Public bug reported:
There is a local network, with two DNS servers, and a DHCP server. They
are both correctly configured and entirely functional, with correct
zoning (bind9) for split-horizon DNS. This has been a working
configuration for years. DHCP is configured so that clients use these
internal DNS servers.
There is no configuration in /etc/network/interfaces, so this is
entirely run by network-manager. When the wireless configuration comes
up, rather than pointing at the LAN dns servers, it points at 127.0.0.1.
I can identify no process providing the caching servics, ps -ax | grep
ns, name, bind, all come up empty. Whatever is doing name resolution,
it is not using the LAN's DNS servers, because none of the internal zone
entries are available. While public name resolution works, ssh to
other systems on the LAN fail because the internal zone host names are
never found.
If I manually place the local dns servers in /etc/resolv.conf,
everything works fine for a few minutes, when something overwrites it
back to 127.0.0.1
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.3.995+git201203152001.04b2a74-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.95-0ubuntu1
Architecture: amd64
Date: Sat Mar 24 09:55:26 2012
IfupdownConfig:
auto lo
iface lo inet loopback
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
ProcEnviron:
LANGUAGE=en_CA:en
TERM=xterm
PATH=(custom, user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise
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https://bugs.launchpad.net/bugs/963943
Title:
nm overrides LAN dns settings: host lookups on LAN fail.
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