Decrypt error ?

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Mar 17th, 2008
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I occasionally although rare get this security message..

"Decrypt error accurred for client '00:19:d2:28:42:b5' using 'Wpa' key on '802.11b/g' interface of AP '00:19:07:94:d5:00'. "

(mac`s are examples)

I use WPA2 Enterprise with a radius server and CSSC client on laptops.

and EAP-PEAP-TKIP as encription

would this message be somebody trying to gain access falsely ?

any ideas, it doesnt happen often but would seem that someone is trying to use a not supported authentication type ?



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Rob Huffman Mon, 03/17/2008 - 06:44
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Hi Megz,

This is cosmetic :)


MIB Name

CISCO-LWAPP-DOT11-CLIENT-MIB. CiscoLwappDot11ClientKeyDecryptError.

WCS Message

Decrypt error occurred at AP with MAC "{0}" running TKIP with wrong WPA/WPA2 by client with MAC "{1}."


The controller detects that a user is trying to connect with an invalid security policy for WPA/WPA2 types.

WCS Severity


Probable Causes

The user failed to authenticate and join the controller.

Recommended Actions


Hope this helps!


meggerman Mon, 03/17/2008 - 07:12
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Thanks Rob ! thats a relife then. so im guessing they have a laptop and its set to the wrong security for whatever reason.

great help (as usual) !

Megz ;)


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