[FW1] Routing before FW-1 Installation

[Flavio Muscetra]

I have a NT box with FW-1 installed.   Actually i have 3 ethernet adapters, but it seems to exist some problems. The third ethernet card was added after the FW-1 installation.   The actual FW-1 configuration allows PCs behind the FW on the the net 10.10.10.x to connect to the Internet without restrictions. When i tried to allow HTTP connections from Internet to one PC on the 10.10.10.x net it doesn't work. I used as public IP the ethernet public adapter IP. I think the problem is in the NT routing configuration and not in FW-1 configuration.   I try to describe the system:   ethernet1 (public interface 199.199.199.111) net 199.199.199.x (C-class) ethernet2 (private interface 10.10.10.1)  net 10.10.10.x (C-class) ethernet3 (private interface with the same ip of the public net) net 199.199.199.x (C-class)   Which is the correct NT-routing table between these ethernet adapters? Is it possible to use the same C-Class for the Internet and the third private ethernet adapter (not using the same IPs)?   Any help is welcome!