Chapter 10 Network Address Translation (NAT)

Table 25 Network > NAT > Address Mapping (continued)

LABEL

DESCRIPTION

Address Mapping List

 

 

Rule

This is the rule’s index number.

 

 

Type

1-1: One-to-One mode maps one local IP address to one public 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 public IP address.

 

This is equivalent to the Single IP feature that previous ZyXEL routers supported

 

only.

 

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

 

addresses to shared public IP addresses.

 

MM No (No Overload): Many-to-Many No Overload mode maps each local IP

 

address to unique public 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 inside local IP address. Local IP addresses are N/A for Server

 

port mapping.

 

 

Local End IP

This is the ending inside local IP address. 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.

 

 

Public Start IP

This is the starting inside public IP address. 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.

 

 

Public End IP

This is the ending inside public IP address. This field is N/A for One-to-one, Many-

 

to-Oneand Server mapping types.

SAVE

Click this to save your changes.

 

 

DELETE

Click this to remove the rule.

 

 

BACK

Click this to return to the previous screen without saving.

 

 

CANCEL

Click this to restore your previously saved settings.

 

 

10.6 NAT Technical Reference

This section contains more information regarding NAT.

10.6.1 NAT Definitions

Inside/outside denotes where a host is located relative to the ZyXEL Device, for example, the computers of your subscribers are the inside hosts, while the web servers on the Internet are the outside hosts.

Public/local denotes the IP address of a host in a packet as the packet traverses a router, for example, the local address refers to the IP address of a host when the packet is in the local network, while the public address refers to the IP address of the host when the same packet is traveling in the WAN side.

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P-660R-T1 v3 User’s Guide