IOGear GWA502 Manual - Manual (Page 61)

You can configure the Wireless-G Broadband Router
as a virtual server so that remote users can access
services such as Web or FTP at your local site via
public IP addresses.
For example: a FTP server (public port 21) will be
translated into a local site (private 192.168.1.25)
through private port 1502.
Special Applications such as Internet gaming, video
conferencing, and Internet telephony software usually
require multiple connections. The Special Applications
feature allows these applications to work properly.
58
Configuration Utility
Virtual Server Virtual Server