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Dhcp server with nat configuration example – Paradyne 9788 User Manual

Page 116

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5. Configuring the FrameSaver DSL Router

5-12

December

2002

9700-A2-GB20-20

DHCP Server with NAT Configuration Example

In this DHCP Server with NAT example:

The clients are using dynamic IP address assignment and use the Ethernet
interface of the router as the next hop router (default gateway).

The DHCP server assigns private IP addresses which are converted to public
IP addresses by NAT.

The DSL interface must be numbered.

The router is configured as the DHCP server giving the private IP addresses
to the clients.

The Ethernet interface is in private address space. NAT is used for one-to-one
mapping of addresses.

The command line syntax for this example, where

x is the number configured for

the sub-interface, is:

ip nat pool public 192.128.22.1 netmask 255.255.255.0

access-list 1 permit 10.1.1.0 0.0.0.255

ip nat inside source list 1 pool public

interface ethernet 0

ip nat inside

interface serial 0.

x

ip nat outside

Public IP Addresses for NAT

Private IP Addresses

192.128.22.1

10.1.3.2

192.128.22.2

10.1.3.3

. . .

. . .

192.128.22.nnn

10.1.3.nnn

NAT with DHCP Server

01-16924

NAT

Private IP

Address

Public IP

Addresses

DHCP

Pool

Public

Network

Ethernet

Private

Network

FrameSaver xDSL Router

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