Enhancements - Netopia R6100 Reference Manual

Complex maps
Map lists and server lists are completely independent of each other. A Connection Profile can use one or the
other or both.
MultiNAT allows complex mapping and requires more complex configuration than in earlier firmware versions.
Multiple mapped interior subnets are supported, and the rules for mapping each of the subnets may be
different. The figure below illustrates a possible multiNAT configuration.
Public Addresses
206.1.1.1
206.1.1.2
206.1.1.3
206.1.1.4
206.1.1.5
206.1.1.6
206.1.2.1 – 6
(possible later)
In order to support this type of mapping, you define two address ranges. First, you define a public range which
contains the first and last public address to be used and the way in which these addresses should be used
(PAT, static, or dynamic). You then configure an address map which defines the private IP address or addresses
to be used and which public range they should be mapped to. You add the address map to the list of address
maps which are configured, creating a map list. The mappings in the map list are order-dependent and are
compared in order from the top of the list to the bottom. If a particular resource is not available, subordinate
mappings can be defined that will redirect traffic.

Enhancements

In firmware versions previous to version 4.4, NAT had a single public IP address that was always associated
with the Connection Profile's WAN IP address. This was always the PAT public address and the exported
services public address. Beginning with firmware version 4.5, this association was no longer required. The
current version permits multiple public addresses, none of which have to be the same as the Connection Profile
WAN IP address. Any public addresses not associated with the Connection Profile WAN IP address must have a
static route pointing to it from a router on the public network if public users are expected to be able to access
the NATed machines or services. The multiple NAT feature enhancements in the Netopia R6000 Series include
the following:
Default behavior consistent with previous firmware versions, including PAT to a DHCP- or PPP-assigned
address.
1:1 Dynamically Assigned NAT Mapping. This allows internal addresses to be temporarily assigned a public
IP address to use for NAT. When the private host is finished communicating, the public IP address is made
available for use by other internal hosts again.
Multiple Network Address Translation (MultiNAT) 11-5
Private Addresses
192.168.1.253
192.168.1.254
}
192.168.1.1 – 252
192.168.1.1 – 252
192.168.1.1 – 252
IP Host
Web/FTP Server
Email Server
LAN Users
LAN Users
LAN Users
NAT Type
1:1 Static
1:1 Static
1:1 Dynamic
1:Many PAT
1:1 Dynamic