JUst one NIC. How to configure the firewall

[Guest]

[iomega55]

I want to configure an endian in my network.

I have not red interface, only green, just one NIC. As you can see I'll be using the red as gateway.

In this kind of configuration, does the firewall work? I need to have the firewall functionality.

RED  11.1.11.1  (gateway)

GREEN  11.1.11.2

I can work with http proxy content filter,  but any change I make to firewall it is not applied.

I dont know if with only one network card Endian can work with firewall options. Or if I can simulate or fake a "red" interface using a second NIC but without any functionality, so all the traffic goes green but for the use of firewall the traffic goes to red.

Has anyone implemented this case?

Can you please share a sample?