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[Bug 1482887] Re: NetworkManager not setting given DNS in resolv.conf

 

** Information type changed from Public to Public Security

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https://bugs.launchpad.net/bugs/1482887

Title:
  NetworkManager not setting given DNS in resolv.conf

Status in network-manager package in Ubuntu:
  New

Bug description:
  -------------------- SYSTEM INFOS ----------------
  # lsb_release -rd
  Description:	Linux Mint 17 Qiana
  Release:	17

  # dpkg --list cinnamon resolvconf network-manager
  ii  cinnamon            2.2.16         amd64          Cinnamon desktop
  ii  network-manager     0.9.8.8-0ubunt amd64          network management framework (daemon and userspace tools)
  ii  resolvconf          1.69ubuntu1.1  all            name server information handler

  --------------------------------------------------

  So, it looks like a duplicate of
  https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/382161
  but this was on KDE in 2009 and I doubt it would have anything to do
  with it...

  Anyway, here is how to reproduce the problem:
  - Go to network-manager settings GUI (network indicator -> Network connections)
  - Edit current connection (wlan0 in my case)
  - Go to IPv4 settings
  - Select DHCP (addresses only)
  - Set a DNS server, say 37.59.72.228 (it's the first server from OpenNIC project)
  - Click save
  - Click disconnect
  - Click connect

  In the summary, you can see the DNS server you just typed. But if you
  # cat /etc/resolv.conf
  then you see the DNS server provided by your DHCP server (in my case 192.168.1.1)

  So the only way to bypass DHCP's DNS settings is to hard-code the DNS
  in /etc/resolvconf/resolv.conf.d/head

  Since this can lead users to believe that they are using their
  favorite DNS server while they get answers from their ISP/Hotspot DNS,
  I checked the 'Security' box.

  This could also be related to
  - https://bugs.launchpad.net/ubuntu/+source/network-manager-openvpn/+bug/1072899
  - https://bugs.launchpad.net/ubuntu/+source/network-manager-openvpn/+bug/1169437
  - https://bugs.launchpad.net/ubuntu/+source/network-manager-openvpn/+bug/254488
  - https://bugs.launchpad.net/ubuntu/+source/network-manager-openvpn/+bug/1304437

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