From owner-freebsd-hackers@FreeBSD.ORG Wed Sep 3 18:23:51 2008 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0B6D91065900 for ; Wed, 3 Sep 2008 18:23:51 +0000 (UTC) (envelope-from sam@freebsd.org) Received: from ebb.errno.com (ebb.errno.com [69.12.149.25]) by mx1.freebsd.org (Postfix) with ESMTP id B51268FC16 for ; Wed, 3 Sep 2008 18:23:50 +0000 (UTC) (envelope-from sam@freebsd.org) Received: from trouble.errno.com (trouble.errno.com [10.0.0.248]) (authenticated bits=0) by ebb.errno.com (8.13.6/8.12.6) with ESMTP id m83INnFx003249 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 3 Sep 2008 11:23:50 -0700 (PDT) (envelope-from sam@freebsd.org) Message-ID: <48BED635.5010100@freebsd.org> Date: Wed, 03 Sep 2008 11:23:49 -0700 From: Sam Leffler Organization: FreeBSD Project User-Agent: Thunderbird 2.0.0.9 (X11/20071125) MIME-Version: 1.0 To: Pietro Cerutti References: <20080903113131.GA8697@rebelion.Sisis.de> <48BEA791.6030406@freebsd.org> <48BEB687.5050308@FreeBSD.org> In-Reply-To: <48BEB687.5050308@FreeBSD.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-DCC-Rhyolite-Metrics: ebb.errno.com; whitelist Cc: freebsd-hackers@freebsd.org, Matthias Apitz Subject: Re: WPA && associating with unknown SSID X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Sep 2008 18:23:51 -0000 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 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