How to use private IP on my DMZ network

Linux Advanced Routing and Traffic Control

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Hi everyone,
 
I have problems with my DMZ network. I'm using Linux with three interface (eth0, eth1,eth2). eth0 is connected to my dsl modem, eth1 is for my DMZ network where it contains all my websites, eth2 is my private network. I'm using iptables. Below is my diagram:
 
                                                          |-----------|      
      DSL (Internet) eth0 ------ |Firewall | -------  eth2 (Private Network)
                                                          |-----|-----|      
                                                                    |
                                                                    |
                                                                eth1 (DMZ network)
 
my current set-up:
 
eth0 :         203.164.168.30
            gw:  203.164.168.29
            mask: 255.255.255.252
 
eth1:           203.164.168.161 (also the gateway of the network)
            mask:255.255.255.248
website 1:  203.164.168.163
website 2: 203.164.168.164
website 3: 203.164.168.165             
            
I want to set-up my network like this:
 
eth0 : same IP
            same gateway
            same netmask
 
eth1 : 10.10.10.1
            gw: 10.10.10.1
website1: 10.10.10.5
website2:10.10.10.6
website3:10.10.10.7
website1 public address is 203.164.168.163
website2 public address is 203.164.168.164
website3 public address is 203.164.168.165
 
So my iptables looks like this:
 
iptables --table nat -A PREROUTING -p tcp -d 203.164.168.163 --dport 80 -j DNAT --to-destination 10.10.10.5
iptables --table nat -A PREROUTING -p tcp -d 203.164.168.164 --dport 80 -j DNAT --to-destination 10.10.10.6
iptables --table nat -A PREROUTING -p tcp -d 203.164.168.165 --dport 80 -j DNAT --to-destination 10.10.10.7
 
So what i mean is that any request for 203.164.168.163 to 165 would pass through my firewall then with my iptables set as such, it would be forwarded to my webserver.
 
Does anybody knows how to work this thing out? Is it possible? Please reply.
 
Thanks!
 
Rose
 
 
 

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