ZyXEL Communications Prestige 28641 - Manual (Page 61)

Configuring for Internet Access 47
In summary:
1. 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.
2. SUA can provide one server address to be accessed by Remote
Dial-in Users, thus controlling the incoming packets.
3. SUA can provide firewall protection if you do not configure a
server IP address. All incoming inquiries will be filtered out by the
Prestige. Therefore, servers on your network are protected.
4. UDP and TCP datagrams can be routed. In addition, ICMP echo
can also be routed.
The figure below shows an example of a small office connected to the
Internet via a Single User Account using the Prestige. Note that if you
enable the Single User Account feature, your local IP address MUST
be selected from the list of IP addresses for private networks as defined
by the IANA.
Figure 4-3 A Single User Account Using the Prestige