<div>
Raj-GT:<br />
Thanks. That's just the kind of verification I needed.<br />

</div>


Raj-GT:
Thanks. That's just the kind of verification I needed.


<div>
<div class="content wysiwyg-content">
My company is considering implementing a dual firewall DMZ using a Cisco device on the front end and ISA on the back. I haven't found any documentation on this configuration. <br />
Is it workable, and is it a configuration I can get support for? <br />
My biggest concern is having private IP ranges on the &quot;public&quot; face of the ISA. 
</div>
</div>


My company is considering implementing a dual firewall DMZ using a Cisco device on the front end and ISA on the back. I haven't found any documentation on this configuration. 
Is it workable, and is it a configuration I can get support for? 
My biggest concern is having private IP ranges on the "public" face of the ISA. 

IIS Dual Firewall Config

Microsoft Forefront, formerly known as Internet Security and Acceleration Server (ISA Server), is a network router, firewall, antivirus program, VPN server and web cache that runs on Windows servers. It includes identity management and protection systems, and discontinued systems for threat management and network protection, along with protection for Sharepoint and Exchange. The scope of discussions includes forward and reverse proxy, application and service publishing, virtual private networks (VPNs), outbound access rules, SSL certificates and network routing within either a single node or an highly-available array pairing.

Microsoft Forefront ISA Server

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.