Fedora Users — Firewall & Routing

With the help of many on the previous thread (Firewall - Very limited Access - suggestions), I've built my firewall using fwbuilder & FC1. At present I've got it set up in a test environment. The firewall seems to be operating correctly with one exception, but my real problem is with my routing. I've always been terrible with routing.... At present, I can't traverse from a workstation on the "internal" subnet to host on "external" subnet, or internet.

I am not using NAT on this firewall, it just bridges two subnets - allowing very specific traffic through (antivirus/windows-sus, remote desktop). I need to get the routing between subnets working through the firewall.

"external subnet" - eth0 - 192.168.50.0
gatway to internet - 192.168.50.1
eth0 ip 192.168.50.48/255.255.255.0 gw = 192.168.50.1

"internal subnet" - eth1 - 192.168.5.0
eth1 ip 192.168.5.200/255.255.255.0 gw = 192.168.50.1??

test host "internal"
ip 192.168.5.3/255.255.255.0 gw = 192.168.5.200??

Thanks!

Info from previous thread: >I'm intersted in building a choke firewall for the following sistuation. Have a closed network (police dept). There are no >crosses to the internet. However, we'd like VERY LIMITED access by the Windows DC server for the following: >Windows update (via SUS), Symantec AV updates, VNC/or remote desktop connection to 1 or 2 admin workstations on >our WAN.

Firewall & Routing - help!