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IIS Dual Firewall Config

Posted on 2009-05-14
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Last Modified: 2012-05-07
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.
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Question by:timbrigham
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Raj-GT earned 500 total points
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I have personally deployed Cisco PIXs and ASA in front of ISA in many deployments and it is very workable. This is somewhat a standard configuration as such will be supported by both vendors. Having private IPs in the external interface of the ISA will not be a problem as long as it does not overlap with anything inside your LAN and/or LAT table.
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by:timbrigham
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Raj-GT:
Thanks. That's just the kind of verification I needed.
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