[Bug 1647031] Re: systemd-resolved’s 127.0.0.53 server does not follow CNAME records

[Fred]

Steve, I am using 232-18ubuntu1.

$ dpkg -l | grep systemd
ii  dbus-user-session                          1.10.10-1ubuntu2                            all          simple interprocess messaging system (systemd --user integration)
ii  libnss-resolve:amd64                       232-18ubuntu1                               amd64        nss module to resolve names via systemd-resolved
ii  libpam-systemd:amd64                       232-18ubuntu1                               amd64        system and service manager - PAM module
ii  libpam-systemd:i386                        232-18ubuntu1                               i386         system and service manager - PAM module
ii  libsystemd0:amd64                          232-18ubuntu1                               amd64        systemd utility library
ii  libsystemd0:i386                           232-18ubuntu1                               i386         systemd utility library
ii  python3-systemd                            233-1                                       amd64        Python 3 bindings for systemd
ii  systemd                                    232-18ubuntu1                               amd64        system and service manager
ii  systemd-sysv                               232-18ubuntu1                               amd64        system and service manager - SysV links

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Title:
  systemd-resolved’s 127.0.0.53 server does not follow CNAME records

Status in systemd:
  New
Status in network-manager package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released

Bug description:
  $ systemd-resolve www.freedesktop.org
  www.freedesktop.org: 131.252.210.176
                       2610:10:20:722:a800:ff:feda:470f
                       (annarchy.freedesktop.org)

  -- Information acquired via protocol DNS in 673.6ms.
  -- Data is authenticated: no
  $ ping www.freedesktop.org
  ping: www.freedesktop.org: Name or service not known
  $ cat /etc/resolv.conf
  # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
  #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
  # 127.0.0.53 is the systemd-resolved stub resolver.
  # run "systemd-resolve --status" to see details about the actual nameservers.

  nameserver 127.0.0.53
  $ dig +no{cmd,comments,stats} www.freedesktop.org @127.0.0.53
  ;www.freedesktop.org.		IN	A
  www.freedesktop.org.	7146	IN	CNAME	annarchy.freedesktop.org.
  $ dig +no{cmd,comments,stats} www.freedesktop.org @8.8.8.8
  ;www.freedesktop.org.		IN	A
  www.freedesktop.org.	14399	IN	CNAME	annarchy.freedesktop.org.
  annarchy.freedesktop.org. 14399	IN	A	131.252.210.176

  I trust it needn’t be explained why this makes the internet almost
  completely useless in zesty.

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