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From: Faraz Hasan <farazhasan110@xxxxxxxxxxx>
Date: Mon, 1 Dec 2008 16:54:44 +0000
I am sorry this is not a reply to your question but I am sure you can answer mine!
 
I am trying to capture wireless traffic 802.11 using wireshark. Is it only possible when I connect a certain wireless adaptor? I mean is it necessary to have AirPcap adaptor or just any other adaptor? Is it not possoble with just wireshark and WinPcap?
 
Faraz

> Date: Sun, 30 Nov 2008 15:39:20 +0200
> From: markryde@xxxxxxxxx
> To: wireshark-users@xxxxxxxxxxxxx
> Subject: [Wireshark-users] sniffing 802.11 wireless traffic (beacons)
>
> Hello,
>
> I have a question about sniffing 802.11 wireless traffic;
> I am running wireshark-1.0.0-2 on Fedora Core.
> I had set my wireless nic (ZD1211) to be in monitor mode;
> iwconfig wlan0 shows:
>
> wlan1 IEEE 802.11 Mode:Monitor Frequency:2.412 GHz Tx-Power=0 dBm
> Retry min limit:7 RTS thr:off Fragment thr=2352 B
> Encryption key:off
> Link Quality:0 Signal level:0 Noise level:0
> Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:0 Invalid misc:0 Missed beacon:0
>
> I had started sniffing with wireshark by selecting wlan1 in
> capture->options (and also selecting
> promiscuous mode).
> I can sniff only probe requests packets. Any idea why I cannot see beacons from
> an Access Point ? There is an Access Point near me to which I can
> associate from
> other machines near me (and also from my machine when changing to managed mode).
> It seems strange to me, because I scan for more than 5 minutes and
> no beacon fragments. (As far as I know, an access point sends usually 10
> beacons per second, or more )
>
> What could be the reason? I simply don't believe that an Access Point does
> not send beacons!
>
> Regards,
> Mark
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