[Bug 1658592] Re: systemd-resolved causing google.com not reachable

[Steve Langasek]

This is definitely not reproducible for me.  It may have been a
duplicate of bug #1647031, however google.com is currently not a CNAME,
it is an A record instead.

Is this problem still reproducible for you?  If so, with which version
of Ubuntu?  (You originally reported this with Ubuntu 17.04 before
release; 17.04 is now end of life).

If you can reproduce the problem, please show the output of 'dig
google.com'.

** Changed in: systemd (Ubuntu)
       Status: Confirmed => Incomplete

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Title:
  systemd-resolved causing google.com not reachable

Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  System info:
  lsb_release -rd: Description:	Ubuntu Zesty Zapus (development branch)
  Release:	17.04

  uname -a:
  Linux pc 4.9.0-12-generic #13-Ubuntu SMP Mon Jan 9 20:06:25 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

  systemd --version:
  systemd 232
  +PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN

  Static IP address(10.0.0.250/16), DNS(8.8.8.8) and routes(10.0.0.1)
  are set manually in network manager.

  Problem Description:

  1. google.com is not accessible from firefox or chromium, but
  google.co.uk, google.co.jp can be accessble. Firefox would redirect
  google.com to
  "https://www.google.com.sg/?gfe_rd=cr&ei=eaCFWLfUDIe1vASXoY7gBA"
  reports an error "Firefox can’t find the server at www.google.com.sg."
  Chromium redirect to google.com.sg too and reports a DNS error.

  2. ping and host google.com shows no errors and reports correct IP
  addresses.

  3. ping: google.com.sg: Name or service not known

  4. host google.com.sg: google.com.sg has address 74.125.130.94

  5. entering 74.125.130.94 directly in Firefox address bar redirect the
  webpage to
  "https://www.google.com.sg/?gfe_rd=cr&ei=paKFWO2sJ9LFuASvwq2ADA"

  6. other PC running fedora distro in the same lan can reach google.com
  with firefox or chromium.

  7. Looking at /etc/resolve.conf, nameserver is 127.0.0.53. It also
  suggests systemd-resolved.service is in charge of name resolution. If
  I stop this service and change nameserver in /etc/resolv.conf to
  8.8.8.8, `google.com` can be accessed from firefox.

  8. If changing nameserver back to 127.0.0.53 and start systemd-
  resolved.service, google.com is not accessible from browser anymore.

  The above step seems to suggest the problem is with systemd-
  resolved.service.

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