Ip masquerading help

["Guilherme Barile" <gui@prosoma.com.br>]

Hello debian users.
I am having the following ip masquerading issue:

1) I have four networks in my office

200.189.194.144 (netmask 255.255.255.248) - internet servers

10.0.0.x (netmask 255.255.255.0) - internal network

10.0.1.x (netmask 255.255.255.0) - other internal network

200.217.207.129 (netmask 255.255.255.255) - ADSL router

I want a linux server (2.2 kernel) to route the packets and let everybody
access the internet via the ADSL link.
That's how I imagine the thing built:

eth2) 10.0.1.x--------------------------------
                                                                     |
eth1) 200.189.194.144 ------------              |
                                                      |              |
eth0) 10.0.0.x--------------           |              |
eth0:0) 200.207.217.129---           |              |
                                          |           |              |
                      -------------------------------------------
                      |               NIC1    NIC2      NIC3           |
                      |
|
                      |                       linux router
|
                      -------------------------------------------

so eth2 is 10.0.1.1, eth1 is 200.189.194.150 and eth0 has 10.0.0.1 and
200.207.217.129 ips (thanks to ip alising), so after this setup i connect
the interfaces to the corresponding hubs (the network hubs are NOT
interconnected), configure everything on /etc/network/interfaces and start
ipmasquerading (debian ipmasq package)
200.207.217.129, the ADSL port, is the default gateway.
>From a computer in the 10.0.0.x network I can ping the internet (via ADSL)
and any computer on the 10.0.1.x network (vice versa for the computers on
the 10.0.1.x net) BUT, i cannot access the servers connected to NIC2 (eth1)
directly .... I need some special rule for that.

Can anyone shed a light ?

 Thank you very much in advance

  gui