[Samba] Right way to restore deleted objects (in samba 4.1 or newer with or without "ad recycle bin")
combr at samges.ru
Tue Nov 1 16:07:28 UTC 2016
I operate two-dc domain, based on samba 2:4.1.9+dfsg-1~bpo70+1
Forest function level: (Windows) 2003
Domain function level: (Windows) 2003
Lowest function level of a DC: (Windows) 2008 R2
AD Recycle bin not enabled (it can be enabled only on Dom.Level 2008R2)
Previous week one of our administrators delete computer accounts from AD
by accident, and we are not able to restore it.
I try to restore it as shown here:
because recipe from wiki are only for active "AD recycle bin"
method from bug (without recycle bin) - rename object from "Deleted
objects" to lastknown place by ldbrename, and then delete IsDeleted
attribute + add objectcategory attribute with ldbedit
after that object can be viewed in ADUC again
What about attributes as "lastKnownParent", "isRecycled" when restore
objects, must i delete it also (I deleted it)?
Why attribute "isRecycled" set, on wiki it present only if recycle bin
enabled? Is it because replication to second DC are done and "Multi-DC
Environment: Deleted Objects are Recycled Too Fast" (from wiki)?
I restore objects with attribute "isRecycled" set and clear it, but now
samba-tool dbcheck show me errors like
"Not moving object
Objects,DC=DomainDnsZones,DC=dc,DC=mydom,DC=ru into LostAndFound
ERROR: parent object not found for
If i run samba-tool dbcheck --fix, is it safe to fix it?
Second question is about lost attributes after restore by this methods.
Many attributes are lost, and after restore deleted machine account that
computer cannot login to domain, saying "there are no trust with that
domain" (from my memory).
In samba log, for example, I see errors like
"auth_check_password_recv: sam_ignoredomain authentication for user
[MYDOMAIN\MYWS194$] FAILED with error NT_STATUS_WRONG_PASSWORD"
I googling and find that deleting attributes when move it to "deleted
objects" are controlled by "searchflags" attribute, as listed here:
If I set for some attribute in schema an "8 (0x00000008)" value (in sum
with other) that attribute must saved. But for edit the schema i must
set special permissions,
are worth it?
Or I need to enable recycle bin and not to mess with schema editing and
searchflags (additionaly I don't know which attributes I need to preserve)?
What are right sequence for raise functional level for domain with
samba-tool domain level raise --domain-level=2008_R2 ?
Run it on DC with no FSMO roles and then on DC with it, and that's done?
How to see that it successful other than "domain level show", is it
After raise level and run (found in sources) enablerecyclebin script -
how I can restore objects, with ldbmodify as it shown on wiki, and all
(for communicate with computer account, for example) attribites are
A. Bartlett wrote in
https://bugzilla.samba.org/show_bug.cgi?id=10371#c27 about "Recycle bin
not tested and therefore unsupported".
Are there a version there it is working, is it working in samba 4.1, 4.2
or 4.4 (debian stable or testing)?
What about a changelog for samba 4.5: "Samba now supports tombstone
reanimation, a feature in the AD DC allowing tombstones, that is objects
which have been deleted, to be restored with the original SID and GUID
still in place."
But are this "tombstone reanimation" conflicts with enabled "recycle
bin" ? (#10371 comment 25)
wiki stated that "Windows Tools for Restoring Deleted Objects Does Not
Work", but #1071 comment says about working "adrestore -r" ?
I find an Marc Muehlfeld's letter about similar themes :)
Mike Lykov, system administrator, Russia
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