L22Pv2.x

With the proper network appliances, it is possible to have a DMZ, as long as your NetMAX is not the router for your NAT'd network and the connection to the DMZ.

This limitation is caused by the inability to specify between which NICs to apply IP Masquerading (NAT) to.

L22Pv3.x

The current version of the NetMAX FireWall products allow you to enable IP Masquerading between specific NICs, which should allow you to use your NetMAX as the router for your NAT'd network and the connection to the DMZ.

To do this, create a custom firewall rule on the external NIC. The custom rule should have a Category of Forward, an Action of masquerade, and you'll want to specify your Internal NIC's IP address for the source address. Leave every other field at its default setting. This will create an IP NAT between the external NIC and internal NIC involved.
address-suppressed