Re: Connection problem with WPA2 Enterprise with Windows Vista (Home Premium)

Jeff Liebermann escribió:
On Wed, 06 May 2009 19:37:51 +0200, Àngel Català <ninguno@xxxxxxxx>
wrote:

Dear everybody:

I have deployed a Wi-Fi network with WPA2 protocol set, and authentication with RADIUS server (FreeRADIUS 1.1.3), both "users" file and Active Directory. Everything is working fine for all kind of clients: GNU/Linux, Mac OS X, Windows XP (Professional), etc. It also works fine for users listed in "users" file and users belonging Active Directory.

Everyone but users that try to get access to Wi-Fi network with a Windows Vista (Home Premium, if this detail is important) operating system. There is no way they can connect to the network.

I have been capturing traffic and recording logging information from RADIUS server. In both cases I have realized that for a working client there is a series of RADIUS "Access Request" and "Access Challenge" between NAS and RADIUS server, 7 pairs, before an "Access Acept" is issued. But when a Windows Vista (Home Premium) appears in scene, there is just 4 pairs and then.... nothing more.

I have not had the chance to try with a Windows Vista Business.

I had found this link while searching for an answer before writing this post: http://www.vistaheads.com/forums/microsoft-public-windows-vista-networking-sharing/270350-wpa2-enterprise-just-plain-broken-vista-home.html

Is it possible this issue be a Windows Vista (Home Premium) pitfall ?. Anybody has heard about it before ?. I am driving crazy with this problem.

If anybody needs additional information do not hesitate in asking me.

Thanks.

Nice description. Too bad the problem is related to your undisclosed
maker and model wireless access point or wireless router.

Just one question... do the Vista Victims get a successfully assigned
DHCP address from whatever unspecifed device is delivering the IP
addresses? If not, be advised the Vista has a new and improved method
of dealing with DHCP. I covered this in a previous posting at:
<http://groups.google.com/group/alt.internet.wireless/msg/cd8d480583867ee3>
Also see:
<http://support.microsoft.com/kb/928233>
Since the above is 18 months old, it's possible that Microsoft has
allocated a few spare CPU cycles to fixing these and other Vista
problems, instead of doing damage control with Windoze 7. I'm too
lazy to check.

Otherwise, if these Vista boxes are properly obtaining a correct DHCP
assigned IP address, then the culprit is probably elsewhere. Vista
can generate copious log files showing connection attempts and
failures. To enable tracing (logging), see:
<http://support.microsoft.com/kb/929854/>
With Vista, the log files are dumped into: C:\windowstracingwireless\

Try to figure out at which point the Vista wireless client is failing.
Don't be suprised if it fails in the middle of negotiating the
encryption key. If so, temporarily change your unspecified access
point from TKIP to AES encryption (or the other way around, and see if
it helps).


Hi again,

I have been analyzing traces from FreeRADIUS server, both a succesful handshake with a HP laptop with Intel 3945ABG chipset running Windows XP Professional and a failure handshake with a Sony laptop with Intel 3945ABG chipset running Windows Vista Home Premium. After comparing side by side both traces I have realized that both handshakes are quite similar until the end of 4th request/response pair.

At this point, Windows XP box goes on with 5th request, but Windows Vista box does not.

It does not seem that my undisclosed maker and model access point has anything to do with this, specially when my undisclosed maker and model access point seems to work fine with Windows XP, GNU/Linux and Mac OS X 10.5 boxes.

I don't talk anything about DHCP because at this point it makes no sense. Of course, every box that validates successfully gets a valid IP address from the DHCP server that runs in a Windows 2003 Server.

Kind regards to everybody.
.

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