Don't understand how Forwarding woorks

[Vendramin Fabio <fvendram@dsi.unive.it>]

Hi to all!

I have this network config:


|router|----|switch/router|----|     firewall   |--------|subnet x.x.1.0|
x.x.1.2	     x.x.1.1	|      x.x.x.200  x.x.x.3
                        |
                        |
                    |subnet x.x.2.0|


My problem is that i have to forward all the pck from subnet x.x.1.0 to
the switch/router x.x.1.1

All the machines in the subnet x.x.1.0 have default gateway set up to
x.x.1.1.

Now, i have configured the firewall with packet forwarding and proxy arp
active, but seems that the subnet x.x.1.0 can't reach x.x.1.1 and x.x.2.0
and the rest.

The config of my 2 nework interfaces is:

LOCAL ETH
eth0	x.x.1.3
netmask 255.255.255.0

REMOTE ETH
eth1	x.x.1.200
netmask 255.255.255.0
gateway x.x.1.1

What is my fault ?
Please help me!!!

Thanks very very very much!