Laptops failing to authenticate

[Hedghog]

Hi,

 

Ever since our CISCO wireless kit was installed we seem to be having a problem with laptops failing to authenticate seemingly at random. I'll try to explain the setup: -

CISCO APs (enterprise level Kit)

CISCO controlers and Radius server remotely located in LEA on adifferent domain working across a trust to us for LDAP queries.

Laptops configured to use PEAP authentication with computer information.

Laptops using 11g only with win XP

 

When I ask the network guys at county for the error messages it seems the LDAP query is timing out.

 

This continues until I plug the laptop into a wired connection and log onto the domain then it seems to find the laptop and everything works for a while then the same happens again.

I've just come back from some time away to find 8 of our science laptops in this state - just reconnecting them to the domain seems to remind the server that they are still around.

 

Any suggestions

[Hedghog]

update

 

This is the error message from the radius server.

Authentications

Most Recent Authentication

 

0 Authentications

 

Sessions

 

Active Sessions

Time:

May 28,2013 1:11:40.333 PM

 

RADIUS Status:

24485 Machine authentication against Active Directory has failed because of wrong password. : EAP session timed out

 

NAS Failure

[paulfinlay]

There's a bug in the XP that stops it from updating the machine password over wifi, it needs to be plugged into a wired connection. This was fixed in Win7.

 

KB article below

 

http://support.microsoft.com/kb/904943?wa=wsignin1.0

Edited June 1, 2013 by paulfinlay