Cisco ASA 5505 Configuration Manual page 504

NAT Types
Information About One-to-Many Static NAT
Typically, you configure static NAT with a one-to-one mapping. However, in some cases, you might want
to configure a single real address to several mapped addresses (one-to-many). When you configure
one-to-many static NAT, when the real host initiates traffic, it always uses the first mapped address.
However, for traffic initiated to the host, you can initiate traffic to any of the mapped addresses, and they
will be untranslated to the single real address.
Figure 26-4
both translated and remote hosts can initiate connections, but the subsequent mappings are unidirectional
to the real host.
Figure 26-4
10.1.2.27
10.1.2.27
10.1.2.27
Cisco ASA 5500 Series Configuration Guide using ASDM
26-6
shows a typical one-to-many static NAT scenario. The first translation is always active so
One-to-Many Static NAT
Security
Appliance
209.165.201.3
209.165.201.4
209.165.201.5
Inside Outside
Chapter 26 Information About NAT
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