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1-10
Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring Network Object NAT
Configuring Network Object NAT
Examples
The following example configures dynamic PAT that hides the 192.168.2.0 network behind address
10.2.2.2:
hostname(config)#
object network my-inside-net
hostname(config-network-object)#
subnet 192.168.2.0 255.255.255.0
hostname(config-network-object)#
nat (inside,outside) dynamic 10.2.2.2
The following example configures dynamic PAT that hides the 192.168.2.0 network behind the outside
interface address:
hostname(config)#
object network my-inside-net
hostname(config-network-object)#
subnet 192.168.2.0 255.255.255.0
hostname(config-network-object)#
nat (inside,outside) dynamic interface
(continued)
–
Extended PAT—The
extended
keyword enables
extended PAT. Extended PAT uses 65535 ports per
service
, as opposed to per IP address, by including the
destination address and port in the translation
information. Normally, the destination port and address
are not considered when creating PAT translations, so
you are limited to 65535 ports per PAT address. For
example, with extended PAT, you can create a translation
of 10.1.1.1:1027 when going to 192.168.1.7:23 as well as
a translation of 10.1.1.1:1027 when going to
192.168.1.7:80.
–
Flat range—The
flat
keyword enables use of the entire
1024 to 65535 port range when allocating ports. When
choosing the mapped port number for a translation, the
ASA uses the real source port number if it is available.
However, without this option, if the real port is
not
available, by default the mapped ports are chosen from
the same range of ports as the real port number: 1 to 511,
512 to 1023, and 1024 to 65535. To avoid running out of
ports at the low ranges, configure this setting. To use the
entire range of 1 to 65535, also specify the
include-reserve
keyword.
•
Interface PAT fallback—(Optional) The
interface
keyword
enables interface PAT fallback when entered after a primary
PAT address. After the primary PAT address(es) are used up,
then the IP address of the mapped interface is used. If you
specify
ipv6
, then the IPv6 address of the interface is used.
For this option, you must configure a specific interface for the
mapped_ifc
. (You cannot specify
interface
in transparent
mode).
•
DNS—(Optional) The
dns
keyword translates DNS replies.
Be sure DNS inspection is enabled (it is enabled by default).
See the
“DNS and NAT” section on page 1-28
information.
Command
Purpose
Summary of Contents for 5505 - ASA Firewall Edition Bundle
Page 28: ...Glossary GL 24 Cisco ASA Series CLI Configuration Guide ...
Page 61: ...P A R T 1 Getting Started with the ASA ...
Page 62: ......
Page 219: ...P A R T 2 Configuring High Availability and Scalability ...
Page 220: ......
Page 403: ...P A R T 2 Configuring Interfaces ...
Page 404: ......
Page 499: ...P A R T 2 Configuring Basic Settings ...
Page 500: ......
Page 533: ...P A R T 2 Configuring Objects and Access Lists ...
Page 534: ......
Page 601: ...P A R T 2 Configuring IP Routing ...
Page 602: ......
Page 745: ...P A R T 2 Configuring Network Address Translation ...
Page 746: ......
Page 845: ...P A R T 2 Configuring AAA Servers and the Local Database ...
Page 846: ......
Page 981: ...P A R T 2 Configuring Access Control ...
Page 982: ......
Page 1061: ...P A R T 2 Configuring Service Policies Using the Modular Policy Framework ...
Page 1062: ......
Page 1093: ...P A R T 2 Configuring Application Inspection ...
Page 1094: ......
Page 1191: ...P A R T 2 Configuring Unified Communications ...
Page 1192: ......
Page 1333: ...P A R T 2 Configuring Connection Settings and QoS ...
Page 1334: ......
Page 1379: ...P A R T 2 Configuring Advanced Network Protection ...
Page 1380: ......
Page 1475: ...P A R T 2 Configuring Modules ...
Page 1476: ......
Page 1549: ...P A R T 2 Configuring VPN ...
Page 1550: ......
Page 1965: ...P A R T 2 Configuring Logging SNMP and Smart Call Home ...
Page 1966: ......
Page 2059: ...P A R T 2 System Administration ...
Page 2060: ......
Page 2098: ...1 8 Cisco ASA Series CLI Configuration Guide Chapter 1 Troubleshooting Viewing the Coredump ...
Page 2099: ...P A R T 2 Reference ...
Page 2100: ......