Bug 30115

Summary:	dns-<hostname> account should be created via UDM instead of locally in sam.ldb
Product:	UCS	Reporter:	Arvid Requate <requate>
Component:	Samba4	Assignee:	Samba maintainers <samba-maintainers>
Status:	RESOLVED DUPLICATE	QA Contact:
Severity:	enhancement
Priority:	P5	CC:	botner, gohmann, requate
Version:	UCS 4.2
Target Milestone:	---
Hardware:	Other
OS:	Linux
See Also:	https://forge.univention.org/bugzilla/show_bug.cgi?id=34669 https://forge.univention.org/bugzilla/show_bug.cgi?id=40419
What kind of report is it?:	Development Internal	What type of bug is this?:	---
Who will be affected by this bug?:	---	How will those affected feel about the bug?:	---
User Pain:		Enterprise Customer affected?:
School Customer affected?:		ISV affected?:
Waiting Support:		Flags outvoted (downgraded) after PO Review:
Ticket number:		Bug group (optional):
Max CVSS v3 score:
Bug Depends on:	34669
Bug Blocks:	31936

Description Arvid Requate

2013-01-22 19:51:57 CET

The workaround for Bug #30105 could be replaced by implementing the recommendation below. If this is bug actually gets fixed, another one should be filed against UCS@school to remove the workaround again.

+++ This bug was initially created as a clone of Bug #30105 +++

In UCS 3.0 the dns-<hostname> account was created in 96univention-samba4.inst
locally in the sam.ldb, before 97libunivention-ldb-modules.inst registered the
LDB module denying local user and group creation. In UCS 3.1 the creation of
the DNS service account was postponed to 98univention-samba4-dns.inst, so the
univention_samaccountname_ldap_check now denies local account creation.

Due to the workaround for Bug 26841 the DNS service account is explicitely
ignored by the S4 Connector (Bug 26861, the corresponding variable is set in
62ucs-school-slave.inst and 62ucs-school-master.inst), so the account only
exists locally in the sam.ldb of the corresponding Slave-PDC.

Note: Bug 26504 shifted the rIDAllocationPool a bit on the Slave-PDCs (to
2100), so there are no immediate collisions with a DC Master
(rIDAllocationPool: 1100-1599) and a DC Backup (rIDAllocationPool: 1600-2099)
in the school headquaters.

The joinscript univention-squid-kerberos/98univention-squid-samba4.inst gives
an example how these service accounts can be created via UDM, probably this
would be a good approach. This would require to take dns-<hostname> from the
connector/s4/mapping/user/ignorelist though.

Comment 1 Arvid Requate

2014-04-28 14:10:56 CEST

Currently we cannot set the servicePrincipalName (SPN) AD/Samba attribute via UDM, see Bug 34669. Maybe it's enough to write the SPN into the attribute userPrincipalName.

We should test if Windows-Clients and samba_dnsupdate and kinit -S "SPN>" would still work with this workaround. For other options see Bug 34669.

Comment 2 Felix Botner

2018-10-11 10:52:21 CEST


*** This bug has been marked as a duplicate of bug 47955 ***