Monday, 31 of Julio of 2006

Detecting radio networks with our Palm

Certain models of Palm as the LifeDrive or the TX brings connectivity wifi integrated of factory, and others as the Tungsten E2 can have it by means of a special expansion board. Some Sony Clié as the mythical UX50 brought also it. So the park of apparatuses with wifi is quite extensive, and in addition it increases. Wifi the same allows us to connect to us to Internet in house without having to ignite our computer, that to consult all type of information there where we find hotspot or an open network (or closed, previous payment).

The abiertas networks, are those that do not use authentication (that is to say, do not request name of user, password, digital certificate…), and therefore they are accessible by anyone. And this search of open networks for a long time it has been becoming a popular liking. Wardriving consists of driving our car taking an equipment with connectivity wifi, and if possible a very directional antenna to increase the reach, and to be detecting by the route that we cross, all the radio networks that do not have their restricted access. We will find programs for detection of networks wifi whether used Windows, like MacOS or Linux. But of the popularisation of the movable devices with wifi, another modality has taken control popular: warwalking.

Constructed directional antenna with conserve tins
Constructed directional antenna with conserve tins

Warwalking is not more than the search of radio networks but, instead of leading, on foot. We only needed to take activated the connectivity wifi of our Palm, and she will look for networks while we walked. Some programs exist that will facilitate this task to us:

  • Netchaser: to netchaser will show to the near networks wifi to us with additional information enough: intensity of the signal, SSID of the joining point, time since one lost the signal, state of encryption WEP, and been of our battery. If we were interested in a joining point in particular, it will show specific information to us: direction MAC of the joining point, power of the signal, its SSID, the channel that are using, the date and hour in which it was detected for the last time, and the latitude and length of the signal more hard (I suppose that here the use will be needed a GPS receiver). Also it counts on the possibility of exporting the data, optionally in format CSV, that is soon importable from many programs, like for example Excel.

NetChaser provides very complete information
NetChaser provides very complete information

  • Wifi-where: besides helping to detect the near networks us wifi, if we simultaneously connected a GPS to our Palm we will be able to keep the exact location from hotspots. The data can be exported to the program Memo, to be able to analyze them in the PC later. And by all means, we will be able to maintain a favorite list of ours hotspots to be able to use them later.
  • JiWire hotspot to finder: If we do not want to have to look for hotspot, we can take advantage of the work done by others. This program has a data base of all the hotspots at world-wide level, so that we only must look for nearest and use it. We can look for by country, state, postal code, type of location (coffee, hotel, airport, etc.), or indicating a supplier of access to wireless Internet (WISP).
  • Finally, a small gratuitous application called APMApper exists, that allows us, if we have installed in our Palm the program TomTom Navigator 5, from a data file obtained previously with NetChaser or Wifi-where, to show hotspots detected like points of interest (POI) in the map of the TomTom. For the case of using NetChaser, we even can choose between concerning them all, or only those that do not use encryption (neither WEP nor WPA).

Seeing hotspots in the TomTom
Seeing hotspots in the TomTom

So as we see, a Palm also can be a good tool for the hunting and capture of radio networks, mainly by the small and slight advantage of being, and so we avoided the nuisance to have to load with a heavy laptop.


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