** Also affects: resolvconf (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1713457
Title:
DNS search domain not removed from resolv.conf on disconnect
Status in network-manager package in Ubuntu:
Confirmed
Status in resolvconf package in Ubuntu:
New
Bug description:
When I connect to a wireless network that sets a DNS search domain
name via DHCP, the line 'search <domain>' is added to /etc/resolv.conf
as expected. But if I then disconnect and connect to a different
network, it is not removed from resolv.conf. If the second network
also sets a search domain name, that one gets appended to resolv.conf
along with the first one, and so on. Depending on the network, this
can cause DNS leaks, name resolution failures, or other misbehavior.
To be sure this wasn't some kind of user configuration issue, I
reproduced this on the artful daily live image (artful-desktop-
amd64.iso, 2017-08-27), from which I'm writing this report.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: network-manager 1.8.2-1ubuntu3
ProcVersionSignature: Ubuntu 4.12.0-11.12-generic 4.12.5
Uname: Linux 4.12.0-11-generic x86_64
ApportVersion: 2.20.6-0ubuntu7
Architecture: amd64
CasperVersion: 1.384
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 28 10:34:22 2017
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
IpRoute:
default via 172.20.20.1 dev wlp3s0 proto static metric 600
169.254.0.0/16 dev wlp3s0 scope link metric 1000
172.20.20.0/24 dev wlp3s0 proto kernel scope link src 172.20.20.20 metric 600
LiveMediaBuild: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170827)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
wlp3s0 wifi connected /org/freedesktop/NetworkManager/Devices/3
xfinitywifi 39ffbbfc-1c1e-41c9-b3eb-c513065c3ea6
/org/freedesktop/NetworkManager/ActiveConnection/2
enp0s31f6 ethernet unavailable /org/freedesktop/NetworkManager/Devices/2
-- -- --
lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1
-- -- --
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW
WIFI WWAN-HW WWAN
running 1.8.2 connected started full enabled enabled
enabled enabled enabled
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