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[Router-acl-ipv4-basic-2000] quit
# Configure outbound dynamic PAT with Easy IP on interface GigabitEthernet 2/0/2. The IP address
of GigabitEthernet 2/0/2 is used as the public address for the source address translation of the
packets from internal to external.
[Router] interface gigabitethernet 2/0/2
[Router-GigabitEthernet2/0/2] nat outbound 2000
[Router-GigabitEthernet2/0/2] quit
# Configure the Endpoint-Independent Mapping mode for PAT. For packets with the same source
address and port number and permitted by ACL 2000, the source address and port number are
translated to the same public address and port number.
[Router] nat mapping-behavior endpoint-independent acl 2000
# Enable NAT hairpin on interface GigabitEthernet 2/0/1.
[Router] interface gigabitethernet 2/0/1
[Router-GigabitEthernet2/0/1] nat hairpin enable
[Router-GigabitEthernet2/0/1] quit
Verifying the configuration
# Verify that Host A, Host B, and Host C can access each other after they register their IP addresses
and port numbers to the external server. (Details not shown.)
# Display all NAT configuration and statistics.
[Router] display nat all
NAT outbound information:
Totally 1 NAT outbound rules.
Interface: GigabitEthernet2/0/2
ACL: 2000 Address group: --- Port-preserved: N
NO-PAT: N Reversible: N
Config status: Active
NAT logging:
Log enable : Disabled
Flow-begin : Disabled
Flow-end : Disabled
Flow-active : Disabled
Port-block-assign : Disabled
Port-block-withdraw : Disabled
Alarm : Disabled
NAT hairpinning:
Totally 1 interfaces enabled with NAT hairpinning.
Interface: GigabitEthernet2/0/1
Config status: Active
NAT mapping behavior:
Mapping mode : Endpoint-Independent
ACL : 2000
Config status: Active
NAT ALG:
DNS : Enabled
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