EAP-TLS problems Windows XP

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Apr 21st, 2009
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We are using Cisco ACS 4.1 for Windows RADIUS server, Windows 2003 PKI, 3750 access switch and Windows XP SP 3 workstations.

Problem is that users with user certificate can loging successful by 802.1x. When user logs in without user certificate (but with computer certificate) no record will be written in ACS log. Windows tells that authentication is not ok. But client keeps ip address form successful computer authentication. After a few minutes, the connection will be dropped.

AuthMode is set to 2 in Windows. At first there will be computer auth, then user auth takes place. Why does the computer keeps the ip address from successful computer auth ? We want to put the computer in aut-fail VLAN. But that doesn't happen...

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jafrazie Tue, 04/21/2009 - 08:43
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Are you saying that a user WITHOUT a cert logs in, or a user with an invalid cert logs in?


Either way, if you're running AuthMode = 2, it won't even try to authenticate the user. If you want to authenticate the user, then do AuthMode = 1.


HTH,



Jagdeep Gambhir Tue, 04/21/2009 - 10:53
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Do you see same issue with SP2 ?


Here is important information about dot1x configured on XP SP3.


You cannot connect to an 802.1X wired network after you upgrade to Windows XP Service Pack 3


http://support.microsoft.com/kb/953650


Changes to the 802.1X-based wired network connection settings in Windows XP Service Pack 3


http://support.microsoft.com/kb/949984/



Regards,

~JG


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