Firewall Newbie Question

["Tom Gillon" <tom_gillon () hotmail com>]

I'm putting a Ukiah Netroad firewall into my network, and I'm having some 
problems getting traffic into and out of my network.  It seems to be a 
routing issue, and I was wondering if anyone had any ideas that would help 
me out.

Here's the situation:

Internet--Router A---Switch---Firewall---ATM Switch---Router B---Router C

The private network consists of 4 full Class C licenses and 1 Class C that 
is subnetted (/26).  Router C is an off-site facility that is directly 
connected into our network via a leased line.

When I set the firewall up, I gave the private NIC an IP address of one of 
the full Class C networks with no gateway address, per the setup 
instructions.  The problem I was having was that only computers on that 
Class C network could get Internet access.  The firewall did not know about 
the other Class C networks.  I had a static route on Router A to all of the 
Class C networks that pointed to the private NIC on the firewall, but 
computers on the other networks could not get access to the Internet.

So, my main question is how do I get the firewall to know about all of the 
separate internal networks.  Do I need a private NIC in the firewall for 
each network?

Thanks in advance,
Tom

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