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Posted by:Carnildo
Subject:Kismet not spotting clients
Date:10:49:11 15/05/2013

> > I'm running Kismet 2013-03-R0 on a Raspberry Pi, and it doesn't seem to be very successful at detecting wireless clients.
> >
> > As a test, I booted up my laptop, had it connect to my wireless AP, and ran a flood ping (a minimum of 100 packets per second) for 15 minutes (transmitting a quarter-million packets in the process). My laptop didn't show up as a client. I tried the same thing with an open AP that a neighbor runs, with the same result.
> >
> > Clients do show up occasionally for wireless APs, but not very often. Any idea what's going on?
> What distro and what card? I'd had very spotty performance from the the Pi with supposedly supported wifi cards. Especially that stupid Edimax miniusb dongle that everyone says is supported but which is crap in my opinion. What you need to do is try using an Alfa with powered usb hub. Which brings me to my next point..
> The Pi has serious problems with power supply. If you are just plugging a wifi dongle directly into the Pi, you are gonna have a bad time. It could be dropping in and out, which could explain why it isn't detecting clients. Make sure you are using a POWERED usb hub connected to the Pi.

I'm running Raspian using an SMC "EZ Connect g" (a ZD1211-based USB dongle). I've checked for power problems, and the SMC (unlike my other two USB adapters) works with the low voltage and current that the Pi can supply directly.

Based on a TCPDump output, it looks like the adapter isn't passing along TCP packets or certain other types of data: I'm seeing plenty of beacons, some other wireless-management packets (although there seems to be a shortage of probe responses), assorted ARP and UDP packets, and WEP-encrypted data, but a 30 MB unencrypted download didn't show up at all.

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