P-320W User’s Guide
106
Chapter 8 Network Address Translation (NAT)
The following table describes the labels in this screen.
Table 44
NAT: Port Forwarding: Rule Setup
LABEL
DESCRIPTION
Active
Select the check box to enable this port forwarding entry.
Clear the checkbox to disallow forwarding of these ports to an inside server without
having to delete the entry.
Service Name
Type a
Service Name
to identify this port-forwarding rule.
Start Port
Type a start port number. To forward only one port, enter it again in the
End Port
field. To specify a range of ports, enter the last port to be forwarded in the
End
Port
field.
End Port
Type an end port number.
Server IP Address Type the inside IP address of the server.
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.
8.4 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.
8.4.1 Trigger Port Forwarding Example
The following is an example of trigger port forwarding.
Summary of Contents for P-320W
Page 1: ...P 320W 802 11g Wireless Firewall Router User s Guide Version 1 00 11 2005 Edition 1...
Page 2: ......
Page 10: ...P 320W User s Guide 10 Customer Support...
Page 24: ...P 320W User s Guide 24...
Page 34: ...P 320W User s Guide 34 Chapter 1 Getting to Know Your Prestige...
Page 44: ...P 320W User s Guide 44 Chapter 2 Introducing the Web Configurator...
Page 60: ...P 320W User s Guide 60 Chapter 3 Connection Wizard...
Page 80: ...P 320W User s Guide 80 Chapter 4 Wireless LAN...
Page 92: ...P 320W User s Guide 92 Chapter 5 WAN...
Page 118: ...P 320W User s Guide 118 Chapter 10 Static Route Screens...
Page 140: ...P 320W User s Guide 140 Chapter 13 System...
Page 149: ...P 320W User s Guide Chapter 15 Tools 149 Figure 99 System Restart...
Page 150: ...P 320W User s Guide 150 Chapter 15 Tools...
Page 172: ...P 320W User s Guide 172 Appendix B IP Subnetting...
