More secure DMZ solution?

More secure DMZ solution?

Are there any plans to create a more secure DMZ solution?  Some other products offer a front-end DMZ portal site, and a back-end service that then connects to AD.  If I'm going to allow access for external users, I would prefer not to poke a hole in the firewall directly from the portal to AD.  Basically the back-end solution offers a middle-man approach.
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