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Cisco ASA Series Firewall ASDM Configuration Guide
Chapter6 Configuring NAT (ASA 8.2 and Earlier)
Using Dynamic NAT
Step2 For a new pool, from the Interface drop-down list, choose the interface where you want to use the
mapped IP addresses.
Step3 For a new pool, in the Pool ID field, enter a number between 1 and 2147483647. Do not enter a pool ID
that is already in use, or your configuration will be rejected.
Step4 In the IP Addresses to Add area, click Range, Port Address Translation (PAT), or PAT Address
Translation (PAT) Using IP Address of the interface.
If you specify a range of addresses, the ASA performs dynamic NAT. If you specify a subnet mask in
the Netmask field, the value specifies the subnet mask assigned to the mapped address when it is
assigned to a host. If you do not specify a mask, then the default mask for the address class is used.
Step5 Click Add to add the addresses to the Addresses Pool pane.
Step6 (Optional) You can add multiple addresses to the global pool. If you want to add a PAT address after you
configure a dynamic range, for example, then complete the value for PAT and click Add again. See the
“Multiple Addresses in the Same Global Pool” section on page6-20 for information about using
multiple addresses on the same pool ID for an interface.
Step7 Click OK.
Configuring Dynamic NAT, PAT, or Identity NAT
Figure 6-19 shows typical dynamic NAT, dynamic PAT, and identity NAT scenarios. Only real hosts can
initiate connections.
Figure6-19 Dynamic NAT Scenarios
10.1.1.1 209.165.201.1
Inside Outside
10.1.1.2 209.165.201.2
Security
Appliance 10.1.1.1:1025 209.165.201.1:2020
Inside Outside
10.1.1.1:1026 209.165.201.1:2021
10.1.1.2:1025 209.165.201.1:2022
Security
Appliance
Dynamic NAT
Identity NAT
Dynamic PAT
209.165.201.1 209.165.201.1
Inside Outside
209.165.201.2 209.165.201.2
Security
Appliance
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