Cisco ASA Series Cli Configuration Manual page 814

Licensing Requirements for Twice NAT
Twice NAT also lets you use service objects for static NAT-with-port-translation; network object NAT
only accepts inline definition.
For detailed information about the differences between twice NAT and network object NAT, see the
"How NAT is Implemented" section on page
Twice NAT rules are added to section 1 of the NAT rules table, or if specified, section 3. For more
information about NAT ordering, see the
Licensing Requirements for Twice NAT
Model License Requirement
All models Base License.
Prerequisites for Twice NAT
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For specific guidelines for objects and groups, see the configuration section for the NAT type you want
to configure. See also the
Guidelines and Limitations
This section includes the guidelines and limitations for this feature.
Context Mode Guidelines
Supported in single and multiple context mode.
Firewall Mode Guidelines
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Cisco ASA Series CLI Configuration Guide
1-2
For both the real and mapped addresses, configure network objects or network object groups (the
object network or object-group network command). Network object groups are particularly useful
for creating a mapped address pool with discontinuous IP address ranges or multiple hosts or
subnets. To create a network object or group, see the
section on page 1-2.
For static NAT-with-port-translation, configure TCP or UDP service objects (the object service
command). To create a service object, see the
section on page 1-5.
"Guidelines and Limitations"
Supported in routed and transparent firewall mode.
In transparent mode, you must specify the real and mapped interfaces; you cannot use any.
In transparent mode, you cannot configure interface PAT, because the transparent mode interfaces
do not have IP addresses. You also cannot use the management IP address as a mapped address.
In transparent mode, translating between IPv4 and IPv6 networks is not supported. Translating
between two IPv6 networks, or between two IPv4 networks is supported.
1-13.
"NAT Rule Order" section on page
"Configuring Network Objects and Groups"
"Configuring Service Objects and Service Groups"
section.
Chapter 1 Configuring Twice NAT
1-18.