IP address for a Palm to use JPilot?

Hi, JPilot users, I got surprised to find out that, in order to use JPilot, I need to setup PPP for serial in the kernel config, and then set up an IP address for the Palm. That is strange. Does it mean that the host Linux box become a router (gateway) and do I need to setup an internal network? Or do I have to go to the office of computer administrator of this building to obtain an authorized IP address to be assigned an extra permanent IP for my Palm Pilot? That is not clearly described in the web page of JPilot, and I hate such a document which misses such an obvious FAQ. Thanks. Regards, G. Hugh Song