ZyXEL Communications P-870HN-5xb Support Notes page 50

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NAT Mapping Types
The NAT supports five types of IP/port mapping. They are:
1. One to One
In One-to-One mode, the Prestige maps one ILA to one IGA.
2. Many to One
In Many-to-One mode, the CPE maps multiple ILAs to one IGA.
3. Many to Many Overload
In Many-to-Many Overload mode, the CPE maps the multiple ILAs to shared IGA.
4. Many to Many No Overload
In Many-to-Many No Overload mode, the CPE maps each ILA to unique IGA.
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Server (DMZ host)
In Server mode (DMZ host), the CPE maps multiple inside servers to one global IP
address. This allows us to specify multiple servers of different types behind the NAT
for outside access. Note: If you want to map each server to one unique IGA, please
use the One-to-One mode.
All contents copyright (c) 2009 ZyXEL Communications Corporation.
P-870HN-5xb Support Notes