ZyXEL Communications P-870HW-I User Manual

P-870HW-I1 User’s Guide

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Chapter 10 NAT

The following table describes the fields in this screen.

Use this screen to activate, deactivate, and edit each address mapping rule in the ZyXEL 
Device. To open this screen, click an Edit icon in Network > NAT > Address Mapping.

Figure 81   Network > NAT > Address Mapping > Edit

Table 62   Network > NAT > Address Mapping

#

This is the rule index number.

Local Start IP
Local End IP

This is the range of IP addresses on the LAN port.
Local Start IP is N/A for Server port mapping.
Local End IP is N/A for One-to-one and Server mapping types.

Global Start IP
Global End IP

This is the corresponding range of IP addresses on the WAN port.
Global Start IP should be 0.0.0.0 if both of the following conditions are satisfied.
•

Your ISP assigns the IP address of your WAN port.

•

The rule is a Many-to-One or Server rule.

Global End IP 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

This column provides icons to edit and delete rules.
To edit a rule, click the Edit icon next to the rule. The Address Mapping Edit screen 

appears.
To delete a rule, click the Remove icon next to the rule. All the information in the rule 

returns to the default settings.