Table 12-2 Nat Mapping Types - ZyXEL Communications 10 User Manual

2. 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), ZyXEL's Single User Account
feature (the SUA Only option).
3. Many to Many Overload: In Many-to-Many Overload mode, the ZyWALL maps the multiple local IP
addresses to shared global IP addresses.
4. Many One to One: In Many-One-to-One mode, the ZyWALL maps each local IP address to a unique
global IP address.
5. Server: This type allows you to specify inside servers of different services behind the NAT to be
accessible to the outside world although, it is highly recommended that you use the DMZ port for these
servers instead.
Port numbers do not change for One-to-One and Many-One-to-One NAT mapping
The following table summarizes these types.
One-to-One
Many-to-One (SUA/PAT)
Many-to-Many Overload
NAT

Table 12-2 NAT Mapping Types

TYPE
ILA1
ILA1
ILA2
...
ILA1
ILA2
ILA3
ILA4
...
ZyWALL 10~100 Series Internet Security Gateway
types.
IP MAPPING
IGA1
IGA1
IGA1
IGA1
IGA2
IGA1
IGA2
SMT ABBREVIATION
1-1
M-1
M-M Ov
12-5