[plug] Dumb question

[Matt Kemner]

On Mon, 30 Apr 2001, Brad Campbell wrote:

> Eth0 is 192.168.0.100 and Eth1 is 192.168.1.100
> I have a default route to eth0 and a standard route to eth1
> I have ip forwarding enabled.
> The only way I can ping anything on eth0 from anything on eth1 is
> to enable masq with an ipchains rule.
 
> From this box I can ping anything from anywhere. But from 192.168.1.2 I can't
> ping 192.168.0.1 unless I have the below masq rule in place..

Does 192.168.0.1 have a default route pointing back to 192.168.0.100?  (or
at least a route for the 192.168.1.0/24 network pointing back to ..0.100)

Can you run tcpdump on each interface and see if the pings are getting
through to the other interface OK and if the remote host is sending a
reply?

tcpdump -lfi eth0
tcpdump -lfi eth1

 - Matt