Connecting remotely to my FM Server

[dannylan]

Hello! At the office my FM databases are hosted on an iMac running FM Server 5.5, I want to connect to them remotely. They have suggested that the best way to do it is to call my broadband provider and order a static public IP address that forwards to the private IP address on the iMac. Then, when I'm away, I can simply go to "Open Remote" on my FM and enter the public address. Under this scenario I have two questions:

1. They told me I have to configure port 5003... How and where do I do that?

2. Security: What steps do I need to take to prevent a "hacker" from finding the public IP address and getting in? I'm the only one that will know it and use it but I've heard that hackers use software which "detect" these kind of "open doors". I don't want to purchase anything expensive. Will the firewall on OS X do the job? The iMac currently has OS 9.2.2 but I would upgrade if that's the solution.

Thanks for all your assistance!