This bug was fixed in the package dnsmasq - 2.86-1.1ubuntu2
---------------
dnsmasq (2.86-1.1ubuntu2) kinetic; urgency=medium
* src/forward.c: Do not refuse retries from client DNS queries. Behaviour to
stop infinite loops when all servers return REFUSED was wrongly activated
on client retries, resulting in incorrect REFUSED replies to client
retries. The code added here is a cherry pick released in upstream version
2.87, originating at
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=2561f9fe0eb9c0be
(LP: #1981794)
-- Lena Voytek <lena.voy...@canonical.com> Fri, 30 Sep 2022 08:42:39
-0700
** Changed in: dnsmasq (Ubuntu Kinetic)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1981794
Title:
Duplicate/retried DNS queries fail with REFUSED (Fixed in upstream)
Status in dnsmasq package in Ubuntu:
Fix Released
Status in dnsmasq source package in Jammy:
Confirmed
Status in dnsmasq source package in Kinetic:
Fix Released
Bug description:
Duplicate or retried DNS queries will return REFUSED for one of the
queries causing intermittent failures in clients.
This probably breaks lots of things, but for me is causing 22.04's
internet connection sharing to be unstable. It's particularly bad for
my Xbox which seems to like sending duplicate queries.
Here's an example capture:
22:37:25.308212 IP 10.42.0.16.54248 > 10.42.0.1.53: 22442+ A?
title.auth.xboxlive.com. (41)
22:37:25.332711 IP 10.42.0.16.54248 > 10.42.0.1.53: 22442+ A?
title.auth.xboxlive.com. (41)
22:37:25.332740 IP 10.42.0.1.53 > 10.42.0.16.54248: 22442 Refused 0/0/0 (41)
22:37:25.353003 IP 10.42.0.1.53 > 10.42.0.16.54248: 22442 2/0/0 CNAME
title.auth.xboxlive.com.akadns.net., A 40.64.90.82 (105)
This has been fixed in upstream as of Sept 2021 in the unreleased 2.87
version. It's apparently a regression in version 2.86 (also released
in Sept 2021). Ubuntu 22.04 and later all use the broken 2.86 version.
Upstream fix:
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=2561f9fe0eb9c0be1df48da1e2bd3d3feaa138c2
Upstream bug thread:
https://www.mail-archive.com/search?l=dnsmasq-discuss%40lists.thekelleys.org.uk&q=subject:%22%5C%5BDnsmasq%5C-discuss%5C%5D+REFUSED+after+dropped+packets%22&o=oldest&f=1
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