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Bug 1321928 - ntpd fails with link local IPv6 addresses.
Summary: ntpd fails with link local IPv6 addresses.
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: ntp
Version: 6.7
Hardware: x86_64
OS: Linux
medium
high
Target Milestone: rc
: ---
Assignee: Miroslav Lichvar
QA Contact: qe-baseos-daemons
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-03-29 11:52 UTC by Piyush
Modified: 2018-07-09 08:39 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-10-27 14:56:52 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
allow sources specified by IPv6 link-local address (1.77 KB, patch)
2016-04-06 12:50 UTC, Miroslav Lichvar 		no flags Details | Diff
View All

Description Piyush 2016-03-29 11:52:19 UTC 
Description of problem:
Following bug is fixed by ntp.org. on which build will get this fix. 
ntpd fails with link local IPv6 addresses.
http://bugs.ntp.org/show_bug.cgi?id=1186

Version-Release number of selected component (if applicable):
6.7

How reproducible:
ntpd fails with link local IPv6 addresses.

Steps to Reproduce:
1. Configure link local ipv6 ntp server details.
2. Check after some time whether system has synced with ntp server. 
3. 

Actual results:
ntpd fails to sync with ntp server 

Expected results:
ntpd should sync with ntp server 

Additional info:
Comment 2 Miroslav Lichvar 2016-04-04 13:41:51 UTC 
Upstream commit:

https://github.com/ntp-project/ntp/commit/4a385df4917a49efb37d89276b42a3d962f3302a
Comment 3 Piyush 2016-04-05 11:29:23 UTC 
we have mereged the above commit to ntp-4.2.6p5-5.el6.centos.2.src.rpm but still the fix is not working, do you feel that we have to patch certain other patches to make this fix work ?
Comment 4 Miroslav Lichvar 2016-04-05 15:13:31 UTC 
It looks like you will need also

https://github.com/ntp-project/ntp/commit/309590ffad7a5432b3e6301cfb99b66114e1b984

This is a more invasive change and backporting will probably be more risky.
Comment 5 Piyush 2016-04-06 02:02:55 UTC 
Is there any plan to back port http://bugs.ntp.org/show_bug.cgi?id=1186 to 4.2.6 version for redhat 6.7 ?
Comment 6 Miroslav Lichvar 2016-04-06 12:50:24 UTC 
Created attachment 1144221 [details]
allow sources specified by IPv6 link-local address

This is a backport taking just a small part of the later upstream commit.
Comment 7 Piyush 2016-04-15 09:31:16 UTC 
Thanks Miroslav , we are able to patch ntp-4.2.6p5-5 & LLIPV6 is working now.
Comment 8 Piyush 2016-11-24 11:14:17 UTC 
We are now upgrading to CentOS6.8 , with that newer version of ntp is release, I have patch the following commit with new version of rpm. After patch also ipv6 communication is not happening. 
Do we need to patch any other files to make it work. Please share the information. 

https://github.com/ntp-project/ntp/commit/309590ffad7a5432b3e6301cfb99b66114e1b984
Comment 9 Miroslav Lichvar 2016-11-24 11:24:41 UTC 
The patch from comment #6 should work also with the current ntp packages in RHEL6. The changes since ntp-4.2.6p5-5 were mostly security fixes.
Comment 10 Tomáš Hozza 2017-10-27 14:56:52 UTC 
Red Hat Enterprise Linux 6 transitioned to the Production 3 Phase on May 10, 2017.  During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available.

The official life cycle policy can be reviewed here:
http://redhat.com/rhel/lifecycle

This issue does not appear to meet the inclusion criteria for the Production Phase 3 and will be marked as CLOSED/WONTFIX. If this remains a critical requirement, please contact Red Hat Customer Support to request a re-evaluation of the issue, citing a clear business justification.  Red Hat Customer Support can be contacted via the Red Hat Customer Portal at the following URL:

https://access.redhat.com
Comment 11 Guru Maheswarareddy 2018-07-09 08:19:14 UTC 
Hi All,
We have moved to Centos 7.4. Just wanted to check if fix is available in following rpm. If not what are the plans to address this in RHEL 7?

ntp-4.2.6p5-25.el7.centos.2.x86_64
Comment 12 Miroslav Lichvar 2018-07-09 08:39:15 UTC 
The fix is not included in the RHEL 7.4 or 7.5 ntp package and it seems currently there is no plan to fix it. If you need it to be fixed in RHEL, please contact the Red Hat support.
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