Using Nat; Table 8-2 Nat Mapping Types - ZyXEL Communications ZYWALL2 ET 2WE User Manual

ZyWALL 2 Series User's Guide
Many to One: In Many-to-One mode, the ZyWALL maps multiple local IP addresses to one global
IP address. This is equivalent to SUA (i.e., PAT, port address translation), the Single User Account
feature (the SUA Only option).
Many to Many Overload: In Many-to-Many Overload mode, the ZyWALL maps the multiple
local IP addresses to shared global IP addresses.
Many One to One: In Many-One-to-One mode, the ZyWALL maps each local IP address to a
unique global IP address.
Server: This type allows you to specify inside servers of different services behind the NAT to be
accessible to the outside world. Port numbers do not change for One-to-One and Many-One-to-
One NAT mapping types.
TYPE
One-to-One
Many-to-One (SUA/PAT)
Many-to-Many Overload
Many-One-to-One
Server
The following table summarizes these types.
8.2

Using NAT

You must create a firewall rule in addition to setting up SUA/NAT, to allow traffic
8-4

TABLE 8-2 NAT MAPPING TYPES

IP MAPPING
ILA1
ILA1
ILA2
ILA1
ILA2
ILA3
ILA4
ILA1
ILA2
ILA3
Server 1 IP
Server 2 IP
Server 3 IP
from the WAN to be forwarded through the ZyWALL.
IGA1
IGA1
IGA1
...
IGA1
IGA2
IGA1
IGA2
...
IGA1
IGA2
IGA3
...
IGA1
IGA1
IGA1
SMT ABBREVIATION
1-1
M-1
M-M Ov
M-1-1
Server
NAT