Ping and LAN Problem

[sktsee]

On Mon, 2007-08-13 at 20:59 +0530, das দাশ wrote:
> Hello Friends:
> 
> 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
> 
> --- 192.168.0.2 ping statistics ---
> 4 packets transmitted, 0 received, 100% packet loss, time 2999ms
> >>>
> 
> >From the laptop too, the ping is not working. It is getting stuck
> without any output till I press 'Ctrl-c', though the self-ping with
> 'ping 192.168.0.2' from the laptop is working fine. 
> 
> Why this is happening? Earlier I have done all my works through this
> LAN. And I know so little of this networking things. 
> 
> I am quoting the output of the 'ifconfig -a' on the desktop:
> 
> <<<
> dd at mahammad:~$ ifconfig -a
> eth0      Link encap:Ethernet  HWaddr 00:A1:B0:09:0C:8F  
>           inet addr:192.168.0.1  Bcast:192.168.1.255  Mask:255.255.255.0
>           inet6 addr: fe80::2a1:b0ff:fe09:c8f/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:748 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:52 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:65766 (64.2 KiB)  TX bytes:3228 (3.1 KiB)
>           Interrupt:17 Base address:0x4e00 
> 
> eth2      Link encap:Ethernet  HWaddr 00:E0:7D:89:F6:2F  
>           inet addr:192.168.1.40  Bcast:192.168.1.255
> Mask:255.255.255.0
>           inet6 addr: fe80::2e0:7dff:fe89:f62f/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:16925 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:27249 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000 
>           RX bytes:3351843 (3.1 MiB)  TX bytes:21357939 (20.3 MiB)
>           Interrupt:16 Base address:0x2f00 
> 
> 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:24 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:24 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0 
>           RX bytes:1408 (1.3 KiB)  TX bytes:1408 (1.3 KiB)
> 
> >>>
> 
> Very Bewildered-ly
> das
> 
> 

Firewall?