RE: blind demodulation - sound card - lucent winmodem - new topics

["Jay Stapleton" <jstapleton () o2tech ca>]

With a cable "modem", which is actually a TNC, it's just a matter of
putting the device into promiscuous mode, much as you would in a LAN
setting.  I've heard that many cable companies have equipment to test
for this, and at least here, it's expressly forbidden in the EULA
(Because I'm sure we all obey those completely;)

And yes, to record the data stream from a line, you'd have to have
access to the house (or apartment phone panel), or the telco equipment
at some point.
Or at least, you'd have to have a device planted here.  I imagine a
subnotebook with a wireless Ethernet card hidden in someone's
basement... 
Ponderable, shurley (;


-----Original Message-----
From: CJ Oster [mailto:cjo () dothe12 com] 
Sent: Thursday, July 04, 2002 10:51 PM
To: Jay Stapleton
Subject: Re: blind demodulation - sound card - lucent winmodem - new
topics

This idea is great, but you have to have access to the phone line to
make it
worth while, which means sitting at the telco distribution box on the
corner
of the person/place you want to sniff.  While we're on the subject, does
anybody know if a similar thing can be pulled off with a cable modem?
They
say cable modems are "shared media" which is why you never get the
advertised speeds, but by "shared media", do they mean that every other
user's signals are available on your cable line also?  Just a thought.

-CJO-

----- Original Message -----
From: "Jay Stapleton" <jstapleton () o2tech ca>
To: "Deus, Attonbitus" <Thor () HammerofGod com>; "Evrim ULU"
<evrim () envy com tr>; "pen-test" <pen-test () securityfocus com>
Sent: Wednesday, July 03, 2002 6:11 PM
Subject: RE: blind demodulation - sound card - lucent winmodem - new
topics


> Slightly simpler, you can pick up a telephone recording box
> I had a cheap one that hooked into the handset, but I believe the
deluxe
> model goes right into the wall jack
http://www.radioshack.ca/estore/SearchResults.aspx?language=en-CA&keywor
>
ds=telephone+recording+control&pagenum=0&category=Telephone+Equipment+Ac
> cessories&catalog=RadioShack
>
> The hardware shouldn't be difficult at all, I'd like to see how the
> software works
>
> I was once told that you could record a 14.4k data stream, and play it
> back into a modem to demodulate both sides, but I can't imagine how it
> would be done.


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