Can you post your config on the router? Also, this may be better to post over at cisco-nsp. B -----Original Message----- From: Michael Ruiz [mailto:mruiz@lstfinancial.com] Sent: Tuesday, January 18, 2011 1:15 PM To: nanog@nanog.org Subject: Authentication using Microsoft 2008 Active directory for Cisco RADIUS login Hello all, I am having some trouble getting my Cisco routers to use Active directory to authenticate users. I have searched on Google and so far I am coming up dry on good documentation that will work. I have used these links. http://briandesmond.com/blog/how-to-authenticate-against-active-director y-from-cisco-ios/ http://filedb.experts-exchange.com/incoming/2008/12_w51/87700/TA0001-Win dows-2008-RADIUS-for-C.pdf When I am doing a debug against the AAA I am getting the "Response (32) failed decrypt" error. Any thoughts? Thank you in advance. M.A.R