Re: 2 NIC cards not talking

chuck gelm net
2004-01-21T21:44:33Z

Hello, Chadha:

You do not show how you attempt the 'ping',
nor the error message.

Please show exact ping command attempt.
Please show output of 'netstat -r -n'.

Both cards (should not, cannot) be on the same subnet
for the 'firewall/router' to function. The 'firewall/router'
should show a route to the local LAN (eth1) for all addresses as
192.168.x.y and a default route (0.0.0.0) to eth0.

An old 'netstat -n -r' of mine looked like:
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt
Iface
67.39.15.254 0.0.0.0 255.255.255.255 UH 0 0 0
ppp0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0
eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0
lo
0.0.0.0 67.39.15.254 0.0.0.0 UG 0 0 0
ppp0

In the above case, ppp0 was a ppp-over-ethernet association with eth1.
You should mask out your real IP address for security (if static).

HTH, Chuck
p.s. I have never understood the signature threat! ? ! ?
Perhaps a separate email identity for public messages?

"Chadha, Devesh" wrote:
>
> Hi,
>
> I have a linux box with 2 NIC cards, both are properly configured. Both are
> on the same subnet, but still don't ping to one another!!
>
> I need to setup the box as the firewall/router that has eth0 set as external
> and eth1 as internal serving as DHCP server to other computers on the
> network. Both have static IPs assigned to them.
>
> Regards,
> Devesh
> 6-6859
>
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