Date: Wed, 03 Sep 2008 11:23:49 -0700 From: Sam Leffler <sam@freebsd.org> To: Pietro Cerutti <gahr@freebsd.org> Cc: freebsd-hackers@freebsd.org, Matthias Apitz <matthias.apitz@oclc.org> Subject: Re: WPA && associating with unknown SSID Message-ID: <48BED635.5010100@freebsd.org> In-Reply-To: <48BEB687.5050308@FreeBSD.org> References: <20080903113131.GA8697@rebelion.Sisis.de> <48BEA791.6030406@freebsd.org> <48BEB687.5050308@FreeBSD.org>
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Pietro Cerutti wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > Sam Leffler wrote: > | Matthias Apitz wrote: > |> Hello, > |> > |> I'm using WPA to connect to my various Wifi AP's (office, home, > partner > |> locations) and have them well configured in the wpa_supplicant.conf(5) > |> file; > |> > |> from time to time at home I encounter that it is associating with an > |> unknown AP of my neighbourhood: > |> > |> > |> # ifconfig iwi0 > |> iwi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu > |> 1500 > |> ether 00:13:ce:a1:e6:81 > |> inet 192.168.2.3 netmask 0xffffff00 broadcast 192.168.2.255 > |> media: IEEE 802.11 Wireless Ethernet autoselect (DS/11Mbps) > |> status: associated > |> ssid o2DSL_kJaR channel 1 (2412 Mhz 11g) bssid > 00:19:cb:86:b3:84 > |> authmode OPEN privacy ON deftxkey 1 wepkey 1:40-bit bmiss 10 > |> scanvalid 60 bgscan bgscanintvl 300 bgscanidle 250 > roam:rssi11g 7 > |> roam:rate11g 5 protmode CTS roaming MANUAL > |> # ifconfig iwi0 list scan > |> SSID BSSID CHAN RATE S:N INT CAPS > |> o2DSL_kJaR 00:19:cb:86:b3:84 1 54M 19:0 100 EP > |> xxxxxxxxxxxx 00:14:6c:44:aa:f6 11 54M 13:0 100 EP WPA > |> > |> the network with SSID 'o2DSL_kJaR' is not im my > |> /etc/wpa_supplicant.conf; > |> > |> how this is possible and how can I prevent this? > |> > | You must have a wildcard entry in your wpa_supplicant.conf file (i.e. > | one w/o an ssid specified). > > Not necessarily. If you bring up a wlan interface and don't specify > anything, it will automatically associate with the first open AP it > finds. > > I don't know if it's to be considered a feature or a bug. I've been > worried by this sometimes, but honestly not enough to really care.. > > Anyway, it happens... > He was talking about wpa_supplicant selecting an arbitrary AP. If you have a device marked up then the system will handle ap selection+join but if wpa_supplicant is running then it marks the interface in "manual roaming mode" which stops that behaviour. Sam
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