Bug 44130 – univention-dhcp XOR dhclient

Bug 44130 - univention-dhcp XOR dhclient


Summary:	univention-dhcp XOR dhclient

Status:	NEW

Product:	UCS
Classification:	Unclassified
Component:	DHCP
Version:	UCS 5.0
Hardware:	Other Linux

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

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Depends on:	27926
Blocks:
	Show dependency tree / graph

Reported:	2017-03-29 14:28 CEST by Philipp Hahn
Modified:	2021-04-27 11:16 CEST (History)
CC List:	0 users

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What kind of report is it?:	Bug Report
What type of bug is this?:	3: Simply Wrong: The implementation doesn't match the docu
Who will be affected by this bug?:	2: Will only affect a few installed domains
How will those affected feel about the bug?:	1: Nuisance – not a big deal but noticeable
User Pain:	0.034
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Description Philipp Hahn

2017-03-29 14:28:24 CEST

If the server uses DHCP itself to find its IP address, it MUST NOT be a dhcp server itself. We should warn when "univention-dhcp" is installed and if interfaces any interface is configured to use DHCP. We definitely should block running the join script then.

It might be okay to get one interface configured by DHCP and to serve DHCP on some other interface (docker, VMs), but that is probably unusual, so adding an option to "--do-it-as-I-know-what-I-am-doing' or UCRV might be an option.

The scenario from Bug #27926 with two DHCP servers providing the IP address for the other is invalid, as the DHCP server MUST know its own address beforehand: It fails horribly if you turn off both servers and then try to boot both in parallel (previous lease expired).

Comment 1 Philipp Hahn

2021-04-27 11:16:20 CEST

Still valid with UCS 5.0-0