ZyXEL Communications P-2302R Series User Manual

P-2302R Series User’s Guide

Chapter 12 Network Address Translation (NAT) Screens

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Figure 50   Address Mapping

The following table describes the labels in this screen.

Table 36   Address Mapping

Local Start IP

This refers to the Inside Local Address (ILA), which is the starting local IP address. If 

the rule is for all local IP addresses, then this field displays 0.0.0.0 as the Local Start 

IP address. Local IP addresses are N/A for Server port mapping.

Local End IP

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

this field displays 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 refers to the Inside Global IP Address (IGA). 0.0.0.0 is for a dynamic IP address 

from your ISP with Many-to-One and Server mapping types. 

Global End IP

This is the end Inside Global Address (IGA). 
This field is N/A for One-to-One, Many-to-One and Server mapping types.

Type

1. 1-1 (One-to-One) mode maps one local IP address to one global IP address. Note 

that port numbers do not change for the One-to-One NAT mapping type.
2. M-1 (Many-to-One) mode maps multiple local IP addresses to one global IP 

address. This is equivalent to SUA (i.e., PAT, port address translation), ZyXEL's 

Single User Account feature that previous ZyXEL routers supported only.  
3. M-M-Ov (Many-to-Many Overload) mode maps multiple local IP addresses to 

shared global IP addresses. 
4. M-1-1 (Many One-to-One) mode maps each local IP address to unique global IP 

addresses. 
5. Server allows you to specify inside servers of different services behind the NAT to 

be accessible to the outside world.

Insert 

Click Insert to insert a new mapping rule before an existing one.