MSCHAPv2 Authentication

Luca Merolla luca.merolla
Thu Mar 8 06:53:47 PST 2007

Hi everyone,

I have a BIG problem with wireless and linux. In my college there is a 
wireless network where you need username/password to access it but I'm 
not able to do this...
We have a Windows Guide that show how to configure it:
- first you have to have windows xp SP2 (otherwise will not work... 
it's seems that it's true)
- the first step to connect is to try to connect with the "Wireless 
Network Connection" tools from SP2 without changing any settings (so it 
will download the certificate and it will fail to login)
- after you have to change the settings in the access-point that you 
were trying to connect in that way:
- Network Authentication: WPA
- Data Encryption: TKIP
- EAP Type: Protected EAP (PEAP)
- Uncheck "Validate Server Certificate"
- Select Authentication Mode: Secured Password (EAP-MSCHAP v2)
- Uncheck "Automatically use my Windows logon name and password (and 
domain if any)
- after these changes you try to connect again and a form will appear 
where you have to enter (username, password, SSID)

I have an Atheros based wireless card, and works like a charm in any 
other wireless network that I have tryed.

The strangest thing of that, is that nobody is able to connect in 
Windows with the proprietary utility from every Wireless card, the only 
way to connect is to follow the procedure with the Wireless Network 
Connection Tool from Win XP SP2.
So, my question is:
is it possible to reproduce the step made by the Wireless Network 
Connection Tool (especcially the first one to download this kind of 
certificate) to connect with linux-wpa_supplicant, or should I give up?

Thanks in advance,
Luca Merolla

Luca Merolla <luca.merolla at>
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