Problems with IPTables and DMZ port

["Klaus Leithner" <leithner () cortex at>]

Hello !

I have a very urgent problem with a linux box running RedHat 7.2 and IPTables v. 1.2.3.

We need to replace our normal Firewall (a Watchguard FireBox II) with the following configuration :

Public IP -  AdressRange : 211.18.46.192 with a NetMask 255.255.255.192 Private IP - AdressRange : 10.43.0.0 with a 
NetMask 255.255.0.0

We have a DMZ, wich uses the public IP - Adress Range.


Schemata : 
             (x)                        (Router : 211-18.46.193
                |       
                |
        -------------           (EXTERNAL INTERFACE : 211.18.46.194)
        |               |
        | Firewall      |---------      (DMZ Interface : 211.18.46.195  => All of our Server in the DMZ use IP-Adresses 
like 211.18.46.X, and a gateway of 211.18.4.193)
        |               |
        -------------           
                |                       (LAN INTERFACE : 10.43.0.1 => we use NAT)
                |                               
                |

We have a breakdown of our standard Firewall, and need to replace it as soon as possible with this linux - box. We have 
tried every trick, we know and about 24 hours of work => no chance !

Can anyone help us !!!

Thanks in advance
Klaus Leithner
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