[Bug 1792118] [NEW] systemd-resolved periodically fails to resolve names from corporate network

[Sergey Naumov]

Public bug reported:

I never experienced problems with corporate servers on 14.04 and 16.04,
but with 18.04 I have to restart systemd-resolved a few times per day.

What I see: Internet addresses are resolved, but corporate ones aren't.
What I do to fix: sudo service systemd-resolved restart. After that corporate servers are resolved.

It looks like some issue with DNS cache.

$ lsb_release -rd
Description:    Ubuntu 18.04.1 LTS
Release:        18.04

$ apt-cache policy systemd
systemd:
  Installed: 237-3ubuntu10.3
  Candidate: 237-3ubuntu10.3
  Version table:
 *** 237-3ubuntu10.3 500
        500 http://ru.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     237-3ubuntu10 500
        500 http://ru.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

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

** Package changed: plymouth (Ubuntu) => systemd (Ubuntu)

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https://bugs.launchpad.net/bugs/1792118

Title:
  systemd-resolved periodically fails to resolve names from corporate
  network

Status in systemd package in Ubuntu:
  New

Bug description:
  I never experienced problems with corporate servers on 14.04 and
  16.04, but with 18.04 I have to restart systemd-resolved a few times
  per day.

  What I see: Internet addresses are resolved, but corporate ones aren't.
  What I do to fix: sudo service systemd-resolved restart. After that corporate servers are resolved.

  It looks like some issue with DNS cache.

  $ lsb_release -rd
  Description:    Ubuntu 18.04.1 LTS
  Release:        18.04

  $ apt-cache policy systemd
  systemd:
    Installed: 237-3ubuntu10.3
    Candidate: 237-3ubuntu10.3
    Version table:
   *** 237-3ubuntu10.3 500
          500 http://ru.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       237-3ubuntu10 500
          500 http://ru.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

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