ZyXEL Communications 2 Plus User Manual

 Chapter 17 Network Address Translation (NAT)

ZyWALL 2 Plus User’s Guide

Click the edit icon to display the NAT Address Mapping Edit screen. Use this screen to edit 
an address mapping rule. See 

 for information on NAT and address 

mapping.

Figure 220   ADVANCED > NAT > Address Mapping > Edit

Type

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.

2. 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. 

3. Many-to-Many Overload mode maps multiple local IP addresses to shared global 

IP addresses. 

4. Many One-to-One mode maps each local IP address to unique global IP 

addresses. 

5. Server 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. A window display 

asking you to confirm that you want to delete the address mapping rule. Note that 

subsequent address mapping rules move up by one when you take this action.

Insert

Click Insert to insert a new mapping rule before an existing one.

Table 96   ADVANCED > NAT > Address Mapping (continued)