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Configuring for Internet Access 35
This feature may also be used to connect to TCP/IP remote nodes
other than Internet Service Providers. For example this feature can be
used to simplify the allocation of IP addresses when connecting branch
offices to the corporate network.
The IP address for the Single User Account can be either fixed or
dynamically assigned by the ISP (or other remote node). In addition,
you can also configure a server, e.g., a Web server, on your local
network and make it accessible by outside users.
If you do not set a server IP address, SUA offers the additional benefit
of firewall protection. This is because if no server is defined, all
incoming inquiries will be filtered out by your Prestige even if you do
have a server on your network. This can prevent intruders from probing
your system.
Your Prestige accomplishes this address sharing by translating the
internal LAN IP addresses to a single address that is globally unique on
the Internet. For more information on IP address translation, refer to
RFC 1631, The IP Network Address Translator (NAT).
In summary:
• SUA is an ideal, cost-effective solution for small offices with less
than 20 hosts using a LAN to concurrently access the Internet or
other remote TCP/IP network.
• SUA can provide one server address to be accessed by Remote
Dial-in Users, thus controlling the incoming packets.
• SUA can provide firewall protection if you do not configure a
server IP address. All incoming inquiries will be filtered out by your
Prestige. Therefore, servers on your network are protected.