P-660HWP-Dx Support Notes
All contents copyright © 2007 ZyXEL Communications Corporation.
10
the local IP addresses as the Internal Local Addresses (ILA) and the global IP
addresses as the Inside Global Address (IGA),
One to One
: In One-to-One mode, the P-660HWP-Dx maps one ILA to
one IGA.
Many to One:
In Many-to-One mode, the P-660HWP-Dx maps multiple
ILA to one IGA. This is equivalent to SUA (i.e., PAT, port address
translation), ZyXEL's Single User Account feature that previous ZyNOS
routers supported (the SUA is optional in today's Prestige routers).
Many to Many Overload:
In Many-to-Many Overload mode, the
P-660HWP-Dx maps the multiple ILA to shared IGA.
Many One-to-One:
In Many One-to-One mode, the P-660HWP-Dx
maps each ILA to unique IGA.
Server:
In Server mode, the P-660HWP-Dx 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.
The following table summarizes the five types.
NAT Type
IP Mapping
One-to-One
ILA1<--->IGA1
Many-to-One
(SUA/PAT)
ILA1<--->IGA1
ILA2<--->IGA1
...
Many-to-Many
Overload
ILA1<--->IGA1
ILA2<--->IGA2
ILA3<--->IGA1
ILA4<--->IGA2
...
Many
One-to-One
ILA1<--->IGA1
ILA2<--->IGA2
ILA3<--->IGA3
ILA4<--->IGA4
...
Server
Server 1 IP<--->IGA1
Server 2 IP<--->IGA1
