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Kali Linux the new version of popular advanced penetration testing and security auditing Linux distribution Backtrack is now available as an ready to flash official image for Raspberry Pi. The convergence of portable mini computing power of Raspberry Pi and 300+ open-source penetration testing tools provided by Kali Linux makes them a killer combination. We have already seen how raspi-config utility proves to be a must have tool for essential tweaks to Raspberry Pi, sadly installing and using the same on Kali Linux requires some extra bit of efforts as shown ahead.

Imagine the confusion when your WiFi network is showing all available WiFi access points in the neighborhood except the one you want to connect to, adding more confusion - the same access-point is visible and connectable from other devices. Since, your WiFi access-point is visible from other devices and your WiFi client can see other access-point we can be sure that the two particular devices are working fine and are only having issues communicating to each other.

As per the standard design all Wi-Fi equipments must share spectrum bandwidth which are spaced around multiple channels bands with other networks in the same operational environment. Many neighbouring WiFi devices sharing or overlapping a channel can slow down the performance of all Wi-Fi networks on that channel, and therefore utilizing a WiFi scanner to analyze and fix proper channel usage is highly advisable for optimal wireless performance.

We will be using free WiFi scanner and analyzer inSSIDer (available on Windows, Mac and Android platforms) to tackle this need for us. inSSIDer Wi-Fi network discovery tool conveniently visualizes all wireless hotspot’s in your devices range complete with information of there MAC address, encryption, signal strength and channel allowing users to troubleshoot numerous WiFi related issues.

The way WiFi channels work, one can make use of the information analyzed and visualized using inSSIDer to fine tune wireless bandwidth usage for maximum throughput and minimum interference as described ahead.

As you can see the way wireless bandwidth channels work, There are 14 channels designated in the 2.4 GHz WiFi range spaced 5 MHz apart with adjacent channels overlapping and interfering with each other. As evident from the diagram shared below, using channels 1, 6, 11 is recommended for the minimum overlapping and interference avoidance. A user must also make sure to use the least congested channel availble for best results.

We have seen how cryptic Apple iTunes error codes can be, and here is a working solution to fix another one - the Apple iTunes Error Code 1015.