ADSL wired connection does not work since upgrade

Can you ping 8.8.8.8 ?

Do you get any text if you hover your cursor over the question mark ?

What is the output of the commands

uname -a
lsb_release -crid
sudo lshw -C network

Do you get any text if you hover your cursor over the question mark ? - NO

ssrikumar@ssrikumar-OEM:~$ ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 192.168.1.1 icmp_seq=1 Destination Net Unreachable
From 192.168.1.1 icmp_seq=2 Destination Net Unreachable
From 192.168.1.1 icmp_seq=3 Destination Net Unreachable
From 192.168.1.1 icmp_seq=4 Destination Net Unreachable

...keeps repeating……………..

ssrikumar@ssrikumar-OEM:~$ uname -a
Linux ssrikumar-OEM 4.13.0-16-generic #19-Ubuntu SMP Wed Oct 11 18:35:14 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
ssrikumar@ssrikumar-OEM:~$ lsb_release -crid
Distributor ID: Ubuntu
Description: Ubuntu 17.10
Release: 17.10
Codename: artful
ssrikumar@ssrikumar-OEM:~$ sudo lshw -C network
[sudo] password for ssrikumar:
  *-network
       description: Ethernet interface
       product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 02
       serial: 90:fb:a6:8f:04:aa
       size: 100Mbit/s
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=192.168.1.100 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
       resources: irq:24 ioport:ee00(size=256) memory:fdbff000-fdbfffff memory:fdbe0000-fdbeffff memory:fdc00000-fdc1ffff
ssrikumar@ssrikumar-OEM:~$

Ok, what is the output of:

route

Thanks

Have you already tried restarting your router?

Have you already tried restarting your router? YES

ssrikumar@ssrikumar-OEM:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default gateway 0.0.0.0 UG 20100 0 0 eth0
link-local 0.0.0.0 255.255.0.0 U 1000 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
ssrikumar@ssrikumar-OEM:~$

any assistance on this please?

cannot get on without internet connectivity - no email, no web browsing, no upgrades

what is the output of

route -n

ssrikumar@ssrikumar-OEM:~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 20100 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
ssrikumar@ssrikumar-OEM:~$

What output do you receive for

ping -c 3 192.168.1.1
ifconfig -a

Thank you. The output is as follows:-

ssrikumar@ssrikumar-OEM:~$ ping -c 3 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.494 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.446 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.463 ms

--- 192.168.1.1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2027ms
rtt min/avg/max/mdev = 0.446/0.467/0.494/0.031 ms
ssrikumar@ssrikumar-OEM:~$ ifconfig -a
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
        inet 192.168.1.100 netmask 255.255.255.0 broadcast 192.168.1.255
        inet6 fe80::24f7:b22d:ca76:5feb prefixlen 64 scopeid 0x20<link>
        ether 90:fb:a6:8f:04:aa txqueuelen 1000 (Ethernet)
        RX packets 222 bytes 18395 (18.3 KB)
        RX errors 0 dropped 0 overruns 0 frame 0
        TX packets 135 bytes 14257 (14.2 KB)
        TX errors 4 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
        inet 127.0.0.1 netmask 255.0.0.0
        inet6 ::1 prefixlen 128 scopeid 0x10<host>
        loop txqueuelen 1000 (Local Loopback)
        RX packets 86 bytes 6630 (6.6 KB)
        RX errors 0 dropped 0 overruns 0 frame 0
        TX packets 86 bytes 6630 (6.6 KB)
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ssrikumar@ssrikumar-OEM:~$

I cannot see anything wrong.
Your last output shows that you can successfully communicate with the router.

This seems to me as if the router is not correctly forwarding the requests to the internet - for whatever reason.

I am using a Win XP / Ubuntu Dual Boot System.

The ADSL connection problem is only with Ubuntu

With Win XP, there is no problem and I can connect onto the internet, as I am doing right now.

Also tried with a Mobile Broadband Dongle connection - works with Win XP but not with Ubuntu.

Since the hardware is OK, is there some setting that needs to be changed in the Ubuntu ADSL connection settings.

I suggest that you compare the IP address settings between Ubuntu and Windows.
E.g.: Does the system get the same IP address when booted into Windows and when booted in Ubuntu?
(commands "ipconfig /all" in Windows and "ifconfig -a" in Ubuntu)

Is there anything shown in the Ubuntu system logs with respect to networking?
Boot Ubuntu without the network cable plugged in, wait a minute for the startup processes to finish, plug the network cable into the computer, wait another half minute and issue the command
dmesg | tail

The IP Addresses are the same. Please see the post below:-
Ubuntu 17.10
ssrikumar@ssrikumar-OEM:~$ ifconfig -a
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
        inet 192.168.1.100 netmask 255.255.255.0 broadcast 192.168.1.255
        inet6 fe80::24f7:b22d:ca76:5feb prefixlen 64 scopeid 0x20<link>
        ether 90:fb:a6:8f:04:aa txqueuelen 1000 (Ethernet)
        RX packets 390 bytes 28151 (28.1 KB)
        RX errors 0 dropped 0 overruns 0 frame 0
        TX packets 127 bytes 13501 (13.5 KB)
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
        inet 127.0.0.1 netmask 255.0.0.0
        inet6 ::1 prefixlen 128 scopeid 0x10<host>
        loop txqueuelen 1000 (Local Loopback)
        RX packets 102 bytes 8094 (8.0 KB)
        RX errors 0 dropped 0 overruns 0 frame 0
        TX packets 102 bytes 8094 (8.0 KB)
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ssrikumar@ssrikumar-OEM:~$

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\S.Srikumar>
C:\Documents and Settings\S.Srikumar>ipconfig

Windows IP Configuration

Ethernet adapter Local Area Connection 3:

        Connection-specific DNS Suffix . : Home
        IP Address. . . . . . . . . . . . : 192.168.1.100
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.1.1

C:\Documents and Settings\S.Srikumar>

ssrikumar@ssrikumar-OEM:~$ dmesg | tail
[ 19.124165] audit: type=1400 audit(1512424600.324:10): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/lightdm/lightdm-guest-session//chromium" pid=615 comm="apparmor_parser"
[ 19.205780] audit: type=1400 audit(1512424600.406:11): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/bin/mediascanner-service-2.0" pid=620 comm="apparmor_parser"
[ 30.653137] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 30.665140] r8169 0000:02:00.0 eth0: link down
[ 30.665257] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 63.969968] usbcore: registered new interface driver snd-usb-audio
[ 72.617296] rfkill: input handler disabled
[ 75.978161] FAT-fs (sdc1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 126.119154] r8169 0000:02:00.0 eth0: link up
[ 126.119170] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

Hope this helps. Thank you.

I do not see anything wrong on Ubuntu side.
Do you need IPv6? if not, you could try disabling it.

Got a new Computer and installed Ubuntu with all the upgrades. Now the ADSL line works and can connect to the internet and receive emails as usual.
This question may now be closed.
Thank youi.