AS KOM said PRIQ is pretty easy to setup and understand. Seems like a good fit for what you want to do. The wizard is 1 size fits some, so be aware of that. It will get you a basic setup from which to start however.
My advice is to make aliases for the different server/service/ip's. That way if anything changes you don't have to muck with the fw rules, you only need to change the alias entries.