ZyXEL Communications P-870HW-I User Manual

P-870HW-I1 User’s Guide

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Chapter 29 NAT Setup

The following table describes the labels in this menu.

Use this menu to look at servers for which you have configured port forwarding rules. See 

 for background information. To open this menu, enter 2 in menu 15.

Table 133   Menu 15.1.1.1: 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. This is equivalent to SUA (i.e., PAT, port address 

translation), ZyXEL's Single User Account feature that previous ZyXEL 

routers supported only. 

•

Many-to-Many Overload: Many-to-Many Overload mode maps multiple 

local IP addresses to shared global IP addresses. 

•

Many-to-Many No Overload: Many-to-Many No Overload mode maps 

each local IP address to unique global IP addresses. 

•

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

behind the NAT to be accessible to the outside world.

Local IP:
Start
End

Enter the range of IP addresses on the LAN port.
Local Start IP is N/A for Server port mapping.
Local End IP is N/A for One-to-one and Server mapping types.
To create a rule for all LAN IP addresses, set Local Start IP to 0.0.0.0 and 

Local End IP to 255.255.255.255.

Global IP:
Start
End

This is the corresponding range of IP addresses on the WAN port.
Global Start IP should be 0.0.0.0 if both of the following conditions are 

satisfied.
•

Your ISP assigns the IP address of your WAN port.

•

The  rule  is  a  Many-to-One or Server rule.

Global End IP is N/A for One-to-one, Many-to-One and Server mapping 

types.