[Gllug] Hosed network

[James Courtier-Dutton]

On 27 November 2010 08:55, Sanatan Rai <sanatan at gmail.com> wrote:
> Hi all,
>    Yesterday I managed to hose networking on my machine.
> This resulted when I removed dhcdbd trying to follow the
> instructions to convert to dependency boot.
>
>    At this point I've managed to reinstall dhcdbd, dhcp-client
> from the Lenny install disc.
>
>    I have eth0 up:
>
> fractal:/home/sanat# ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:13:d3:ba:98:43
>          inet addr:192.168.2.3  Bcast:192.168.2.255  Mask:255.255.255.0
>          inet6 addr: fe80::213:d3ff:feba:9843/64 Scope:Link
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:4147937 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:3074512 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:1000
>          RX bytes:780041154 (743.9 MiB)  TX bytes:344276054 (328.3 MiB)
>          Interrupt:18 Base address:0xd300
>
> lo  <snipped>
>
> I can see all the machines on my home network, in fact the above dump
> was produced by SSH'ing into the machine.
>
> I can't see the outside world. So can't ping the outside world from
> this machine. The routes seem hosed:
>
> fractal:/home/sanat# netstat -nr
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
> 192.168.2.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
>
> fractal:/home/sanat# route
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 192.168.2.0     *               255.255.255.0   U     0      0        0 eth0
>
>
> What should I do to fix this?
>

You need an extra entry in your routing table.
So, if the IP address of you router attached to the internet is 192.168.2.1
use this line:
sudo ip route add default via 192.168.2.1

Your dhcp client should have added this for you, but at least this
manual line will get you going.
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