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BackTrack 5 Wireless Penetration Testing Beginner's Guide
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Follow these instructions to begin sniffing packets:
Power up our access point Wireless Lab
which we configured in Chapter 1, Wireless Lab Setup.
Start Wireshark by typing Wireshark&
in the console. Once Wireshark is running, click on the Capture | Interfaces sub-menu:
Select packet capture from the mon0
interface by clicking on the Start button to the right of the mon0
interface as shown
in the preceding screenshot. Wireshark will begin the capture and now you should see packets within the Wireshark window:
These are wireless packets which your Alfa Wireless card is sniffing off the air. In order to view any packet, select it in the top window and the entire packet will be displayed in the middle window:
Click on triangle in front of IEEE 802.11 wireless LAN management frame to expand and view additional information.
Look at the different header fields in the packet and correlate them with the WLAN frame types and sub-types you have learned earlier...
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