Chapter 8 Network Address Translation (NAT)

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 ZyXEL Device’s address mapping settings, click Network > NAT > Address Mapping to open the following screen.

Figure 74 Network > NAT > Address Mapping

The following table describes the fields in this screen.

Table 47 Network > NAT > Address Mapping

LABEL

DESCRIPTION

#

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 Local End IP address. This field is N/A for One-to-oneand 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-Oneand

 

Server mapping types.

 

 

Global End IP

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

 

Many-to-One and Server mapping types.

Type

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.

 

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.

 

M-M Ov (Overload): Many-to-Many Overload mode maps multiple local IP

 

addresses to shared global IP addresses.

 

MM No (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.

 

 

Modify

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.

 

 

 

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P-660HN-F1 User’s Guide