I guess DMZ could be achieved with physical interface.
That you got a m0n0wall box with LAN, WAN, DMZ. "xl0, rl0, fxp0"
There you should have real DMZ
Then there will be no interference with other PCs because they are not in
the same segment.
Hope it helps.
I would like to connect a playstation for online gaming to my mono wall.
So - there is for each game another port-range to play online - it is a
horror to configure all ports exactly.
My old router had an option "DMZ Host" - this host got all packets addressed
to my public ip, except the ports for which another nat rule was active.
Is there any option to get this type of NAT with mono-wall to work ? I have
already tried to redirect ports 1024-32767 to the playstation with resulted
into problems with getting online with my other PCs in the network