Bill,
Just to clarify, if your setup has a external router that comes between your server and the Internet, and you want to access the Simple CS from the outside via the Internet; you will likely need to have the router forward any incoming requests on TCP port 4093 to your servers port 4093 and then on your server open port 4093 for incoming requests.
Most routers have this functionality built in, usually called something like 'Virtual Server" or "Port Forwarding"