Chapter 13. FileMaker Network Ports
About Network Ports
A network “port” may sound like a physical connection of some kind, like the USB ports on the back (or front or side) of your computer. In network terminology, though, a port is most often a logical or virtual concept, part of a network transport protocol (TCP/IP, for example, or UDP). In this sense, a port is a logical destination on a specific host that is identified with some particular service or listener. Port 21, for example, is often used for FTP servers.
Ports are most often significant to FileMaker administrators who administer or otherwise encounter firewalls. Many firewalls do port-based blocking or filtering of traffic. If traffic to or from a particular port is not permitted ...