Cisco Systems Licensing Requirements for Twice NAT Prerequisites for Twice NAT

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Cisco ASA Series Firewall CLI Configuration Guide
Chapter5 Configuring Twice NAT
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 page3-13.
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 “NAT Rule Order” section on page3-18.
Licensing Requirements for Twice NAT
Prerequisites for Twice NAT
•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 general operations configuration guide.
•For static NAT-with-port-translation, configure TCP or UDP service objects (the object service
command). To create a service object, see the general operations configuration guide.
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” section.
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
•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.
IPv6 Guidelines
•Supports IPv6.
Model License Requirement
All models Base License.