We have a 3 mac ethernet network using a Dlink DI-604 (rev. 2.18) dsl/cable router with a cable modem connected. The network and cable internet access are working find. We are using a tcp/ip based server/client hair salon software package. One machine has the server and all machines have the client. I want to be able to remotely (from home, on the road, etc.) connect to the server via an iBook with the client installed. When I start the program on the iBook it asks for the IP address of the server. I input the ISP assigned IP address but get no response from the server. Do I need to setup a vpn so the iBook can get to the server? If so, how?