Bug 49120 – Use of '.local' may cause issues with Mac, Linux and Android clients

Bug 49120 - Use of '.local' may cause issues with Mac, Linux and Android clients


Summary:	Use of '.local' may cause issues with Mac, Linux and Android clients

Status:	REOPENED

Product:	UCS
Classification:	Unclassified
Component:	System setup
Version:	UCS 4.4
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	UCS maintainers
QA Contact:	UCS maintainers

URL:	https://hutten.knut.univention.de/med...
Keywords:

Duplicates:	52172 (view as bug list)
Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2019-03-27 13:34 CET by Nico Stöckigt
Modified:	2022-11-09 18:12 CET (History)
CC List:	5 users (show)

See Also:	52172
What kind of report is it?:	Bug Report
What type of bug is this?:	2: Improvement: Would be a product improvement
Who will be affected by this bug?:	2: Will only affect a few installed domains
How will those affected feel about the bug?:	2: A Pain – users won’t like this once they notice it
User Pain:	0.046
Enterprise Customer affected?:	Yes
School Customer affected?:	Yes
ISV affected?:	Yes
Waiting Support:
Flags outvoted (downgraded) after PO Review:
Ticket number:	2019032721000281
Bug group (optional):
Max CVSS v3 score:

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Description Nico Stöckigt

2019-03-27 13:34:28 CET

Prevent the user from using the TLD '.local' in domain setup.

Comment 1 Arvid Requate

2019-03-27 16:43:08 CET

Can cause problems with multicast DNS (mDNS) https://tools.ietf.org/html/rfc6762 . See also https://en.wikipedia.org/wiki/.local : "The connection of Macintosh and Linux computers or zeroconf peripherals to Windows networks can be problematic if those networks include name servers that use .local as a search domain for internal devices."

In the Ubuntu Join Client we automatically adjust the resolv.conf to work around this.

Comment 2 Arvid Requate

2019-03-27 19:25:56 CET

univention-system-setup automatically suggests  ".intranet" by default since about 2014 (Bug 34484 Comment 106).

So if the customer wants to change change this, it's ok for me.

All we could improve here IMHO is to show a warning.

Comment 3 Florian Best

2020-10-01 12:14:28 CEST


*** This bug has been marked as a duplicate of bug 52172 ***

Comment 4 Philipp Hahn

2020-10-01 12:29:46 CEST

*** Bug 52172 has been marked as a duplicate of this bug. ***

Comment 5 Nico Gulden

2021-03-22 12:03:59 CET

The Nextcloud app blocks requests from `.local`. Together with an online office solution, documents refuse to save, for example. And the user does not get any visual feedback about it in the online office product.

I vote for at least showing a warning when defining the domain during system setup that `.local` may cause issues, e.g. with apps.

Comment 6 Philipp Hahn

2022-11-09 18:12:26 CET

Our internal `kvm_template: ucs-joined-master` from `kvm_operating_system: Others` is configured for `domainname=autotest.local`, which broke the Ubuntu Domain Join Assistent.