Cisco Systems ASA 5580 Manual De Usuario
C H A P T E R
3-1
Cisco ASA Series Firewall CLI Configuration Guide
3
Information About NAT
This chapter provides an overview of how Network Address Translation (NAT) works on the ASA. This
chapter includes the following sections:
chapter includes the following sections:
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Note
To start configuring NAT, see
Why Use NAT?
Each computer and device within an IP network is assigned a unique IP address that identifies the host.
Because of a shortage of public IPv4 addresses, most of these IP addresses are private, not routable
anywhere outside of the private company network. RFC 1918 defines the private IP addresses you can
use internally that should not be advertised:
Because of a shortage of public IPv4 addresses, most of these IP addresses are private, not routable
anywhere outside of the private company network. RFC 1918 defines the private IP addresses you can
use internally that should not be advertised:
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10.0.0.0 through 10.255.255.255
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172.16.0.0 through 172.31.255.255
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192.168.0.0 through 192.168.255.255