Since upgrade to 12.04 I have encountered the same problem here with DNS
name resolution while connected to VPN. DNS name resolution worked fine
under prior Ubuntu version 11.10 but stopped after upgrade.
DNS servers and search domains are specified in VPN settings. Host
names on the VPN network do not resolve even when fully qualified. It's
necessary to use the IP addresses while connected to VPN to RDP into
machines. Running "host {machine name} {dns server}" from terminal
works to resolve names to IP's.
I have tried disabling dnsmasq in
/etc/NetworkManager/NetworkManager.conf and vice versus. These changes
do not seem to have any affect. Any workaround besides using IP
addresses?
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https://bugs.launchpad.net/bugs/994575
Title:
dnsmasq does not update nameserver info after network change
Status in “network-manager” package in Ubuntu:
Confirmed
Bug description:
I have a VPN set up in Network Manager, which worked well when my
system was running 11.10.
After upgrading to 12.04, I've noticed that DNS changes needed by the
VPN aren't happening. Hosts that only resolve within the VPN won't
resolve, and hosts that are supposed to resolve with different IP
addresses inside the VPN don't.
I can see the new, proper nameserver configuration in /var/run/nm-dns-
dnsmasq.conf. I can resolve properly if I query the name server
directly, i.e. "host <name-to-resolve> <vpn-dns-server-ip>". And, if
I use that IP address instead of the name, I can successfully do
things like ssh. But simple resolution appears to still be using the
old name server.
At one point, I killed off dnsmasq and wrote a new /etc/resolv.conf
with the VPN name servers. That worked, but caused all manner of
problems later.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Fri May 4 09:04:23 2012
EcryptfsInUse: Yes
IfupdownConfig:
auto lo
iface lo inet loopback
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
IpRoute:
default via 192.168.50.2 dev eth0 proto static
169.254.0.0/16 dev eth0 scope link metric 1000
192.168.50.0/24 dev eth0 proto kernel scope link src 192.168.50.222
metric 1
192.168.50.0/24 dev wlan0 proto kernel scope link src 192.168.50.106
metric 2
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: Upgraded to precise on 2012-05-02 (1 days ago)
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
eth0 802-3-ethernet connected
/org/freedesktop/NetworkManager/Devices/1
wlan0 802-11-wireless connected
/org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE
WIFI WWAN-HARDWARE WWAN
running 0.9.4.0 connected enabled enabled
enabled enabled disabled
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