AD in the DMZ . . . OK?

[karl <opium () runningriver co uk>]

Hello

One of the developers I work with has come up with a wild and crazy 
notion to write a .NET app that sits on a DMZ Web server but gets user 
information from the Active Directory on the other side of the firewall..

I'm inexperienced with this, so did some research and found that this 
kind of thing is possible (plenty of articles on putting Exchange 
servers in the DMZ), but found myself wondering if this ever happens, 
i.e. do people actually have their networks set up this way?  Do folk 
expose/replicate AD to the DMZ in practice?

It's all very well that this stuff is possible, but if it's perceived as 
insecure and not implementable in the real world . . . . . . .

Thanks for any advice . . . . .

Karl


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