User's Manual

Prestige 100L IDSL Router
3-8 Internet Access
The following table describes this screen.
Table 3-3 Internet Access Setup Menu Fields
FIELD DESCRIPTION
ISP’s Name Enter the name of your Internet Service Provider, e.g., myISP. This
information is for identification purposes only.
My Login Enter the login name given to you by your ISP.
My Password Enter the password associated with the login name above.
Single User Account
Please refer to the following section for a more detailed discussion on the
Single User Account feature. The default value is Yes.
IP Address
Please refer to the following section for a more detailed discussion on setting
the IP Address under a Single User Account.
3.4 Single User Account (SUA)
Typically, if there are multiple users on the LAN wanting to concurrently access the Internet, you 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). SUA supports popular Internet applications such as MS traceroute,
CuSeeMe, IRC, RealAudio, VDOLive, Quake and PPTP with no extra configuration needed.
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 any server, SUA offers the additional benefit of firewall protection. If
no server is defined, all incoming inquiries are filtered out by your Prestige, thus preventing intruders from
probing your network. 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).
3.4.1 Advantages of SUA
l SUA is an ideal, cost-effective solution for small offices to access the Internet or other remote TCP/IP
networks.
l SUA supports servers to be accessible to the outside world.
l SUA can provide firewall protection if you do not specify a server. All incoming inquiries are filtered
out by your Prestige.
l UDP and TCP packets can be routed. In addition, partial ICMP, including echo and traceroute, is also
supported.