On pe, 20 heinä 2018, Pierre Labanowski wrote:
Le 20/07/2018 à 12:30, Alexander Bokovoy a écrit :
On pe, 20 heinä 2018, Pierre Labanowski via FreeIPA-users wrote:
Hi, everybody,
I have a question about the best pratice use of freeipa with trust
AD and/or sync relationship from winsync users.
1/ trust
to set up an smb file sharing service via samba, would you advise
to integrate it in the IPA realm or in the AD domain?
Both are possible, but why one more than the other? in terms of
file access performance (metadata, acl ,etc....) managed via the
smb protocol isn't there a drawback related to samba in royaume
ipa to serve users who use a windows client?
Read notes on
https://www.freeipa.org/page/Howto/Integrating_a_Samba_File_Server_With_IPA
----
NOTE: Only Kerberos authentication will work when accessing Samba shares
using this method. This means that Windows clients not joined to Active
Directory forest trusted by IPA would not be able to access the shares.
This is related to SSSD not yet being able to handle NTLMSSP
authentication.
NOTE: When a Windows client accesses shares, Windows UI will need to be
able to resolve SIDs in access control lists. Inability to do so will
affect user experience and the way how applications are expected to work
with the share. A set of experiments in 2017 have demonstrated that
Microsoft does not test various fall backs around this behavior and only
consider the path used by Windows UI to communicate with a Global
Catalog service. It is also a 'client-specific' behavior and thus is not
subject of a protocol interoperability or being documented anywhere.
While for some applications/use cases it may work, it will not work for
many others, thus we cannot really qualify it as a supported solution
from FreeIPA side. ----
2/ winsync
do you have the same response arguments in the case of a sync
between AD and IPA?
winsync does not affect your ability to operate a file server for
Windows clients because it doesn't help you here at all. It is
irrelevant, in other words, to the task.
Sorry,I did not speak well, my questions are mainly about performance,
for example during a transfer of many small files. Does SID resolution
in ACLs impact performance through IPA integration? The second
questions on winsync had the same purpose of knowing if the user is on
IPA or in trust, have an affects performance.
There is no resolution of SIDs in ACLs because when you authenticate, a
system token is created by the server, associated with the user
connecting and it contains all SIDs this user is a member of or
represents, thus ACL checks are done directly using SIDs.
--
/ Alexander Bokovoy
Sr. Principal Software Engineer
Security / Identity Management Engineering
Red Hat Limited, Finland
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