Settings Wireless Region Linux – Channel 13 Backtrack 4

One of the most recent problems I stumbled upon while running Backtrack, or any other linux distro for that matter is setting the region on a wireless card.  The typical procedure is :

[raw]iwconfig wlan0 channel 13[/raw]

And commonly you will get

[raw]error for wireless regquest ”set frequency”
(8b04)
set failed on device wlan0 ; invalid arugment[/raw]

There is an easy fix for this that will allow you to change the region mode your wireless adapter is in.

[raw]iw reg set FR[/raw] [raw]iw reg set US[/raw]

More on IW here.

References:

Channel	Center Frequency	Frequency Spread
1	2412 MHz	2399.5 MHz – 2424.5 MHz
2	2417 MHz	2404.5 MHz – 2429.5 MHz
3	2422 MHz	2409.5 MHz – 2434.5 MHz
4	2427 MHz	2414.5 MHz – 2439.5 MHz
5	2432 MHz	2419.5 MHz – 2444.5 MHz
6	2437 MHz	2424.5 MHz – 2449.5 MHz
7	2442 MHz	2429.5 MHz – 2454.5 MHz
8	2447 MHz	2434.5 MHz – 2459.5 MHz
9	2452 MHz	2439.5 MHz – 2464.5 MHz
10	2457 MHz	2444.5 MHz – 2469.5 MHz
11	2462 MHz	2449.5 MHz – 2474.5 MHz
12	2467 MHz	2454.5 MHz – 2479.5 MHz
13	2472 MHz	2459.5 MHz – 2484.5 MHz