On 11 Mar 2019, m.bushyager{at}gmail.com said the following...
 
 m.> Hi everyone!
 m.> 
 m.> My google-fu isn't what it should be apparently.
 m.> 
 m.> I'm trying to get Zork (I, II, III) running as doors in my Windows
 m.> Server 2008 32bit Mystic BBS build running.  I have LORD, Death, Wheel
 m.> of Fortune, TW2002, and Jedi nights running just fine, but I can't get
 m.> Zork working.  I understand that the games I 
 m.> have working already were designed as door games, and Zork isn't a "door
 m.> game" and requires DOS I/O redirection, but I haven't been able to
 m.> figure it out.

Here's a how-to I wrote on how to get it done back in 2014. I had it working
in Mystic first before I ported it over to Synchronet for DoorParty. It should
work on any BBS package. The setup is the same for any BBS.

http://throwbackbbs.com/dosbox_howto.html

Of course, you can always just sign up for DoorParty and connect to the DOS
adventure games I have setup already. Each user gets their own sandboxed save
game. ;)

--- Mystic BBS v1.12 A43 2019/02/23 (Raspberry Pi/32)