[Freeipa-users] Question on AD to freeipa sync

Dmitri Pal dpal at redhat.com
Wed Oct 5 13:31:48 UTC 2011


On 10/05/2011 04:02 AM, Ondrej Valousek wrote:
> Submitted RFEs #743503,#743505,#743505 and #743509 into RedHat
> bugzilla (I have no login to fedorahosted.org so I could not submit to
> upstream).
> Take them as a wish-list only and feel free to close them if they do
> not fit into the IPA roadmap.

Thank you for taking time and doing this!

>
> Thanks!
> Ondrej
>
> On 10/04/2011 04:47 PM, Stephen Gallagher wrote:
>> These are all great ideas, Ondrej. Would you mind opening RFE bugs for
>> them? You can file them upstream at https://fedorahosted.org/sssd or in
>> Red Hat Bugzilla https://bugzilla.redhat.com in the sssd component.
>>
>> On Tue, 2011-10-04 at 16:29 +0200, Ondrej Valousek wrote:
>>>> Can you provide more information here? We DO have support for automatic
>>>> detection based on DNS SRV records. Does a "DC locator" use some other
>>>> mechanism?
>>>>
>>> Example AD domain CONTOSO.COM used on 3 sites - Prague,Cork, Dublin.
>>> I have machine in Prague and I want it to join CONTOSO.COM. Now if I
>>> used:
>>>
>>> dns_discovery_domain = contoso.com
>>>
>>> sssd would try to connect to any DC in the domain - even the one in
>>> Dublin, completely ignoring sites.
>>> I have to use:
>>>
>>> dns_discovery_domain = Prague._sites.contoso.com
>>>
>>> To force it to use Prague DCs only.
>>> My understanding is, that the "DC locator" tries to communicate with
>>> DC's first to determine local site and remote DC's are only used if no
>>> valid/working DC can be found in the local site (Prague in this case).
>>>
>>>> I'm not sure what you mean by this? Do you mean you don't want to have
>>>> to specify ldap_schema = rfc2307bis and have it instead auto-detected?
>>>>
>>>> That's trickier than it sounds.
>>>>
>>> well this is a really small one. I would say it would be perfectly
>>> sufficient to introduce something like:
>>>
>>> ldap_schema=msrfc2307bis 
>>>
>>> which would be equivalent to:
>>>
>>> ldap_user_object_class = user
>>> ldap_group_object_class = group
>>> ldap_user_home_directory = unixHomeDirectory
>>> ldap_schema = rfc2307bis
>>>
>>> also, the ldap bind mechanism negotiation could be potentially
>>> improved, now I have to explicitly specify
>>>
>>> ldap_sasl_mech = GSSAPI
>>>
>>> otherwise sssd tries to use SASL/EXTERNAL which fails when
>>> communicating to AD controllers.
>>>
>>>> What features of the krb5 library do you mean? SSSD provides a locator
>>>> plugin that manages several features of the krb5 library, including
>>>> kinit and kpasswd.
>>>>
>>> The thing is that not all Linux apps are using sssd so we have to
>>> remember to configure /etc/krb5.conf. too.
>>> When using Centrify, all I need to do is:
>>>
>>> # adjoin contoso.com
>>>
>>> ..which takes care of everything - /etc/nsswitch.conf, krb5.conf, PAM
>>> modules, eeeverything. If I wanted to use sssd for the same job I have
>>> to:
>>>
>>> 1. configure (manually) /etc/samba/smb.conf
>>> 2. net ads join (- just to get machine creds)
>>> 3. configure (manually) sssd.conf
>>> 4. configure (manually) PAM modules
>>> 5. configure (manually) krb5.conf
>>>
>>> I understand that much of this is probably not sssd duty, but it would
>>> be helpful to have some script around which would do the same job.
>>>
>>>
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>>
>>
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-- 
Thank you,
Dmitri Pal

Sr. Engineering Manager IPA project,
Red Hat Inc.


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