IOGear GWA504 Manual - Manual (Page 66)

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.
Virtual Server enables WWW, FTP and other
services on your LAN to be accessible to Internet
users. Refer Internet Services for well known ports.
Example
Comment
The above example provides 4 type of services: FTP
Server (port 21), Web Server (port 80), PPTP VPN
Server (port 1723, PPTP) and a user defined server
(ports 2000-2999).
63
Virtual Server
Configuration Utility