I'm having trouble with the internet connection on a Lenny/Sid system.
It is a very simple connection to a cable modem via an ethernet
cable.

/etc/network/interfaces includes the lo interface and "iface eth0 inet dhcp".

"ifup eth0" seems to work: the dhcp server (cable modem) gives the
correct IP address.

For some reason, at this point, iptables (I don't use a firewall)
starts spitting out a bunch of junk... (if you want to see it say). I
run "iptables -F" to stop that (removes some "log" stuff), but it only
works until a reboot.

/etc/resolv.conf is correct.

"ping google.com" returns "unknown host".

It all works when I boot the GRML LiveCD.

Thanks for your .


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On 8/20/07, Owen Heisler <owenh000@gmail.com> wrote:
> I'm having trouble with the internet connection on a Lenny/Sid system.
> It is a very simple connection to a cable modem via an ethernet
> cable.

> "ping google.com" returns "unknown host".

Here's a bit more:
Pinging a nameserver returns "ping: sendmsg: Operation not permitted"
And the last line of output from "ifup eth0" is "send_packet:
Operation not permitted"


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On Mon, Aug 20, 2007 at 09:26:11AM -0500, Owen Heisler wrote:
> I'm having trouble with the internet connection on a Lenny/Sid system.
> It is a very simple connection to a cable modem via an ethernet
> cable.
>
> /etc/network/interfaces includes the lo interface and "iface eth0 inet dhcp".
>
> "ifup eth0" seems to work: the dhcp server (cable modem) gives the
> correct IP address.
>
> For some reason, at this point, iptables (I don't use a firewall)
> starts spitting out a bunch of junk... (if you want to see it say). I
> run "iptables -F" to stop that (removes some "log" stuff), but it only
> works until a reboot.

What does "iptables -L" give (*before* you do "iptables -F")?
Is there anything in /etc/init.d with a name like iptables or firewall, ...?
>
> /etc/resolv.conf is correct.
>
> "ping google.com" returns "unknown host".
>
> It all works when I boot the GRML LiveCD.
>
> Thanks for your .
>
>
> --
> To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org
> with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org

Regards
--
Joachim Fahnenmüller


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(Sorry about the delay!)

On Mon, 2007.08.20 21:37, Joachim Fahnenmüller wrote:
> On Mon, Aug 20, 2007 at 09:26:11AM -0500, Owen Heisler wrote:
> > I'm having trouble with the internet connection on a Lenny/Sid system.
> > It is a very simple connection to a cable modem via an ethernet
> > cable.
> >
> > /etc/network/interfaces includes the lo interface and "iface eth0 inet dhcp".
> >
> > "ifup eth0" seems to work: the dhcp server (cable modem) gives the
> > correct IP address.
> >
> > For some reason, at this point, iptables (I don't use a firewall)
> > starts spitting out a bunch of junk... (if you want to see it say). I
> > run "iptables -F" to stop that (removes some "log" stuff), but it only
> > works until a reboot.
>
> What does "iptables -L" give (*before* you do "iptables -F")?
> Is there anything in /etc/init.d with a name like iptables or firewall, ...?

Chain INPUT (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere
LOG all -- loopback/8 anywhere LOG level warning
DROP all -- loopback/8 anywhere
LOG all -- anywhere anywhere LOG level warning
DROP all -- anywhere anywhere

Chain FORWARD (policy DROP)
target prot opt source destination
LOG all -- anywhere anywhere LOG level warning
DROP all -- anywhere anywhere

Chain OUTPUT (policy DROP)
target prot opt source destination
ACCEPT all -- anywhere anywhere
LOG all -- anywhere anywhere LOG level warning
DROP all -- anywhere anywhere


I tried 'iptables -F' before bringing up the connection, without success
pinging.
After flushing all the chains, should they still say "policy DROP", although
with no rules?

> > /etc/resolv.conf is correct.
> >
> > "ping google.com" returns "unknown host".
> >
> > It all works when I boot the GRML LiveCD.

I have been setting up another system and used aptitude's package list on it,
and encountered the same problem, so it is a package (from Lenny probably),not
something I have done manually.

Thanks!