3 outside networks

[Srinath Mantripragada <srinathm@terra.com.br>]

Hi,

I need some help with iptables and SNAT.


I have one inside net 172.16.0.0/24  and 3 outside nets  10.28.0.0/16 ,
   172.18.0.0/24 and Internet.
The 3 nets are routed by one router that i do not have control.

I have valid internet Addresses and i want to use NAT with one of them
but not for 10.28 and 172.18 networks.


i tried this:

iptables -t nat -I POSTROUTING -o eth1 -d ! 10.28.0.0/16 -j SNAT --to
MY.VALID.ADDR
iptables -t nat -I POSTROUTING -o eth1 -d ! 172.18.0.0/24 -j SNAT
--to MY.VALID.ADDR


I guess that i need something like :   "-d  ! 10.28.0.0/16  OR ! 
172.18.0.0./24"
but i dont  know how  to do that.


Can someone helpme ?


Thanks