Re: detecting promiscuous 802.11x cards...

Jim Thompson <[email protected]>
Newsgroups gmane.network.wireless.seattle.general
Message-ID <[email protected]>
David Huseby wrote:
> Is it possible to detect 802.11x cards in promiscuous mode?  In theory
> the answer is "no" because the cards would just be "listening" to all
> packets on a channel.  But in reality, do any of the cards change
> behavior in a detectable way when in promiscuous mode?  I was just
> curious because I seem to recall that there is a way to detect 10/100
> ethernet nics in promiscuous mode on a LAN.

You send the NIC an intentionally malformed ARP request.  If it 
responds, the target IP address has the NIC in 'promiscuous' mode.

I don't see any reason off-hand this wouldn't work against 802.11 NICs.

jim
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