ZyAIR G-2000 Plus User’s Guide

 

Table 46 Address Mapping Edit

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

Local End IP

This is the end Inside Local IP Address (ILA). If your rule is for all local IP

 

 

addresses, then enter 0.0.0.0 as the Local Start IP address and

 

 

255.255.255.255 as the Local End IP address.

 

 

This field is N/A for One-to-Oneand Server mapping types.

 

 

 

 

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 ZyAIR.

 

 

 

 

Cancel

Click Cancel to return to the previous screen and not save your changes.

 

 

 

10.6 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 ZyAIR 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 ZyAIR's WAN port receives a response with a specific port number and protocol ("incoming" port), the ZyAIR 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.

10.6.1 Trigger Port Forwarding Example

The following is an example of trigger port forwarding.

Chapter 10 Single User Account (SUA) / Network Address Translation (NAT)

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