ZyXEL Communications 128L user manual Configuring for Internet Access

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.

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