Ping and LAN Problem

[Derek Broughton]

Marius Gedminas wrote:

> On Mon, Aug 13, 2007 at 08:59:42PM +0530, das ??? wrote:
>> I have two Ethernet cards, named by OS as eth0 and eth2. My DSL router
>> modem is connected on eth2. It is working fine (that is how I am sending
>> this mail :)). But, my laptop (on Ubuntu 7.04 too) connected to this
>> machine on eth0 of the desktop. The eth0 is fixed IP: 192.168.0.1 and
>> the laptop is 192.168.0.2. Earlier, I have always connected like this,
>> with ipmasq on in the Desktop. But, for quite some time, I did not use
>> the laptop. Now, when I am going to connect, the Desktop is giving a
>> queer message:
>> 
>> <<<
>> dd at mahammad:~$ ping 192.168.0.2
>> PING 192.168.0.2 (192.168.0.2) 56(84) bytes of data.
>> ping: sendmsg: Operation not permitted
>> ping: sendmsg: Operation not permitted
>> ping: sendmsg: Operation not permitted
>> ping: sendmsg: Operation not permitted
> 
> You get this message when your firewall blocks an outgoing packet.

I don't think so.  You get that message when there is no route to the
destination. I can't say for sure whether you'll get it when the firewall
blocks traffic, but I'm sure it doesn't _have_ to be the firewall.

Try:
# route

and see if your network is actually configured.
-- 
derek