Internet Access has been knobbled

[Gary Taig]

Colin wrote:

As Liam points out it is not getting an ip address from the modem
(assuming that is a DHCP server). I would first try running a
different ethernet cable direct from the PC to the modem and see if it
works then. That will rule out the cables and the switch.



Colin.

There is an Ethernet switch beside the computer which I powered on when ever I needed Internet access. And, every time I start F/Fox or anything that involves the Internet the lights flashing across the switch would clearly identify packet activity.  THERE IS NONE.


I have checked (read REPLACED) the cable between the computer & switch.

If the problem was a cable between there and the router, the switch would still 'flash' with packet activity.

No go.


I think the problem lies with the Auto eth0 file that has been trashed.

GT



________________________________
From: ubuntu-users-bounces at lists.ubuntu.com <ubuntu-users-bounces at lists.ubuntu.com> on behalf of Colin Law <clanlaw at gmail.com>
Sent: Thursday, 23 March 2017 3:50 AM
To: Ubuntu user technical support, not for general discussions
Subject: Re: Internet Access has been knobbled

On 22 March 2017 at 13:53, Gary Taig <taig at melbpc.org.au> wrote:
> On an old machine (10.04), from which I wish to collect (forward) all my old
> email, I'm finding things have changed.  When I start the old Firestarter,
> it reports "ETH0 is not ready".
>
> There is an 8-port Ethernet Switch between the computer and the modem. To
> retain all other functionality but cut the Internet I used to simply cut
> power to the switch.
>
> Anyway, there is no packet activity whatsoever, through the switch or to the
> modem and the aspect that makes this highly suspicious is that after I've
> started FireFox and attempted to connect to a server, ANY SERVER, and it
> reports that it cannot connect and invites checking to ensure FF has
> permission to access the Internet etc. THEN...  I find FF has defaulted to
> working offline.  I fix it, close FF and restart, and without my
> intervention it has been again set back to "working offline"
>
> SOMETHING IS INTERFERING...SOMEWHERE
>
> ifconfig reports as follows:
>
> eth0      Link encap:Ethernet  HWaddr 00:25:11:1a:ed:ee
>           UP BROADCAST MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
>           Memory:feac0000-feae0000
>
> lo        Link encap:Local Loopback
>           inet addr:127.0.0.1  Mask:255.0.0.0
>           inet6 addr: ::1/128 Scope:Host
>           UP LOOPBACK RUNNING  MTU:16436  Metric:1
>           RX packets:658 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:658 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:53748 (53.7 KB)  TX bytes:53748 (53.7 KB)
>
> What settings can I check to identify/isolate the problem?

As Liam points out it is not getting an ip address from the modem
(assuming that is a DHCP server). I would first try running a
different ethernet cable direct from the PC to the modem and see if it
works then. That will rule out the cables and the switch.

Colin

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