Configuring Nat; Nat Overview; Introduction To Nat - Cisco PIX 500 Series Configuration Manual

Security appliance command line

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Table of Contents

Configuring NAT

This chapter describes Network Address Translation, and includes the following sections:

This section describes how NAT works on the security appliance, and includes the following topics:

Address translation substitutes the real address in a packet with a mapped address that is routable on the

destination network. NAT is composed of two steps: the process by which a real address is translated

into a mapped address, and the process to undo translation for returning traffic.

The security appliance translates an address when a NAT rule matches the traffic. If no NAT rule

matches, processing for the packet continues. The exception is when you enable NAT control.

NAT control requires that packets traversing from a higher security interface (inside) to a lower security

NAT Overview, page 17-1

Configuring NAT Control, page 17-16

Using Dynamic NAT and PAT, page 17-17

Using Static NAT, page 17-26

Using Static PAT, page 17-27

Bypassing NAT, page 17-30

NAT Examples, page 17-34

Introduction to NAT, page 17-1

NAT Control, page 17-4

NAT Types, page 17-6

Policy NAT, page 17-10

NAT and Same Security Level Interfaces, page 17-13

Order of NAT Commands Used to Match Real Addresses, page 17-14

Mapped Address Guidelines, page 17-14

DNS and NAT, page 17-15

C H A P T E R

Cisco Security Appliance Command Line Configuration Guide

Asa 5500 series