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Tag: warwalking

iTouch as network sniffer

In the iTouch warwalking post I was considering trying to gain access to closed networks for innocent purposes such as checking mail, rather than stealing secret passwords from people allowing you free access to their wireless network, but still, I should have thought of the following possibility

Here’s a walk-through :

  • type the following command into your iTouch (assuming you’ve installed the BSD subsystem) :

tcpdump -v -s 65535 -w log.txt

  • once you’ve collected enough packets, cancel the command (ctrl c), AFPd the file from the iTouch to your Mac and open it with Wireshark (this is the most convenient way to install binaries under Leopard as well as an updated version of X11. For other platforms, or source code, see here)

  • do whatever black magic you feel you have to perform using Wireshark (the new name for Ethereal) or other password crackers


iTouch warwalking

Four years ago I had a brief fling with wardriving. It went only as far as getting Ethereal to crack the security of our house-network. I simply couldn’t picture myself walking around the neighborhood with my laptop under my arm… However, jogging around with an iPod will attract far less attention.

Starting an iTouch in a network-rich environment you will be asked which network you want to connect to (see for example this wardriving video). However, if you need more information on the networks, there is a port of the OSX-tool iStumbler for the iPhone/iTouch : Stumbler (available also from the under Network). This morning I flipped open my iTouch in a generic street near the University and was surrounded by 12 wireless networks, 6 of them wide open…

One may then ask : what about less innocent wardriving tools such as Kismet or Ethereal itself? The problem with porting those seems to be that no-one knows whether the iTouch wireless driver can be put into ‘promiscuous mode’ (see for example this thread).

Once you have collected open networks at your favourite places or have passwords to closed networks, it would be nice if the iTouch would auto-detect these and connect to them without you having to remember the particular name or having to type in username/password combinations. Surprisingly, this is possible thanks to the people at Create a free login, then get Devicescape Connect (available under Network) run it and write down the pincode you are given and follow the instructions to complete the installation. You can then edit your Wi-Fi list of desired hotspot or personal networks, together with all login-data. There is a nice TidBit article describing devicescape in full detail.

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the iTunes hack

If you
are interested in getting thousands of mp3-files on your computer
using only 128 Kb of ROM, read on! Yesterday I made my hands dirty and
with Jan’s help upgraded two 6 Gb colored iMacs (a blue and a
pink one) to potential servers for our home-network having a 80 Gb resp.
a 120 Gb hard disk. If you do the installation yourself such an upgrade
costs you roughly 1 Euro/Gigabyte which seems to me like a good
investment. Clearly, you need to know how to do this and be less
hardware-phobic than I am. Fortunately, the first problem is easily
solved. There is plenty of good advice on the net : for the colored
iMacs we used the upgrade an iMac-page of MacWorld. For possible
later use, there is also a page for replacing the hard disk in an old iBook
(which seems already more challenging) and in a flat screen iMac (which seems to be impossible
without proper tools). Anyway, we followed the page and in no time
replaced the hard disks (along the way we made all possible mistakes
like not connecting the new hard disk and then being surprised that the
Disk Utility cannot find it or not putting back the RAM-chips and
panicking when the normal start-up chime was replaced by an aggressive
beep). An unexpected pleasant surprise was that the blue iMac, which I
thought to be dead, revived when we replaced the hard disk.

Back home, I dumped a good part of our CD-collection on the blue
iMac (1440 songs, good for 4.3 days of music and taking up 7.11 Gb of
the vast 120 Gb hard disk) to test the iTunes Central hack
explained by Alan Graham in his six
great tips for homemade dot mac servers
. Would I manage to get the
entire collection on my old iBook which had only (after installing all
this WarWalking-software) 800 Mb of free disk space? Here is what
I did :

1. On the iBook (or any machine you want to
play this trick on) go to your Home/Music/iTunes-folder and drag
the two files and one directory it contains to the Trash. Do the
same for the two files and which are in the

2. On the
iBook, use the Finder/Network-icon to connect to the server
(iMacServer in my case) and browse to the iTunes-folder where you placed
all the music (still, on the iBook in the Finder-window opened when you
connect to iMacServer). Make an Alias of the two files and the
directory in it (click on one of them once, go to the
File-submenu of the Finder and choose Make Alias) which
results in three new entries in the iTunes directory : iTunes 4 Music
Library alias
, iTunes 4 Music Library.xml alias and iTunes
4 Music Library alias
. Drag these 3 aliases to the
Home/Music/iTunes-folder on the iBook and rename them by removing
the alias-addendum.

3. In the Finder-window on
the iBook corresponding to the iMacServer browse to the
Home/Library/Preferences-folder and drag the two files and to
the Home/Library/Preferences-folder of the iBook. Launch
iTunes and it will give you access to the whole iTunes-collection
of iMacServer! In all, the three aliases and the 2 copied files take up
128 Kb…

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