Advanced > Applications - D-Link DI-604UP - Broadband Router Plus USB Print Server Product Manual

Example #2:
If you have an FTP server that you wanted Internet users to access by
WAN port 2100 and only during the weekends, you would need to enable
it as such. FTP server is on LAN computer 192.168.0.30. FTP uses port
21, TCP.
Name: FTP Server
Private IP: 192.168.0.30
Protocol Type: TCP
Private Port: 21
Public Port: 2100
Schedule: From: 01:00AM to 01:00AM, Sat to Sun
All Internet users who want to access this FTP Server must connect to it from port
2100. This is an example of port redirection and can be useful in cases where there
are many of the same servers on the LAN network.
ADVANCED > APPLICATIONS
Some applications require multiple connections, such as Internet gaming,
video conferencing, Internet telephony and others. These applications
have difficulties working through NAT (Network Address Translation).
Special Applications makes some of these applications work with the
DI-604UP. If you need to run applications that require multiple connections,
specify the port normally associated with an application in the "Trigger
23