Scott O'Brien

Ramblings and resources of my online life

Logging NAT Translations on the Cisco ASA

2014-05-08 06:14:09 +0000 +0000

It’s often handy when dealing with infringement notices and the like to have NAT translations logged.  Sure a better way would be to record netflow from these devices (and include the translations) but for a quick syslog solution, you can always:

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logging enable
logging list ToSyslog level critical
logging list ToSyslog message 305011

See http://www.cisco.com/c/en/us/td/docs/security/pix/pix63/system/message/63syslog/pixemsgs.html#wp1054604

Messages will look something like:

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May 08 13:01:20 freewifi-asa.net.uow.edu.au %ASA-6-305011: Built dynamic TCP translation from inside:10.64.37.96/53008 to outside:192.131.251.2/49520