ZyXEL Communications P-660HN-T1H User Manual

Chapter 9 Network Address Translation (NAT)

P-660HN-T1H User’s Guide

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

Figure 68   Network > NAT > Address Mapping: Edit 

The following table describes the fields in this screen.

Table 45   Network > NAT > Address Mapping: Edit 

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 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.