Netopia 6.3 - Manual (Page 52)

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Section 4 Configure
Configure the IPMaps Feature
FAQs for the IPMaps Feature
Before configuring an example of an IPMaps-enabled network, review
these frequently asked questions.
What are IPMaps and how are they used?
The IPMaps feature allows multiple static WAN IP addresses to be
assigned to the Cayman Gateway.
Static WAN IP addresses are used to support specific services, like a web
server, mail server, or DNS server. This is accomplished by mapping a sepa-
rate static WAN IP address to a specific internal LAN IP address. All traffic
arriving at the Gateway intended for the static IP address is transferred to
the internal device. All outbound traffic from the internal device appears to
originate from the static IP address.
Locally hosted servers are supported by a public IP address while LAN users
behind the NAT-enabled IP address are protected.
IPMaps is compatible with the use of NAT, with either a statically assigned
IP address or DHCP/PPP served IP address for the NAT table.
Link IPMaps
Comment
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.
A single static or dynamic (DHCP) WAN IP address must be assigned to
support other devices on the LAN. These devices utilize Cayman’s default
NAT/PAT capabilities.
Response