Nat Mapping Types; Table 7-1 Nat Mapping Types - ZyXEL Communications Prestige 202 User Manual

7.1.3 NAT Mapping Types

NAT supports five types of IP/port mapping. They are:
1. One to One: In One-to-One mode, the Prestige maps one local IP address to one global IP address.
2. Many to One: In Many-to-One mode, the Prestige 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 (the SUA Only option in today's routers).
3. Many to Many Overload: In Many-to-Many Overload mode, the Prestige maps the multiple local IP
addresses to shared global IP addresses.
4. Many to Many No Overload: In Many-to-Many No Overload mode, the Prestige maps each local IP
addresses to unique global IP addresses.
5. Server: This type allows us to specify multiple inside servers of different types behind the NAT.
NOTE: Port numbers do not change for One-to-One and Many-to-Many-No Overload NAT
The following table summarizes these types.
One-to-One
Many-to-One (SUA/PAT)
Many-to-Many Overload
Many-to-Many No Overload
Server
NAT

Table 7-1 NAT Mapping Types

TYPE
ILA1ßà IGA1
ILA1ßà IGA1
ILA2ßà IGA1
...
ILA1ßà IGA1
ILA2ßà IGA2
ILA3ßà IGA1
ILA4ßà IGA2
...
ILA1ßà IGA1
ILA2ßà IGA2
ILA3ßà IGA3
...
Server 1 IPßà IGA1
Server 2 IPßà IGA1
Server 3 IPßà IGA1
mapping types.
IP MAPPING
Prestige 202 ISDN Router
SMT ABBREVIATION
1:1
M:1
M:M Ov
M:M No Ov
Server
7-3