[Bug 1732019] Re: systemd-resolved does not respect dynamic dns updates

[Steve Langasek]

Please show the output of systemd-resolve --status when this problem
occurs.

The list of DNS servers is not an ordered list.  If you need the VPN DNS
server to be used because it returns different records than the public
DNS, then you have a "split DNS" configuration; seeing this output will
help us diagnose whether this is configured correctly in systemd-
resolved.  It's possible that the NM strongswan plugin does not
correctly feed split DNS information to systemd-resolved.  (The network-
manager-openvpn plugin, for comparison, does.)

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

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Title:
  systemd-resolved does not respect dynamic dns updates

Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  I connect to a vpn using strongswan nm. When connected a new dns
  server is added to systemd-resloved and can be observed via systemd-
  resolved --status as beeing the first in the List. But this dns server
  is not beeing queried while resolving.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: systemd 234-2ubuntu12.1
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3.1
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Mon Nov 13 21:39:48 2017
  InstallationDate: Installed on 2017-11-06 (7 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  MachineType: Notebook P64_HJ,HK1
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic.efi.signed root=UUID=7e37331f-f91c-42cc-8264-25e3d4d6fba4 ro quiet splash acpi_osi=! "acpi_osi=Windows 2009" vt.handoff=7
  SourcePackage: systemd
  UpgradeStatus: Upgraded to artful on 2017-11-06 (7 days ago)
  dmi.bios.date: 02/06/2017
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.05.05
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: P64_HJ,HK1
  dmi.board.vendor: Notebook
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Notebook
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.05.05:bd02/06/2017:svnNotebook:pnP64_HJ,HK1:pvrNotApplicable:rvnNotebook:rnP64_HJ,HK1:rvrNotApplicable:cvnNotebook:ct10:cvrN/A:
  dmi.product.family: Not Applicable
  dmi.product.name: P64_HJ,HK1
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Notebook

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