Wireless Security
Re: CTS / RTS DoS and RF Jamming Apr 25 2011 02:07PM
Richard Farina (sidhayn gmail com)
On 04/25/11 05:31, John Nash wrote:
> Hey Rick,
>
> Thanks for the details. My questions inline:
>
>
> On Sun, Apr 24, 2011 at 3:44 AM, Richard Farina<sidhayn (at) gmail (dot) com [email concealed]> wrote:
>> On 04/23/11 12:37, John Nash wrote:
>>> Thanks Rick!
>>>
>>> Just one quick question - I am unsure if my card is really
>>> transmitting at 1W. Apart from the iwconfig command is there any other
>>> way I can verify the card is transmitting at maximum power? or the is
>>> the iwconfig output a foolproof verification?
>> HA! Yeah you aren't. The card is 297mW, with a 5dBi antenna they sell it
>> with your EIRP (total directed output power) is about 1W....on channel 6, in
>> 802.11b mode. Don't get me wrong, it's one of the best cards on the market,
>> but don't believe that marketing crap.
>>
> I am curious to know how you verified this?
To be completely honest I didn't verify it. The FCC does extensive
testing in a multi-million dollar lab (don't let the pictures fool you),
then they give out all the info for free on their website and that is
good enough for me. Is there likely a power fluctuation between cards?
Of course there is. But believing that it is going to change from ~300mW
to 1000mW is a fantasy. Please note, the "500mW" alfa had a 2dBi
antenna included, the "1000mW" alfa had a 5dBi antenna included. Did you
know that every 3dB of antenna gain leads to a doubling of power, it
does, and if you follow back the inevitable calculations of removing the
antenna you see that the alfa is ~300mW. See, who needs the freaking FCC???

http://www.youtube.com/watch?v=2NDPT0Ph5rA

-ZC
>
>> To save the inevitable "YOU ARE WRONG!!1!" posts, please feel free to lookup
>> any transmitting device at the FCC page here for full details:
>>
>> https://fjallfoss.fcc.gov/oetcf/eas/reports/GenericSearch.cfm
>> http://www.fcc.gov/oet/ea/fccid/
>>
>> (HINT: that fccid on your device isn't just a cool sticker)
>>
> Thanks! will have a look at this.
>
> Bt
>> Enjoy :-)
>>
>> -Zero_Chaos
>>> I will have to ask my wife to load me our microwave for the demo :)
>>>
>>> JN
>>>
>>> On Sat, Apr 23, 2011 at 8:37 PM, Richard Farina<sidhayn (at) gmail (dot) com [email concealed]> wrote:
>>>> On 04/23/11 00:27, John Nash wrote:
>>>>> Hello Group,
>>>>>
>>>>> I wanted to demonstrate a DoS attack in my company and was wondering
>>>>> if it could be possible to do so with the Alfa Card.
>>>>>
>>>>> I basically want to show:
>>>>>
>>>>> 1. CTS/RTS based attack
>>>> CTS/RTS is pretty easy to be honest and the alfa is completely capable of
>>>> is. All you really need to do is sniff a CTS and/or RTS packet, mod as
>>>> you
>>>> see fit, and replay. I think some of Josh Wright's tools have it
>>>> included,
>>>> maybe file2air?
>>>>> 2. RF Jamming attack
>>>> I can save you a bit of time on this, your card isn't capable, at least
>>>> not
>>>> publicly. Honestly I'd steer clear from this as it is against federal
>>>> law
>>>> and you are talking about using an extremely high power card to do it.
>>>> RF
>>>> Jamming is RF Jamming, if you really want to demo this buy a 60$
>>>> microwave
>>>> from Best Buy and make popcorn.
>>>>
>>>> -Zero_Chaos
>>>>> I hardly found any documentation regarding these using the Alfa card
>>>>> and BT4r2. Can someone please guide me?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> JN
>>>>>
>>

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