User`s manual

P-660 Series Support Notes
43
All contents copyright © 2005 ZyXEL Communications Corporation.
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 P-660 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 different types. The P-660 supports NAT sets on a remote node
basis. They are reusable, but only one set is allowed for each remote node. The P-660
supports 8 sets since there are 8 remote node. The default SUA (Read Only) Set in
menu 15.1 is a convenient, pre-configured, read only, Many-to-One mapping set,
sufficient for most purposes and helpful to people already familiar with SUA in
previous ZyNOS versions.
SMT Menus
Applying NAT in the SMT Menus
You apply NAT via menus 4 and 11.3 as displayed next. The next figure how you
apply NAT for Internet access in menu 4. Enter 4 from the Main Menu to go to Menu