ZyXEL Communications Corporation AMG1302 User Manual

 Chapter 9 Network Address Translation (NAT)

AMG1302-T10A User’s Guide

Note: The Address Mapping screen is available only when you select Full Feature in 

the NAT > General screen.

Ordering your rules is important because the Device applies the rules in the order that you specify. 

When a rule matches the current packet, the Device takes the corresponding action and the 

remaining rules are ignored. If there are any empty rules before your new configured rule, your 

configured rule will be pushed up by that number of empty rules. For example, if you have already 

configured rules 1 to 6 in your current set and now you configure rule number 9. In the set 

summary screen, the new rule will be rule 7, not 9. Now if you delete rule 4, rules 5 to 7 will be 

pushed up by 1 rule, so old rules 5, 6 and 7 become new rules 4, 5 and 6. 

To change your Device’s address mapping settings, click Network > NAT > Address Mapping to 

open the following screen.

Network > NAT > Address Mapping

The following table describes the fields in this screen.

Network > NAT > Address Mapping

#

This is the rule index number.

Local Start IP

This is the starting Inside Local IP Address (ILA). Local IP addresses are N/A for Server 

port mapping.

Local End IP

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

this field displays 0.0.0.0 as the Local Start IP address and 255.255.255.255 as the 

 address. This field is N/A for One-to-one and Server mapping types.

Global Start IP

This is the starting Inside Global IP Address (IGA). Enter 0.0.0.0 here if you have a 

dynamic IP address from your ISP. You can only do this for Many-to-One and Server 

mapping types. 

Global End IP

This is the ending Inside Global IP Address (IGA). This field is N/A for One-to-one, 

 and Server mapping types.