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Strange Airport 802.1X problem

by mrosa-watcher / September 15, 2009 12:54 AM PDT

Hello guys.
Recently I had my late 2007 white MacBook serviced in an authorized reseller, to change the top cover, since my keyboard was failing in some keys.

Before that, everything was fine. But ever since then, my Airport connection at the office is failing. If I connect to my guest (unsecured) SSID, everything is fine. At home, with WPA Personal, also OK. The problem is in my production WPA Enterprise with 802.1X.

When I connect to it, it asks me for the password and then authenticates successfully. But, instead of getting an IP address, it simply starts the auth process again, and again, and again, in an endless loop. Both at the Console and in my authentication server, I can see "Authentication Successful" messages filling up my log. Eventually, it authenticates and stays connected, getting an IP address, and if this happens, everything works like a charm. But this is very intermittent.

I've set up a little SWF movie showing it happening, in case I was not clear (I'm not a native English speaker). It's uploaded to my website at: http://www.pistachecomcasca.com/movies/Airport_problem.swf

Any hints will be appreciated.

Marcelo Rosa

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Remove user profiles
by tkessler / September 15, 2009 6:58 AM PDT

Try going to the "Network" --> "Advanced" --> "802.1X" section of the system preferences and removing the user profile for your connection. Then set it up again.

Are there any other authentication profiles in the list?

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Alredy done :)
by mrosa-watcher / September 15, 2009 7:27 AM PDT
In reply to: Remove user profiles

None. Just this one. And I did what you told me several time.

I upgraded to Snow Leopard and nothing changed, same simptom.

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log files?
by tkessler / September 16, 2009 5:37 PM PDT
In reply to: Alredy done :)

Does anything appear in the system logs (check them with the "Console.app" utility) when this problem happens?

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Sure :D
by mrosa-watcher / September 16, 2009 11:44 PM PDT
In reply to: log files?

Here it goes (I cleaned it up from some Evernote and Marcopolo messages):

17/09/09 10:35:20 kernel AirPort: Link Down on en1. Reason 8 (Disassociated because station leaving).
17/09/09 10:35:20 kernel CiscoVPN : attempting to attach to all available ethernet interfaces.
17/09/09 10:35:20 kernel CiscoVPN : checking if we are already attached to interface: en3
17/09/09 10:35:20 kernel CiscoVPN : checking if we are already attached to interface: en2
17/09/09 10:35:20 kernel CiscoVPN : checking if we are already attached to interface: en1
17/09/09 10:35:20 kernel CiscoVPN : checking if we are already attached to interface: en0
17/09/09 10:35:45 kernel en1: 802.11d country code set to 'BR'.
17/09/09 10:35:45 kernel en1: Supported channels 1 2 3 4 5 6 7 8 9 10 11 36 40 44 48 52 56 60 64 149 153 157 161 165
17/09/09 10:35:46 kernel AirPort: Link Up on en1
17/09/09 10:35:46 kernel CiscoVPN : attempting to attach to all available ethernet interfaces.
17/09/09 10:35:46 kernel CiscoVPN : checking if we are already attached to interface: en3
17/09/09 10:35:46 kernel CiscoVPN : checking if we are already attached to interface: en2
17/09/09 10:35:46 kernel CiscoVPN : checking if we are already attached to interface: en1
17/09/09 10:35:46 kernel CiscoVPN : checking if we are already attached to interface: en0
17/09/09 10:35:48 eapolclient[2144] PEAP: successfully authenticated
17/09/09 10:35:48 eapolclient[2144] PEAP: successfully authenticated
17/09/09 10:35:49 eapolclient[2144] PEAP: successfully authenticated
17/09/09 10:35:50 eapolclient[2144] PEAP: successfully authenticated
17/09/09 10:35:51 eapolclient[2144] PEAP: successfully authenticated
17/09/09 10:35:51 Apple80211 framework[174] Scan() error 16 (Resource busy)
17/09/09 10:35:51 Apple80211 framework[174] __performScan() EBUSY, sleep 1 sec, try again
17/09/09 10:35:52 eapolclient[2144] PEAP: successfully authenticated
17/09/09 10:35:52 Apple80211 framework[174] Scan() error 82 (Device power is off)
17/09/09 10:35:52 Apple80211 framework[174] __performScan() failed (82)
17/09/09 10:35:53 kernel AirPort: Link Down on en1. Reason 23 (802.1X authentication failed).

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Same Problem
by Dhalgren--2008 / September 25, 2009 1:21 PM PDT
In reply to: Sure :D

I'm having the exact same problem with a WPA Enterprise network. It uses the EAP-FAST authentication method, but does exactly the same kind of authentication---de-authentication flickering. It's as if the authentication won't stick. I've had my AirPort card replaced with no resolution. I have a feeling something changed in one of the recent 10.5.x System Updates, something not fixed by the 10.6 software. I've seen other posts about this problem, but no solution yet, other than the ubiquitous "reinstall the System Software" recommendation.

If I find a solution, I will post it.

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Try this...
by tkessler / September 26, 2009 3:34 AM PDT
In reply to: Sure :D

Instead of selecting the scanned network, use the "Join Other Network..." option and specify the network. Additionally, try removing these two files (airport cache and preference files) to see if that clears up the problem. The "NUMBER" in the cache file can be any number.

Macintosh HD/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
Macintosh HD/Library/Caches/com.apple.LaunchServices-NUMBER.csstore

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No good
by mrosa-watcher / October 6, 2009 10:41 PM PDT
In reply to: Try this...

Tried this, same behaviour...:(

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Say. Are you testing other locations?
by R. Proffitt Forum moderator / October 6, 2009 10:57 PM PDT
In reply to: Sure :D
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Locations
by mrosa-watcher / October 7, 2009 2:38 AM PDT

This problem really only happens in my corporate network. We have two locations, Rio de Janeiro and S

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This worked for me
by Proximaleous / October 13, 2009 12:18 PM PDT

Hi Marcelo. I was having the exact same problem with the PEAP repetitive authentication thing. I found this.

http://infinitesteps.blogspot.com/2009/09/os-x-bug-problems-connecting-to-wpa.html

Basically its a downgrade from the 10.5.8 firmware to the 10.5.7 firmware. There's a website on that page that tells you what you need to do. It will involve some stuff in the Mac terminal. Pretty self explanatory, and I just tried it today because I could not connect to my school's WPA enterprise network. I have Leopard; not sure if it'll work with Snow Leopard though.

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I'll try as soon as I can
by mrosa-watcher / October 14, 2009 2:06 AM PDT
In reply to: This worked for me

Thanks,

I'm traveling, so I'll try it later.

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