Netopia 2200 - Manual (Page 337)

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Simplified Local Area Network Setup
• Your network may change address with each connection making it more difficult to
attack.
When you configure Instant On access, you can also configure an idle time-out value. Your
Gateway monitors traffic over the Internet link and when there has been no traffic for the
configured number of seconds, it disconnects the link.
When new traffic that is destined for the Internet arrives at the Gateway, the Gateway will
instantly re-establish the link.
Your ser vice provider may be using a system that assigns the Internet address of your
Gateway out of a pool of many possible Internet addresses. The address assigned varies
with each connection attempt, which makes your network a moving target for any attacker.
Simplified Local Area Network Setup
DHCP (Dynamic Host Configuration Protocol) Server
DHCP Ser ver functionality enables the Gateway to assign to your LAN computer(s) a “pri-
vate” IP address and other parameters that allow network communication. The default
DHCP Ser ver configuration of the Gateway suppor ts up to 253 LAN IP addresses.
This feature simplifies network administration because the Gateway maintains a list of IP
address assignments. Additional computers can be added to your LAN without the hassle
of configuring an IP address.
DNS Proxy
Domain Name System (DNS) provides end users with the ability to look for devices or web
sites by typing their names, rather than IP addresses. For web sur fers, this technology
allows you to enter the URL (Universal Resource Locator) as text to sur f to a desired web-
site.
The Netopia DNS Proxy feature allows the LAN-side IP address of the Gateway to be used
for proxying DNS requests from hosts on the LAN to the DNS Ser vers configured in the
gateway. This is accomplished by having the Gateway's LAN address handed out as the
“DNS Ser ver” to the DHCP clients on the LAN.