i have tree nets wherefore I twice need NAT


local -----  DMZ --- wireless public network 
        |
        ---- (A)DSL

 
so i need nat between lan & dsl
and between lan & dmz
the public network has it own routing 
and will not know it way back to ipnumbers of my local_lan

in NAT -> Outbound ->

I tried two thing (both did not work)

1. disabled advanced outbound NAT 
a machine listing with tcpdump will see a ping from my local_lan_ip and
can not find it route back.

2. enabled advanced outbound NAT 
 with a NAT-config for my dmz and local_lan
agian the machine will see a ipnumber form the local lan.

Is there a way to solve this?

Marten