ZyXEL Communications P-2900-4HB User Manual

Chapter 6 Network Address Translation (NAT) Screens

P-2900-4HB User’s Guide

Use this screen to edit an address mapping rule. Click the rule’s link in the NAT 
Address Mapping Rules screen to display the screen shown next. 

Figure 19   Edit Address Mapping Rule 

The following table describes the fields in this screen. 

Table 12   Edit Address Mapping Rule 

Type

Choose the port mapping type from one of the following. 

• One-to-One: One-to-One mode maps one local IP address to one 

global IP address. Note that port numbers do not change for One-to-

one NAT mapping type.

• Many-to-One: Many-to-One mode maps multiple local IP addresses 

to one global IP address.

• Server: This type allows you to specify inside servers of different 

services behind the NAT to be accessible to the outside world.

Local Start IP This is the starting local IP address (ILA). Local IP addresses are N/A for 

Server port mapping.

Local End IP

This is the end 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-One and Server mapping types.

Global Start 
IP

This is the starting 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 global IP address (IGA). This field is N/A for One-to-

One, Many-to-One and Server mapping types.

Server 
Mapping Set

Only available when Type is set to Server. 

Select a number from the drop-down menu to choose a server set from 
the NAT - Address Mapping Rules screen.

Edit Details

Click this link to go to the NAT - Edit NAT Server Set screen to edit a 
server set that you have selected in the Server Mapping Set field.