[Bug 1671606] Re: DNS server from vpn connection is not being used after network-manager upgrade to 1.2.6-0ubuntu0.16.04.1

[Nicholas Stommel]

Oops, Goth Queen actually provided a solution earlier, it was just difficult for me to understand at the time. Enter whatever fixed DNS server you want and
set 'Automatic (DHCP) addresses only' under IPv4 Settings in network-manager for the default network connection. So just manually entering in your VPN's DNS server (for PIA it's 209.222.18.222) or installing dnscrypt-proxy and choosing 127.0.0.2 as the server both work. This seems an adequate workaround for now.

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Title:
  DNS server from vpn connection is not being used after network-manager
  upgrade to 1.2.6-0ubuntu0.16.04.1

Status in network-manager package in Ubuntu:
  Confirmed
Status in resolvconf package in Ubuntu:
  Invalid

Bug description:
  I use my company's cisco vpn via network-manager in Ubuntu 16.04.2
  LTS. After recent upgrade of network-manager:amd64 from version
  1.2.2-0ubuntu0.16.04.4 to version 1.2.6-0ubuntu0.16.04.1 DNS
  resolution of VPN's server hostnames does not work. Roll back to
  version 1.2.2-0ubuntu0.16.04.4 solves the problem.

  Steps for reproducing:
  1. upgrade network-manager:amd64 from version 1.2.2-0ubuntu0.16.04.4 to version 1.2.6-0ubuntu0.16.04.1
  2. connect to VPN via network-manager applet
  3. nslookop servername.internal --> ** server can't find servername.internal: NXDOMAIN
  4. disconnect from VPN via network-manager applet
  5. roll back network-manager via command: sudo apt-get install network-manager=1.2.2-0ubuntu0.16.04.4
  6. restart network-manager via sudo service network-manager restart
  7. connect to VPN via network-manager applet
  8. nslookop servername.internal --> the server is resolved correctly

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: network-manager 1.2.6-0ubuntu0.16.04.1
  ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44
  Uname: Linux 4.4.0-66-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Mar  9 19:49:55 2017
  InstallationDate: Installed on 2015-10-05 (520 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  nmcli-nm:
   RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  WIFI     WWAN-HW  WWAN
   running  1.2.6    connected  started  full          enabled     enabled  enabled  enabled  enabled

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