Chapter 11 Network Address Translation (NAT)
VMG1312-Bx0D User’s Guide
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11.3.1 Add New Application
This screen lets you create new NAT application rules. Click Add New Application in the
Applications screen to open the following screen.
Figure 81 Applications: Add
The following table describes the labels in this screen.
11.4 The Port Triggering Screen
Some services use a dedicated range of ports on the client side and a dedicated range of ports on
the server side. With regular port forwarding you set a forwarding port in NAT to forward a service
(coming in from the server on the WAN) to the IP address of a computer on the client side (LAN).
The problem is that port forwarding only forwards a service to a single LAN IP address. In order to
use the same service on a different LAN computer, you have to manually replace the LAN
computer's IP address in the forwarding port with another LAN computer's IP address.
Trigger port forwarding solves this problem by allowing computers on the LAN to dynamically take
turns using the service. The VMG records the IP address of a LAN computer that sends traffic to the
Table 58 Applications: Add
LABEL DESCRIPTION
WAN Interface Select the WAN interface that you want to apply this NAT rule to.
Server IP
Address
Enter the inside IP address of the application here.
Application
Category
Select the category of the application from the drop-down list box.
Application
Forwarded
Select a service from the drop-down list box and the VMG automatically configures the
protocol, start, end, and map port number that define the service.
View Rules Click this to display the configuration of the service that you have chosen in Application
Fowarded.
OK Click OK to save your changes.
Cancel Click Cancel to exit this screen without saving.
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