here is a wiki article… https://en.wikipedia.org/wiki/DMZ_(computing)
Please, look at the images showing two different DMZ configurations, one with one single firewall and another with two firewalls.
I have two questions.
Is it correct that my Teltonika RUTXR1 is not only a router and a gateway but also a „Firewall“ in respect to the first DMZ image? Is it correct that I could build the DMZ from the first image simply using two interfaces, lets say LAN 192.1681.1/24 and DMZ 192.168.1.5/24?
Is it correct that if I have an OPNSense firewall and I connect it with my Teltonika interface LAN 192.1681.1/24 I would have the second image DMZ infrastructure?