Um yes, it's 'encrypted' using the shared secret between the  NAS and the RADIUS server... this is described in RFC 2865.

On 2 Aug 2011, at 07:31, gary wrote:

Hi All
I configure the NAS client as pap method for user authentication.
But through the packet analysis by wireshark it appears "Encrypted".
Is it normal or any incorrect configure on NAS or Freeradius server?
 
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Best Regards
Gary
 
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Arran Cudbard-Bell

RADIUS - Half the complexity of Diameter