Bug 44026 – IPv6 gateway "fe80::1" is not supported

Bug 44026 - IPv6 gateway "fe80::1" is not supported


Summary:	IPv6 gateway "fe80::1" is not supported

Status:	RESOLVED WONTFIX

Product:	UCS
Classification:	Unclassified
Component:	Network
Version:	UCS 4.1
Hardware:	Other Linux

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

URL:
Keywords:

Depends on:	35694
Blocks:
	Show dependency tree / graph

Reported:	2017-03-22 12:58 CET by Jens Thorp-Hansen
Modified:	2019-01-03 07:18 CET (History)
CC List:	5 users (show)

See Also:
What kind of report is it?:	Bug Report
What type of bug is this?:	4: Minor Usability: Impairs usability in secondary scenarios
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:	0.091
Enterprise Customer affected?:
School Customer affected?:
ISV affected?:
Waiting Support:
Flags outvoted (downgraded) after PO Review:
Ticket number:	2017032221000203
Bug group (optional):	IPv6
Max CVSS v3 score:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.

Description Jens Thorp-Hansen

2017-03-22 12:58:44 CET

UCS wants the gateway in the same subnet as the ip-adress. with ipv6 this may be not the case (you could reach the default gateway also via link-local (fe80:...)).

Currently the installer and UCS does not accept this - you need to install without workaround. Setting the Gateway afterwards via: ipv6/gateway does not work either. Currently, to set the gateway, you need to edit /etc/network/interfaces manually.


+++ This bug was initially created as a clone of Bug #35694 +++

A large hosting provider uses the address "fe80::1" as gateway. At least in 
UCS 3.2-3 errata3 it is not possible to set this gateway via UCR (ipv6/gateway="fe80::1"). The template for /etc/network/interfaces checks, if the address in in range of already defined/configured IPv6 subnets but the subnet fe80::/10 is not checked. Therefore the "gateway" entry is not written to the "interfaces" file.

Please note that link-local addresses from fe80::/10 are link specific and require an interface name to be unique.

Request:
It should be possible to define a gateway from fe80::/10 like this:
ucr set ipv6/gateway="fe80::/10%eth0"

Comment 1 Stefan Gohmann

2019-01-03 07:18:28 CET

This issue has been filled against UCS 4.1. The maintenance with bug and security fixes for UCS 4.1 has ended on 5st of April 2018.

Customers still on UCS 4.1 are encouraged to update to UCS 4.3. Please contact
your partner or Univention for any questions.

If this issue still occurs in newer UCS versions, please use "Clone this bug" or simply reopen the issue. In this case please provide detailed information on how this issue is affecting you.