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1-7
Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring Twice NAT
Configuring Twice NAT
•
Source Dynamic PAT (Hide)—Source Dynamic PAT does not support port translation.
•
Source Static NAT or Static NAT with port translation—A service object can contain both a source
and destination port; however, you should specify
either
the source
or
the destination port for both
service objects. You should only specify
both
the source and destination ports if your application
uses a fixed source port (such as some DNS servers); but fixed source ports are rare. For example,
if you want to translate the port for the source host, then configure the source service.
•
Source Identity NAT—A service object can contain both a source and destination port; however, you
should specify
either
the source
or
the destination port for both service objects. You should only
specify
both
the source and destination ports if your application uses a fixed source port (such as
some DNS servers); but fixed source ports are rare. For example, if you want to translate the port
for the source host, then configure the source service.
•
Destination Static NAT or Static NAT with port translation (the destination translation is always
static)—For non-static source NAT, you can only perform port translation on the destination. A
service object can contain both a source and destination port, but only the destination port is used
in this case. If you specify the source port, it will be ignored.
Detailed Steps
Configuring Dynamic NAT
This section describes how to configure twice NAT for dynamic NAT. For more information, see the
“Dynamic NAT” section on page 1-7
.
Command
Purpose
Step 1
object service
obj_name
service
{
tcp
|
udp
} [
source
operator
port
] [
destination
operator port
]
Example:
hostname(config)# object service
REAL_SRC_SVC
hostname(config-service-object)# service
tcp source eq 80
hostname(config)# object service
MAPPED_SRC_SVC
hostname(config-service-object)# service
tcp source eq 8080
Adds a service object.
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: ......