frequent unabity to connect to websites, frequent connection problem.

[David]

 Cabled conection to ADSL. frequently unable to connect to websites, restarting network manager resolves problem temporarily. Seems to be no problem when connected to VPN. After diconecting VPN connection, not able to connect to internet. Restart connection or network manager needed.

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
CurrentDesktop: Unity:Unity7
Date: Sat May 6 16:53:50 2017
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2017-01-21 (105 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
IpRoute:
 default via 192.168.1.1 dev enp4s1 proto static metric 100
 169.254.0.0/16 dev enp4s1 scope link metric 1000
 192.168.1.0/24 dev enp4s1 proto kernel scope link src 192.168.1.3 metric 100
IwConfig:
 lo no wireless extensions.

 enp4s1 no wireless extensions.
NetworkManager.conf:
 [main]
 plugins=ifupdown,keyfile

 [ifupdown]
 managed=false
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
RfKill:

SourcePackage: network-manager
UpgradeStatus: Upgraded to zesty on 2017-04-15 (21 days ago)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH CONNECTION CON-UUID CON-PATH
 enp4s1 ethernet connected /org/freedesktop/NetworkManager/Devices/1 Connessione via cavo 1 e6fa8c59-3af2-3ef5-9425-38f3b0ed6c60 /org/freedesktop/NetworkManager/ActiveConnection/1
 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 enabled enabled enabled

[dino99 (9d9)]

That version is now dead
http://news.softpedia.com/news/ubuntu-17-04-zesty-zapus-has-reached-end-of-life-upgrade-to-ubuntu-17-10-now-519360.shtml