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Prestige 2802HW(L)-Ix Support Notes
All contents copyright (c) 2007 ZyXEL Communications Corporation.
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5. Many to Many No Overload
In Many-to-Many No Overload mode, the Prestige maps each ILA to unique IGA.
• Server
In Server mode, the Prestige 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 IP Mapping
Mapping
Direction
One-to-One ILA1<--->IGA1 Both
Many-to-One (SUA/PAT)
ILA1---->IGA1
ILA2---->IGA1
...
Outgoing
Many-to-Many Overload
ILA1---->IGA1
ILA2---->IGA2
ILA3---->IGA1
ILA4---->IGA2
...
Outgoing
Many-to-Many No
Overload
(Allocate by Connections)
ILA1---->IGA1
ILA2---->IGA3
ILA3---->IGA2
ILA4---->IGA4
...
Outgoing
Server
Server 1 IP<----IGA1
Server 2 IP<----IGA1
Incoming
• SUA Versus NAT
SUA (Single User Account) in previous ZyNOS versions is a NAT set with 2 rules, Many-to-One and Server.
The Prestige now has Full Feature NAT support to map global IP addresses to local IP addresses of clients or
servers. With multiple global IP addresses, multiple severs of the same type (e.g., FTP servers) are allowed on
the LAN for outside access. In previous ZyNOS versions (that supported SUA 'visible' servers had to be of