Dynamic Address Translation Scenarios - Cisco OL-4015-08 User Manual

More About NAT

Dynamic Address Translation Scenarios

Scenario 1
Translate from...
fields
Static/Dynamic ACL Rule
Dynamic 7
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The following scenarios show you how you can use dynamic address translation
rules. These scenarios are applicable whether you select from inside-to-outside,
or from outside-to-inside.
You want source–"Translate from"–addresses to use the IP address that is
assigned to the router's Fast Ethernet 0/1 interface 172.17.4.8. Port Address
Translation (PAT) would be used to distinguish traffic associated with different
hosts. The ACL rule you use to define the "Translate from" addresses is
configured as shown below:
access-list 7 deny host 10.10.10.1
access-list 7 permit 10.10.10.0 0.0.0.255
When used in a NAT rule this access rule would allow any host in the 10.10.10.0
network, except the one with the address 10.10.10.1 to receive address translation.
The following table shows how the fields in the Add Address Translation Rule
window would be used.
Translate to... fields
Type
Interface
Result
Traffic from all hosts on the 10.10.10.0 network would have the source IP address
translated to 172.17.4.8. PAT would be used to distinguish traffic associated with
different hosts.
Interface Address Pool
FastEthernet0/ Disabled
1
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