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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter 34 Configuring Twice NAT (ASA 8.3 and Later)
Configuring Twice NAT
Step 5 Choose Dynamic PAT (Hide) from the Match Criteria: Translated Packet > Source NAT Type
drop-down list.
This setting only applies to the source address; the destination translation is always static.
Note To configure dynamic PAT using a PAT pool, choose Dynamic instead of Dynamic PAT (Hide),
see the “Configuring Dynamic NAT or Dynamic PAT Using a PAT Pool” section on page 34-4.
Step 6 Identify the translated packet addresses; namely, the packet addresses as they appear on the destination
interface network (the mapped source address and the real destination address). See the following figure
for an example of the original packet vs. the translated packet.