FreeBSD gateway

[Socketd]

Hi

Just wanted to know how this is usually done.
I have:
	1. One router
	2. One gateway (FreeBSD 5.1)
	3. One LAN
	4. One DMZ

Now I was thinking:

Router (PPP setup and no IP)
  |
  |
Gateway	(Natd and firewalling)
  |\
  | \
  |  \
  |   \
Lan   DMZ

Now, should I nat the DMZ? 
If no, can the NIC to the DMZ and the NIC to the router be setup with no
IP's? So that they just forward all traffic?

br
socketd

ps: Please CC to me as I am not on the list.