Protected WLAN

JD jd1008 at
Mon May 23 21:26:49 UTC 2011

On 05/23/11 12:22, Tim Smith wrote:
> On Monday 23 May 2011 17:50:50 JD wrote:
>> On 05/23/11 09:28, Tim Smith wrote:
>>> On Monday 23 May 2011 16:36:00 Tim wrote:
>>> Not really. This is SSID, not BSSID (BSSID is usually the MAC of the AP).
>>> When you scan, you not only listen for beacons, but you (should) send
>>> probe requests. If you put an SSID into your probe request, you will get
>>> a response only from a BSS with a matching SSID, so you broadcast saying
>>> "network named 'MyHouseNetwork' please respond" at which point you get
>>> the response from the real BSS which has the real SSID in it and not the
>>> bogus one that went in the beacons.
>> Well, I have placed wpa_supplicant in full debug verbosity
>> output mode, and it's probe/scan does not seem to be aimed
>> at just my router. In fact it gets usually 3 to 5 responses
>> from which it then selects my AP.
>> The wpa_supplicant.conf has the SSID and the BSSID in the
>> configuration. So, how come the probe/scan gets more than
>> one response?
> Well, note I said "If" :-)
> If you do not place ANY SSID into the probe request, then all networks will
> respond. Depending on the configuration of a multi-SSID AP you may see more
> than one probe response from the same MAC address in this case. Or not. That
> may be up to the guy who runs the network(s) or it may be a hard-coded
> behaviour of the APs being used.
> See the scan_ssid parameter for wpa_supplicant for how to change
> wpa_supplicant's behaviour in this respect.
You did not show the part where I said that
my router's BSSID and the nets SSID are in
So, I am asking how come the wpa_supplicant
is not aiming it's probe directly at that BSSID
and SSID coded in the config file? It seems to
me that it should do that.

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