How to do cross firewall one way transitive trust with non existent domain

I've created two domains, which for the purposes of this question we'll call

1) company.com - an internal domain and
2) company.dmz - a dmz domain

Now, when I go to AD Domains and Trusts and try to create a new trust between the two domains it fails before the wizard even complete with the error

"The New Trust Wizard cannot continue because the specified domain cannot be contacted. Either the domain does not exist, or network or other problems are preventing connection."

Which of course seems reasonable given the DNS servers for company.com have absolutely no way of knowing about company.dmz.

So, how do companies NORMALLY approach making one domain aware of the other? I'm a little hesitant to just create stubs in company.com for company.dmz (and vice versa, since if I let company.dmz resolve publically it wont find our internal AD records), but maybe that's what one does. Especially since the number of servers is quite small and their addresses will not change after creation.

Can I get a confirmation? And maybe a pointer to the holes to poke in the firewall to allow for continued proper operation of the trust after its established?
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Eric_PriceAsked:
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Jeff GloverSr. Systems AdministratorCommented:
For DNS, I would do Split brain. For the DMZ it is a little more hassle because you need to keep it current but it would help the resolution.

For ports
https://technet.microsoft.com/en-us/library/dd772723(WS.10).aspx
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asavenerCommented:
On the domain.com DNS servers, set up a conditional forwarder for domain.dmz, and point it to the domain.dmz domain controllers.

This seems backwards to me, though.  You shouldn't trust the DMZ domain.  The DMZ domain should trust the internal domain.
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Windows Server 2012

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