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Chapter 8 Network Address Translation (NAT) Screens 127
BCM50a Integrated Router Configuration — Basics
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 can 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 is 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.
With many residential broadband ISP accounts you cannot run any server
processes (such as a Web or FTP server) from your location. Your ISP
periodically checks for servers and can 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.
Note: If you do not assign a Default Server IP Address, the BCM50a
Integrated Router discards all packets received for ports that are not
specified here or in the remote management setup.