Home page logo

basics logo Security Basics mailing list archives

DMZ - Question
From: hol64 () hotmail com
Date: 26 Oct 2007 15:41:02 -0000

I have to setup a DMZ on our network. Our current layout is Internet Router <--> Firewall <--> WAN/LAN Router <--> 

The idea is to setup a back-to-back DMZ or Dual Firewall DMZ. So the topology would be like this..
Internet Router --> FW-1 <--> DMZ <--> FW-2 <--> WAN/LAN router. 

On the DMZ we will have a Web Server that needs access back to the Mainframe on the LAN, and a Mail server that need 
access to another mail server on the LAN.

One of my questions is the DMZ is in a /24 subnet and the LAN is on a /16 subnet. Is the only way for the web server in 
the DMZ to communicate with the inside LAN by NATting in the FW-2. Isn't this creating a double subnet from the 

I am working with 2 pix firewalls, and I am hoping to change FW-2 to a different brand that has stateful inspection.

Please Advice,



  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]