[Bug 1830531] [NEW] .local domain look ups do not trigger name publication

[Dan Kortschak]

Public bug reported:

On my local network I find that with 18.04 network name lookups using
.local domains no not work unless stimulated by a non-18.04 machine
first. This is observed for ssh, http, https and ping, but probably not
limited to those.

To demonstrate this here is a ping example.

~ $ ping pi.local
ping: pi.local: Name or service not known
~ $ ping pi.local
ping: pi.local: Name or service not known

# At this point head to another machine running 16.04.6 and execute ping pi.local.
# This is immediately successful. Then head back to the 18.04 machine.

~ $ ping pi.local
PING pi.local (192.168.108.28) 56(84) bytes of data.
64 bytes from pi.this.domain (192.168.108.28): icmp_seq=1 ttl=64 time=4.43 ms
64 bytes from pi.this.domain (192.168.108.28): icmp_seq=2 ttl=64 time=5.64 ms
64 bytes from pi.this.domain (192.168.108.28): icmp_seq=3 ttl=64 time=5.98 ms
64 bytes from pi.this.domain (192.168.108.28): icmp_seq=4 ttl=64 time=5.84 ms
^C
--- pi.local ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 7018ms
rtt min/avg/max/mdev = 4.435/5.476/5.986/0.613 ms

After a couple of minutes, the name resolution fails again, but can be
brought back again by following the procedure above.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: avahi-daemon 0.7-3.1ubuntu1.2
ProcVersionSignature: Ubuntu 4.18.0-20.21~18.04.1-generic 4.18.20
Uname: Linux 4.18.0-20-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun May 26 20:04:58 2019
InstallationDate: Installed on 2019-05-22 (4 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
SourcePackage: avahi
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: avahi (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1830531

Title:
  .local domain look ups do not trigger name publication

Status in avahi package in Ubuntu:
  New

Bug description:
  On my local network I find that with 18.04 network name lookups using
  .local domains no not work unless stimulated by a non-18.04 machine
  first. This is observed for ssh, http, https and ping, but probably
  not limited to those.

  To demonstrate this here is a ping example.

  ~ $ ping pi.local
  ping: pi.local: Name or service not known
  ~ $ ping pi.local
  ping: pi.local: Name or service not known

  # At this point head to another machine running 16.04.6 and execute ping pi.local.
  # This is immediately successful. Then head back to the 18.04 machine.

  ~ $ ping pi.local
  PING pi.local (192.168.108.28) 56(84) bytes of data.
  64 bytes from pi.this.domain (192.168.108.28): icmp_seq=1 ttl=64 time=4.43 ms
  64 bytes from pi.this.domain (192.168.108.28): icmp_seq=2 ttl=64 time=5.64 ms
  64 bytes from pi.this.domain (192.168.108.28): icmp_seq=3 ttl=64 time=5.98 ms
  64 bytes from pi.this.domain (192.168.108.28): icmp_seq=4 ttl=64 time=5.84 ms
  ^C
  --- pi.local ping statistics ---
  4 packets transmitted, 4 received, 0% packet loss, time 7018ms
  rtt min/avg/max/mdev = 4.435/5.476/5.986/0.613 ms

  After a couple of minutes, the name resolution fails again, but can be
  brought back again by following the procedure above.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: avahi-daemon 0.7-3.1ubuntu1.2
  ProcVersionSignature: Ubuntu 4.18.0-20.21~18.04.1-generic 4.18.20
  Uname: Linux 4.18.0-20-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sun May 26 20:04:58 2019
  InstallationDate: Installed on 2019-05-22 (4 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  SourcePackage: avahi
  UpgradeStatus: No upgrade log present (probably fresh install)

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