Sua (Single User Account) Versus Nat; Sua Server - ZyXEL Communications Prestige 662HW Series User Manual

Prestige 662HW Series User's Guide
Many-to-Many Overload
Many-to-Many No Overload
Server
8.2

SUA (Single User Account) Versus NAT

SUA (Single User Account) is a ZyNOS implementation of a subset of NAT that supports two types
of mapping, Many-to-One and Server. The Prestige also supports Full Feature NAT to map
multiple global IP addresses to multiple private LAN IP addresses of clients or servers using mapping
types as outlined in Table 8-2.
♦
Choose SUA Only if you have just one public WAN IP address for your Prestige.
♦ Choose Full Feature if you have multiple public WAN IP addresses for your Prestige.
8.3

SUA Server

A SUA server set is a list of inside (behind NAT on the LAN) servers, for example, web or FTP, that
you can make visible to the outside world even though SUA makes your whole inside network appear
as a single computer to the outside world.
You may enter a single port number or a range of port numbers to be forwarded, and the local IP
address of the desired server. The port number identifies a service; for example, web service is on port
80 and FTP on port 21. In some cases, such as for unknown services or where one server can support
more than one service (for example both FTP and web service), it might be better to specify a range of
port numbers. You can allocate a server IP address that corresponds to a port or a range of ports.
Many residential broadband ISP accounts do not allow you to run any server processes (such as a Web
or FTP server) from your location. Your ISP may periodically check for servers and may suspend your
account if it discovers any active services at your location. If you are unsure, refer to your ISP.
Default Server IP Address
In addition to the servers for specified services, NAT supports a default server IP address. A default
server receives packets from ports that are not specified in this screen.
8-4
Table 8-2 NAT Mapping Types
TYPE IP MAPPING
ILA2
...
ILA1
ILA2
ILA3
ILA4
...
ILA1
ILA2
ILA3
...
Server 1 IP
Server 2 IP
Server 3 IP
SMT ABBREVIATION
IGA1
IGA1 M:M Ov
IGA2
IGA1
IGA2
IGA1 M:M No OV
IGA2
IGA3
IGA1 Server
IGA1
IGA1
Network Address Translation (NAT) Screens