Public bug reported:
Since upgrade to 17.04/17.10 I cannot reach any server within my
university domain over LAN:
>From within the university network:
ping webmail.wur.nl
ping: webmail.wur.nl: Name or service not known
>From outside:
ping webmail.wur.nl
PING webmail.wur.nl (137.224.252.102) 56(84) bytes of data.
This is caused by the entry of the local host as nameserver in
resolf.conf as "nameserver 127.0.1.1".
When this line is manually removed the server is reached. However,
NetworkManager persistently restores the line to /etc/resolf.conf. This
can be avoided by stopping NetworkManager, adding dns=none to the [main]
section to /etc/NetworkManager/NetworkManager.conf and then restarting
NetworkManager.
NetworkManager should not add the line nameserver 127.0.1.1 to
resolv.conf on default, as this almost surely causes problems.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: network-manager 1.8.4-1ubuntu3.1
ProcVersionSignature: Ubuntu 4.13.0-29.32-generic 4.13.13
Uname: Linux 4.13.0-29-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: GNOME
Date: Tue Jan 30 15:18:38 2018
InstallationDate: Installed on 2015-11-05 (817 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
IpRoute:
default via 10.75.15.254 dev eth0 proto static metric 100
10.75.0.0/20 dev eth0 proto kernel scope link src 10.75.0.58 metric 100
169.254.0.0/16 dev eth0 scope link metric 1000
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=false
WWANEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to artful on 2018-01-16 (14 days ago)
mtime.conffile..etc.NetworkManager.NetworkManager.conf:
2018-01-30T15:14:52.823904
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
eth0 ethernet connected /org/freedesktop/NetworkManager/Devices/2
Wired connection 1 8bdd2177-0b8e-3365-82d1-1d5ea4cc3bc2
/org/freedesktop/NetworkManager/ActiveConnection/2
wlan0 wifi unavailable /org/freedesktop/NetworkManager/Devices/3 --
-- --
lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 --
-- --
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI
WWAN-HW WWAN
running 1.8.4 connected started full enabled enabled
disabled enabled enabled
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug artful package-from-proposed
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https://bugs.launchpad.net/bugs/1746258
Title:
Local servers not reachable as NetworkManager adds spurious nameserver
127.0.1.1 to resolv.conf
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