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Prestige 324 User’s Guide
NAT Screens
7-13
Table 7-6 Address Mapping Edit
LABEL DESCRIPTION
Global Start IP
This is the starting Inside Global IP Address (IGA). Enter 0.0.0.0 here if you have a
dynamic IP address from your ISP.
Global End IP
This is the ending Inside Global IP Address (IGA). This field is
N/A
for
One-to-One
,
Many-to-One
and
Server
mapping types.
Apply
Click
Apply
to save your changes back to the Prestige.
Cancel
Click
Cancel
to return to the previous screen and not save your changes.
7.6 Trigger Port Forwarding
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 Prestige records the IP address of a LAN computer that sends traffic to the WAN to
request a service with a specific port number and protocol (a "trigger" port). When the Prestige's WAN port
receives a response with a specific port number and protocol ("incoming" port), the Prestige forwards the
traffic to the LAN IP address of the computer that sent the request. After that computer’s connection for that
service closes, another computer on the LAN can use the service in the same manner. This way you do not
need to configure a new IP address each time you want a different LAN computer to use the application.
7.6.1 Trigger Port Forwarding Example
The following is an example of trigger port forwarding.
Figure 7-7 Trigger Port Forwarding Process: Example
Summary of Contents for P-324
Page 1: ...Prestige 324 Intelligent Broadband Sharing Gateway User s Guide Version V3 61 JF 0 April 2004 ...
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Page 87: ...Prestige 324 User s Guide WAN Screens 6 17 Figure 6 10 Dial Backup Setup ...
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Page 171: ...Prestige 324 User s Guide Maintenance 13 11 Figure 13 14 Restart ...
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Page 310: ...IX Part IX Appendices and Index This section provides some Appendices and an Index ...
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