn't use that so
>>> far, but I don't have any evidence that it would read winbind settings
>>> from smb.conf.
>>>
>>> Regards,
>>> - lars.
>>
>> Exactly, winbind is not used. It was used as a start, but would prefer
>> to use sssd.
>>
>> What I'm not sure is why the kerberos keytab file expires. This does
>> not happen on the DC, but only on this member server.
>>
>> I might schedule a script to update the keytab file, though I'm not
>> sure that's the expected behaviour.
>>
>> Ciao,
>> Alessandro
>
> It expires because it was not created on the member server, having said
> that, sssd should be able to update the keytab, I would suggest that
> sssd is not setup correctly and as such, I think that you need to take
> this problem to the sssd mailing list.
>
> If you decide to use winbind, which I can assure you will work, this can
> be set up to do what you need, see my previous posts
>
> Rowland
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