Configuration Guide

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2.9. NAT Menu
2.9.1. Port Forwarding
When NAT mode is enabled as the WAN interface type (section 3.5.2), you can redirect a communication
request from one address and port number combination to another. Only the IP address on the WAN side is
open to the Internet. If a computer on the LAN is enabled to provide services for the Internet (for example,
work as an FTP server), port forwarding is required so that all access requests to the external server port
from the Internet are redirected to the server on the LAN.
To add a port forwarding rule, select the Enable check box and click on ADD LIST (Figure 59). Enter the
parameters per the field descriptions in Table 4.
Figure 39: Port Forwarding settings
Table 4: Port Forwarding
Field Name
Description
WAN Port Range
Enter the port number range for the remote device in the format of 1000 to 1500
LAN IP Address
Enter the local host IP address. The address must be different from the IP address that is set
for the LAN Host Settings parameter, but they must be on the same network segment.
LAN Port
Enter the local port number. Range is 1 to 65,535.
Protocol
Select the type of data protocol, either TCP, UDP, or TCP&UDP
Remarks
2.9.2. Port Triggering
Port Triggering is a configuration option on a router - in this case, the CPE - if it is operating in NAT mode as
the WAN interface type (section 3.5.2). When an application uses a trigger port to build a connection, the
CPE will forward the data to the forward port.
To configure the feature, click on the check box next to Enable and then click on ADD LIST to enter the
service type, protocol, trigger port, and forward port (Figure 60).