[TriLUG] Need IP tables help

[wayy2be]

I am having an issue with the following, I am a newbie to iptables. Here is what I am trying to do:  I have this linux box on the network, a window network, and it can access the internet fine with a browser. However an scripts or command line commands that access the internet are not working. We use a ISA server proxy for web access. What would be the easiest way to make this work? Any help would be great. Thanks. I am running Fedora Core 6