Can't access websites on DSL (PPPoE) connection

[Ihor Romanyshyn]

I found strange problem with PPPoE connection on Ubuntu 17.04 (16.10 is affected too).
To reproduce this problem you need to connect to PPPoE ISP and try to open some sites in browser. It happens every time on my machine. However I still can resolve ip addreses with nslookup. And Google still working.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: network-manager 1.4.4-1ubuntu3
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
Date: Fri Apr 28 17:45:31 2017
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2017-04-25 (3 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
IpRoute:
 default via 192.168.1.1 dev enp0s25 proto static metric 100
 169.254.0.0/16 dev enp0s25 scope link metric 1000
 192.168.1.0/24 dev enp0s25 proto kernel scope link src 192.168.1.2 metric 100
NetworkManager.conf:
 [main]
 plugins=ifupdown,keyfile

 [ifupdown]
 managed=false
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=false
 WWANEnabled=true
ProcEnviron:
 LANGUAGE=uk
 TERM=xterm
 PATH=(custom, no user)
 LANG=uk_UA.UTF-8
 SHELL=/bin/bash
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: yes
  Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 enp0s25 ethernet connected /org/freedesktop/NetworkManager/Devices/1 З’єднання Ethernet 1 f021ebe1-6abd-4196-bc04-ec7b5a5fe598 /org/freedesktop/NetworkManager/ActiveConnection/30
 wlp6s0 wifi unavailable /org/freedesktop/NetworkManager/Devices/2 -- -- --
 lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 -- -- --
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.4.4 connected started full enabled enabled disabled enabled enabled

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.