set up my DMZ

[<hamals@infinito.it>]

I've a DMZ with two server, I would like to acces them 
through my iptables firewall.

IP_serve1_DMZ =192.168.2.2
IP_serve2_DMZ =192.168.2.3

IP_server1_public = x.x.x.52
IP_server2_public = x.x.x.53 (x is for privacy..)


My firewall has

eth1 internet interface = x.x.x.50
eth0 dmz interface = 192.168.2.1

I need to have my server access with their pubbic IP, but 
I've only eth1 as inteface to internet.

I read that I can't use alias in iptables rules (like 
eth1:1 etc) , then what kind of rules have I to write to 
solve my problem?


I did this script but is it not working,
what do you think is wrong in it?



#!/bin/bash


iptables -F

iptables -t nat -F

iptables -t mangle -F

# filter table everythingd is ACCEPT  only to follow the 
easyest way#

iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT

## make DMZ -> internet ##

iptables -t nat -A POSTROUTING -s 192.168.2.1 -o eth1 -j 
SNAT --to-source 82.190.228.52


## make internet -> DMZ ##

iptables -t nat -A PREROUTING -i eth1 -d x.x.x.52 -j DNAT 
--to-destination 192.168.2.1


Thanks
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