ZyXEL Communications Prestige 643, User Manual

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Prestige 643 ADSL Router
Internet Access 3-15
FIELD DESCRIPTION EXAMPLE
My Password Enter the password associated with the login name above. *******
Single User Account
Choose Yes to enable or No to disable SUA. Please see the
following section for a more detailed discussion on the Single
User Account feature.
Yes
IP Address
Assignment
Press [
SPACE BAR
] to select Static or Dynamic address
assignment.
Dynamic
IP Address Enter the IP address supplied by your ISP if applicable. 192.168.1.1
ENET ENCAP
Gateway Enter the gateway IP address supplied by your ISP if
applicable. 192.168.1.100
When you have completed this menu, press [
ENTER
] at the prompt “Press ENTER to Confirm…” to save
your configuration, or press [
ESC
] at any time to cancel.
If all your settings are correct your Prestige should connect automatically to the Internet. If the connection
fails, note the error message that you receive on the screen and take the appropriate troubleshooting steps.
3.14 Single User Account
Typically, if there are multiple users on the LAN that want concurrent access to the Internet, you will have
to lease a block of legal or globally unique IP addresses from the ISP.
The Single User Account (SUA) feature allows you to have the same benefits as having multiple legal
addresses, but only pay for one IP address, thus saving significantly on the subscription fees. (Check with
your ISP before you enable this feature).
The IP address for the SUA can be either fixed or dynamically assigned by the ISP. In addition, you can
designate servers, e.g., a web server and a Telnet server, on your local network and make them accessible to
the outside world. If you do not define a server, SUA offers the additional benefit of firewall protection. If
no server is defined, all incoming inquiries will be filtered out by your Prestige, thus preventing intruders
from probing your network. Your Prestige accomplishes 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)).
3.14.1 Advantages of SUA
In summary:
z SUA is a cost-effective solution for small offices to access the Internet or other remote TCP/IP
networks.
z SUA supports servers accessible to the outside world.