Using Nat; Table 63 Nat Mapping Types - ZyXEL Communications ZyWall P1 User Manual

• One to One: In One-to-One mode, one local IP address is mapped to one global IP
address.
• 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),
ZyWALL's Single User Account feature.
• Many to Many Overload: In Many-to-Many Overload mode, multiple local IP
addresses are mapped to shared global IP addresses.
• Many One to One: In Many-One-to-One mode, each local IP address is mapped 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.
Note: Port numbers do not change for One-to-One and Many-One-to-One NAT
mapping types.
The following table summarizes these types.

Table 63 NAT Mapping Types

TYPE
One-to-One
Many-to-One (SUA/PAT)
Many-to-Many Overload
Many-One-to-One
Server

11.2 Using NAT

Note: You must create a firewall rule in addition to setting up NAT, to allow traffic from
the WAN to be forwarded through the ZyWALL.
Chapter 11 Network Address Translation (NAT)
IP MAPPING
ILA1 IGA1
ILA1 IGA1
ILA2 IGA1
...
ILA1 IGA1
ILA2 IGA2
ILA3 IGA1
ILA4 IGA2
...
ILA1 IGA1
ILA2 IGA2
ILA3 IGA3
...
Server 1 IP IGA1
Server 2 IP IGA1
Server 3 IP IGA1
ZyWALL P1 User's Guide
ABBREVIATION
1-1
M-1
M-M Ov
M-1-1
Server
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