Technology Insights

Bluetooth CoD: Bluetooth Class of Device/Class of Service Explained

While testing some tools in Backtrack Linux I was working with some Bluetooth tools including btscanner, BlueProPro, bluediving, etc. and wanted to know more about the Bluetooth Class of Device/Class of Service also know as just Bluetooth CoD. Not only how it was formatted but also what exactly it meant and what it could tell me exactly about Bluetooth devices. In the end I feel I have a pretty good understanding of Bluetooth CoD and what it can tell you about various hardware devices even though it appears the standard for assigning CoD numbers is fairly loose most people appear to adhere to it somewhat. It should be noted that Bluetooth CoD is easily modified such as on Linux you can set it using hciconfig and thus could provide fasle information if you wanted to do so. Obviously not many people are going to understand this or know how to accomplish this so typically if you are scanning for Bluetooth devices you will be getting whatever the manufacturer has set when the item was manufactured. Below we describe more specifics about Bluetooth CoD including what the CoD hex means and some examples of Bluetooth CoD. Check out our Bluetooth Class list by clicking here.

Information Security

ipcalc – Backtrack 5 – Miscellaneous – Miscellaneous Network – ipcalc

A tool that is more than likely not used very often in Backtrack is the ipcalc which is a command line to that will quickly provide you broadcast address, network address, netmask, and Cisco wildcard mask. If you do a lot of Backtrack Linux installations that each require different IP information for various networks this tool can be really useful to verify settings made in the networks file in Ubuntu/Backtrack. I used to find myself breaking out a iPhone IP calculator on a regular basis and while I still do use that application I prefer ipcalc from the command line if its readily available. Below are details regarding ipcalc and the various switches available to it.

Technology Insights

Install Telnet Using Cygwin On Windows 7

You can install telnet on Windows 7 by following the directions in this article however you may want to instead install telnet using cygwin. The cygwin application provides you ¬†Linux type environment in Windows and you can use the cygwin installer to install lots of different Linux applications. One application that you might want to install is telnet however if you search for telnet via the cygwin installer there won’t be any results provided. Below is information on how to install telnet using cygwin on Windows.