Static ip addresses ipmaps – Netopia 6.3 User Manual
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Section 3
General
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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 service 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.
Static IP Addresses
If your Service Provider requires the Cayman Gateway to use Static IP
addressing, you must configure your Gateway for it. Dynamically assigned
addresses allow a service provider’s customer to install their Gateway with-
out WAN configuration. Static addresses never time out; dynamic
addresses time out and will be reassigned.
A static IP address is preferred for setting up and maintaining pinholes
through the Cayman Gateway’s NAT security facility.
Your Service Provider may not offer a static IP address option.
IPMaps
IPMaps supports one-to-one Network Address Translation (NAT) for IP
addresses assigned to servers, hosts, or specific computers on the LAN side
of the Cayman Gateway.
With IPMaps, a Service Provider-assigned static IP address is mapped to a
specific internal device. This allows a LAN-located device to appear public
without compromising other locally attached devices. The external IP
addresses must be on the same subnet.
IPMaps is used for applications such as Web, email, and FTP servers.
See How To: Configure for IPMaps on
for more information.