ZyXEL Communications ADSL2+ Ethernet/USB Gateway 660RU-Tx Series - Manual (Page 84)

Prestige 660RU-Tx Series User’s Guide
83 Chapter 7 Network Address Translation (NAT) Screens
7.7 Editing an Address Mapping Rule
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
The following table describes the labels in this screen.
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)
LABEL DESCRIPTION