Re: Problem setup atheros wifi card using WPA TKIP

On Tue, 2010-02-23 at 12:33 +0100, Sam Lefebvre wrote:

> rmmod ath_pci
> modprobe ath5k
> 
> Ok, i tried this and i get:
> 
> sam@Alix3d3:~$ sudo rmmod ath_pci
> sam@Alix3d3:~$ sudo modprobe ath5k
> sam@Alix3d3:~$ sudo wpa_supplicant -Dwext -iath4 -c/etc/wpa_supplicant.conf
> ioctl[SIOCGIFFLAGS]: No such device

The network device is probably called wlan0, not ath4.  Use iwconfig to
see which devices you have.

> sam@Alix3d3:~$ sudo wpa_supplicant -Dath5k -iath4 -c/etc/wpa_supplicant.conf
> Unsupported driver 'ath5k'.

The native interface for ath5k and most modern drivers is "nl80211", but
"wext" should work just fine.

> > sam@Alix3d3:~$ uname -a
> > 
> > Linux Alix3d3 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 16:20:31 UTC
> > 2009 i586 GNU/Linux
> 
> I think it's not the latest Ubuntu kernel, so you may want to upgrade,
> even if it's not related to wireless drivers.
> 
> I completely re-installed the embedded Alix3d3 pc in december 2009. 
> That means that this kernel is one of the latest kernels.
> What is the easiest way to update the kernel? (Linux is relatively new for me)

sudo apt-get update
sudo apt-get upgrade

> > sam@Alix3d3:~$ sudo wpa_supplicant -Dwext -iath4
> > -c/etc/wpa_supplicant.conf
> > 
> > Trying to associate with 00:30:bd:9a:04:da (SSID='belkin54g' freq=2462MHz)
> > 
> > Associated with 00:00:00:00:00:00
> 
> That's the first indication of trouble.  I suggest that you turn off 
> NetworkManager and kill any instances of wpa_supplicant that me be already 
> running. I believe that's the most likely reason why wpa_supplicant is 
> failing for you.
> 
> Indeed, I have also seen that the message 'Associated with
> 00:00:00:00:00:00' regulary returns. Somethimes the assiciation with
> 00:30:bd:9a:04:da was succeeded and I get the error that 4-way
> handshaking was failed. But the system tries this in an endless loop.
> Please tell me the steps that i can follow in order to turn off
> NetworkManager and kill any instances of wpa_supplicant that may be
> already running.

NetworkManager can be turned off with GUI.  Right-click on the network
icon and uncheck "Enable Networking".  wpa_supplicant can be killed by
killall:

killall wpa_supplicant

> > I get always the message 'WPA: 4-Way Handshake failed - pre-shared key
> > may be incorrect', and I’m sure that my password is correct typed in
> > the config file.
> 
> I think if wpa_supplicant gets the BSSID wrong, the encryption will fail.
> 
> What is the difference between BSSID and SSID? The SSID of my acces
> point is certainly sent-out, because I activate it in the Belkin
> config and I can see it on other (windows) pc's. See also the scan
> lower in this mail.

BSSID is usually the MAC address of the AP.  SSID (also knows as ESSID)
is a name on the network.  Many APs can have the same ESSID, but exch
has a unique BSSID.

> One thing that also may be the cause of the current problems is the
> version of madwifi driver. On the site http://madwifi-project.org/ I
> can read "In case you use kernel 2.6.25 or newer, you need to get this
> snapshot of the madwifi-0.9.4 branch instead of the v0.9.4 release!
> That snapshot is basically v0.9.4 plus compilation fixes for recent
> kernels." Because my kernel is newer than 2.6.25 (2.6.31) and and I
> used "madwifi-0.9.4-r4110-20100119.tar.gz" instead of this link which
> points to "madwifi-0.9.4-current.tar.gz", this can be an issue. Do you
> think it is recommended to re-install the driver before I try other
> things? What is the best way to do that smoothly?

I'm not aware of any recently fixed problems with WPA, so I think it
should be unrelated.

> Another guy said me that I have to check if my Belkin uses WPA1 or
> WPA2. When I check this, I can see that it is definitly WPA1. I have
> no idea how I can verify it in the config file.

It should not matter.  Everything should just work.

-- 
Regards,
Pavel Roskin

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