Message-ID: <51C2BF1A.5010908@broadcom.com> (sfid-20130620_103707_860428_4B105EA0)
Date: Thu, 20 Jun 2013 10:36:42 +0200
From: "Arend van Spriel" <arend@broadcom.com>
MIME-Version: 1.0
To: "Chris Adams" <cma@cmadams.net>
cc: =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= <zajec5@gmail.com>,
	"Larry Finger" <Larry.Finger@lwfinger.net>,
	b43-dev@lists.infradead.org,
	linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: BCM4331 deauthenticates every five minutes
References: <20130619160911.GB4784@cmadams.net>
 <51C1DDEB.3090701@lwfinger.net> <20130619164227.GC4784@cmadams.net>
 <CACna6rzbTHnyqs5SzTuYL7r_SW3iCNh0qqbnvfsF7Wspyhp1WA@mail.gmail.com>
 <20130619175850.GD4784@cmadams.net> <51C21B7C.2030005@broadcom.com>
 <20130619211108.GG4784@cmadams.net> <51C2BE54.20509@broadcom.com>
In-Reply-To: <51C2BE54.20509@broadcom.com>
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Sender: linux-wireless-owner@vger.kernel.org

On 06/20/2013 10:33 AM, Arend van Spriel wrote:
> On 06/19/2013 11:11 PM, Chris Adams wrote:
>> Once upon a time, Arend van Spriel <arend@broadcom.com> said:
>>> Can you make a capture using a wireless sniffer (using your thinkpad
>>> maybe)?
>>
>> How would I go about doing that?  I've done lots of network debugging
>> with tcpdump and such, but not much wireless stuff.
>>
>
> I use wireshark these days. If you install that you can use the steps
> below and select the wireless interface in wireshark to capture. I use
> wlan0 as interface name, but it may be different for you.
>
> 1. disable network-manager so it won't interfere.
> 2. bring the interface down
> $ sudo ifconfig wlan0 down
> 3. change interface type to monitor
> $ sudo iw dev wlan0 set type monitor
> 4. bring up the interface
> $ sudo ifconfig wlan0 up
> 5. start wireshark and select wlan0
> $ gksudo wireshark
>
> It will complain that running wireshark as root is not secure. If you
> care about that, you should read [1].

Forgot a step. You need to select a channel. You can do that before 
starting a capture in wireshark: $ sudo iw dev wlan0 set channel 5

> Regards,
> Arend
>
> [1]
> http://wiki.wireshark.org/Security#Administrator.2Froot_account_not_required.21
>
>
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