firewall question

From: Thomas S. Greenwalt (tomg@trancer.com)
Date: 11/05/01 

From: "Thomas S. Greenwalt" <tomg@trancer.com>
To: freebsd-security@freebsd.org
Date: Sun, 4 Nov 2001 19:20:40 -0600

I've been playing with setting up a firewall. This is the setup:
The firewall PC is running FreeBSD 4.4 with the default 'simple' firewall
running. There are two ethernet cards in it, one at IP 206.147.211.9 talking
to the outside network. The other ethernet card is using IP 10.0.0.1 and is
talking to an internel network of two PCs.
One PC is running FreeBSD 4.4 and is at IP 10.0.0.2 and the other PC is
running Win98 and is at IP 10.0.0.3. Both are using 10.0.0.1 as the default
gateway.
If both machines are plugged into the network and running everything seems to
be working fine. However as soon as I shut down the Win98 box or unplug it
from the network, the FreeBSD machine can't communicate out of the firewall
anymore. Plug the Win98 box back in and it starts working again.
Any suggestions? TIA 

-- 
Tom Greenwalt (F.O.E.)  Trancer Software Inc.  tomg@trancer.com
9099 7th Street NE                                  http://www.trancer.com/
Minneapolis, MN 55434-1113                  http://www.trancer.com/~tomg
---- When I'm good I'm very good, when I'm bad I'm better, ----
---------- But when I'm evil you better run. -------------
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