ZyXEL Communications ZyWall 35 Support Notes page 25

One to One
1.
In One-to-One mode, the ZyWALL maps one ILA to one IGA.
Many to One
2.
In Many-to-One mode, the ZyWALL 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 only option in today's routers).
Many to Many Overload
3.
In Many-to-Many Overload mode, the ZyWALL maps the multiple ILA to shared IGA.
Many One to One
4.
In Many One to One, the ZyWALL maps each ILA to unique IGA.
Server
5.
In Server mode, the ZyWALL 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 these types.
NAT Type
One-to-One
Many-to-One
(SUA/PAT)
Many-to-Many
Overload
Many One-to-One
Server
•
SUA Versus Multi-NAT
IP Mapping
ILA1<--->IGA1
ILA1<--->IGA1
ILA2<--->IGA1
...
ILA1<--->IGA1
ILA2<--->IGA2
ILA3<--->IGA1
ILA4<--->IGA2
...
ILA1<--->IGA1
ILA2<--->IGA2
ILA3<--->IGA3
ILA4<--->IGA4
...
Server 1 IP<--->IGA1
Server 2 IP<--->IGA1
All contents copyright (c) 2006 ZyXEL Communications Corporation.
ZyWALL 35 Support Notes
25