Ethereal-users: RE: [Ethereal-users] Sniffing 801.11 packets

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From: "Ow Mun Heng" <ow.mun.heng@xxxxxxx>
Date: Wed, 31 Dec 2003 16:57:04 +0800

> -----Original Message-----
> From: Guy Harris [mailto:guy@xxxxxxxxxxxx]
> Sent: Wednesday, December 31, 2003 3:44 PM
> 
> On Wed, Dec 31, 2003 at 03:09:20PM +0800, Ow Mun Heng wrote:
> > RH9
> > Ethereal 0.9.15
> > Linux 2.4.23
> > 
> > 
> > Having some issues with sniffing 802.11 networks. Currently 
> I do not see 
> > any traffic other than my own. 
> 
> What 802.11 card are you using?

Netgear MA401-RA
hostap_cs drivers

Also tried with intel pro/wireless 2100 using ndiswrapper


> 
> > I'm not sure if it's because the AP is acting as a switch or a hub. 
> > Prior to this, like a month back, I was able to sniff traffic going 
> > through the AP.
> 
> Have you changed either the kernel or the 802.11 card?

Kernel has been changed.. was using 2.4.22-ac4 back then.. I believe it was 
using wireless.h version 15

Now changed to kernel 2.4.23 which I believe is using wireless.h version 16

iwconfig is compiled using wireless.h version 16


> 
> Are you capturing in promiscuous mode or monitor mode?
> 

Promiscuous mode. 
Tried using iptraf also no joy.
Funny thing, if I were to use ettercap to arpspoof 1 add to the gateway, I
will be able to get traffic from that machine. (but again, this is spoofing,
What I want is to determine traffic flow. ip traffic flow)


If you think it could be a kernel change issue, I will boot back into my old
kernel and see the effects.

Again, since this is 802.11 traffic, everything's in the air. I should be
able to 
sniff it right? The logic's right, right? Otherwise, why would I hear about
'secure your APs' and 'warchalking'...

Thanks
OW