ZyXEL Communications Corporation VMG1312B10C Manuel D’Utilisation

Chapter 10 Network Address Translation (NAT)

VMG1312-B10C User’s Guide

To add or edit an address mapping rule, click Add new rule or the rule’s edit icon in the Address 
Mapping screen to display the screen shown next. 

Address Mapping: Add/Edit

The following table describes the fields in this screen.

Type

This is the address mapping type.

One-to-One: This 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.

Many-to-One: This mode maps multiple local IP addresses to one global IP address. This is 
equivalent to SUA (i.e., PAT, port address translation), the Device's Single User Account 
feature that previous routers supported only. 

Many-to-Many: This mode maps multiple local IP addresses to shared global IP addresses.

Modify/Delete

Click the Edit icon to go to the screen where you can edit the address mapping rule.

Click the Delete icon to delete an existing address mapping rule. Note that subsequent 
address mapping rules move up by one when you take this action.

Network Setting > NAT > Address Mapping (continued)

Address Mapping: Add/Edit

Type

Choose the IP/port mapping type from one of the following.

One-to-One: This 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.

Many-to-One: This mode maps multiple local IP addresses to one global IP address. This is 
equivalent to SUA (i.e., PAT, port address translation), the Device's Single User Account 
feature that previous routers supported only. 

Many-to-Many: This mode maps multiple local IP addresses to shared global IP addresses.

Local Start IP

Enter the starting Inside Local IP Address (ILA).