Cisco Systems Single Address for FTP, HTTP, and SMTP (Static NAT-with-Port-Translation)

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Cisco ASA Series Firewall CLI Configuration Guide
Chapter4 Configuring Network Object NAT
Configuration Examples for Network Object NAT
Single Address for FTP, HTTP, and SMTP (Static NAT-with-Port-Translation)
The following static NAT-with-port-translation example provides a single address for remote users to
access FTP, HTTP, and SMTP. These servers are actually different devices on the real network, but for
each server, you can specify static NAT-with-port-translation rules that use the same mapped IP address,
but different ports. (See Figure4-4.)
Figure4-4 Static NAT-with-Port-Translation
Step1 Create a network object for the FTP server address:
ciscoasa(config)# object network FTP_SERVER
Step2 Define the FTP server address, and configure static NAT with identity port translation for the FTP server:
ciscoasa(config-network-object)# host 10.1.2.27
ciscoasa(config-network-object)# nat (inside,outside) static 209.165.201.3 service tcp ftp
ftp
Step3 Create a network object for the HTTP server address:
ciscoasa(config)# object network HTTP_SERVER
Step4 Define the HTTP server address, and configure static NAT with identity port translation for the HTTP
server:
ciscoasa(config-network-object)# host 10.1.2.28
ciscoasa(config-network-object)# nat (inside,outside) static 209.165.201.3 service tcp
http http
Host
Outside
Inside
Undo Translation
10.1.2.27209.165.201.3:21
Undo Translation
10.1.2.28209.165.201.3:80
Undo Translation
10.1.2.29209.165.201.3:25
FTP server
10.1.2.27
HTTP server
10.1.2.28
SMTP server
10.1.2.29
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