Setup help RED and GREEN on same subnet

[Guest]

[firewallhelp]

I searched the forum but have not found the best answer for my scenario.

Here it is, We have a dedicated internet connection which it hooked to a router ip a.a.a.1
I have Endian setup with 2 nics and a crossover cable running from the router to one of the nice and the other nic is connected to our network.
We have the entire class C and would like to be able to assign our individual computers ips like a.a.a.10, a.a.a.11, a.a.a.12 etc.
Problem is Endian does not allow the red and green zone to be in the same subnet, I set the green ip to a.a.a.3 and wanted to set the red ip to a.a.a.4

My question is what is the best way to configure Endian so that we can use our Class C and still have all the features on Endian - VPN, Firewall, etc.

Thanks

[David.Dejaeghere]

do you mean that your ip range is a public range? and you want devices on your lan network have an individual public ip adres from that range?

[firewallhelp]

Yes