Strange SYSLOG message

Answered Question
Sep 2nd, 2010
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All,


My FWSM recorded the following event and I have no explanation as to how this is possible.


%FWSM-6-305010: Teardown dynamic translation from apps:172.31.129.222 to web:172.31.129.222 duration 3:00:00


If you read closely, the IP addresses are identical but the connection involved two different interfaces on the firewall.


Here is part of the output from "show ip"

Vlan1128                 web                    172.31.128.254  255.255.255.0   manual
Vlan1129                 apps                   172.31.129.254  255.255.255.0   manual

How would the firewall even build a connection like this.  The IP in question is clearly out the apps interface.  Even if that address also showed up out the web interface (which would be a server config error), no connection should be built or torn down by the firewall.



Has anyone seen this before?


Thanks,

Bruno


Correct Answer by Kureli Sankar about 6 years 7 months ago

Bruno,

172.31.129.222 host in apps looked like itself when it went to the web interface and it got torn down. It just means that the host got "identity" translated.


You can issue

sh xlate debug | i 172.31.129.222


that will show you the same thing.


-KS

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Correct Answer
Kureli Sankar Thu, 09/02/2010 - 12:14
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  • Cisco Employee,

Bruno,

172.31.129.222 host in apps looked like itself when it went to the web interface and it got torn down. It just means that the host got "identity" translated.


You can issue

sh xlate debug | i 172.31.129.222


that will show you the same thing.


-KS

BRUNO WOLLMANN Thu, 09/02/2010 - 12:26
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Thanks KS.


I misread the message.  I was reading "connection" when it said "translation".


My mistake.


Thanks again,

Bruno

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