ZyXEL Communications P-660R-Tx v2 Series User Manual

P-660R-Tx v2 Series User’s Guide

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Chapter 7 Network Address Translation (NAT) Screens

To edit an address mapping rule, click the rule’s link in the NAT Address Mapping Rules 
screen to display the screen shown next.  

Figure 29   Address Mapping Rule Edit

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. 

Back

Click Back to return to the NAT Mode screen.

Table 19   Address Mapping Rules (continued)