ZyXEL Communications ZyXEL ZyAIR 100 - Manual (Page 127)

ZyWALL 10~100 Series Internet Security Gateway
NAT 9-5
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 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
types.
The following table summarizes these types.
Table 9-2 NAT Mapping Types
TYPE IP MAPPING SMT ABBREVIATION
One-to-One ILA1 IGA1 1-1
Many-to-One (SUA/PAT) ILA1 IGA1
ILA2 IGA1
…
M-1
Many-to-Many Overload ILA1 IGA1
ILA2 IGA2
ILA3 IGA1
ILA4 IGA2
…
M-M Ov
Many-One-to-One ILA1 IGA1
ILA2 IGA2
ILA3 IGA3
…
M-1-1
Server Server 1 IP IGA1
Server 2 IP IGA1
Server 3 IP IGA1
Server