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Cisco: 802 11 frames with Cisco VIP George Stefanick

Fluke Networks: Minimize Wi Fi Network Downtime

Aruba: Packets never lie: An in-depth overview of 802.11 frames

ATM15 Ten Talk “Wifi drivers and devices”

Houston Methodist Innovates with Wireless Technology

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  • CWSP Certified Wireless Security Professional Official Study Guide: Exam PW0-204
    CWSP Certified Wireless Security Professional Official Study Guide: Exam PW0-204
    by David D. Coleman, David A. Westcott, Bryan E. Harkins, Shawn M. Jackman

    Shawn Jackman (Jack) CWNE#54 is a personal friend and has been a mentor to me for many years.  I've had the pleasure and opportunity to work with Jack for 4 years. Jack is a great teacher who takes complex 802.11 standards and breaks them down so almost anyone can understand the concept at hand. I'm excited for you brother. Great job and job well done! Put another notch in the belt!

« 802.11 - Action Frames | Main | Wireless Sniffing in Windows 7 with Netmon 3.4 »

OmniPeek Remote Assistant (Cisco TAC)

Arron Leonard from Cisco TAC released a great post about ORA on CSC.

OmniPeek Remote Assistant

VERSION 4  Click to view document history

Omnipeek Remote Assistant (ORA)

Cisco TAC can provide the Omnipeek Remote Assistant application to assist in performing wireless packet captures. The tool will capture wireless packets and encrypt them for processing by the TAC. A full version of Omnipeek Enterprise is required to decrypt and analyze the capture files.



You should receive a ZIP file from TAC – such as “” (the filename may change with different release versions). Open this file and Navigate to the “OmniPeek Remote Assistant” folder – run the installer “ora131.exe” and follow the installation instructions.


Supported Wireless Adapters and Drivers

Capturing Wireless Packets with ORA requires the use of supported Wireless Network Adapters along with the appropriate driver version. To view a complete list of supported adapters and drivers, please see:


In most cases, the Ralink USB adapters will be the easiest to install - and, because you can install multiple USB adapters on a single laptop - they are the best way to get a multichannel capture.  The following Ralink adapters have been tested by Cisco TAC:


Linksys WUSB600N (V1 and V2), Linksys AE1000,ALFA AWUS051NH


Driver Installation for Linksys USB600N with Windows XP

1. TAC can provide the OmniPeek driver for the Ralink USB adapters.  You should receive a ZIP file “RALINKUSB-1_4_0_18.ZIP”. There will be 2 folders in the archive -- “Win2kXP” for 32-bit Windows and “WinXPx64” for 64-bit Windows. Extract the contents of the appropriate folder for your Operating System to a specified location.



2. Insert the Linksys USB600N adapter.

a. If this is the first time using the adapter on the workstation, Windows  will start the New Hardware Wizard. Do not search for a driver  automatically and click Next. Skip to step 3.

b. If you have previously installed the Linksys USB600N on your  workstation, you will need to change the driver to the Omnipeek version.  Go to Start > Control Panel > Network Connections and Right Click  on the Linksys adapter and click Properties. In this example, the  interface is “Wireless Network Connection 3”.


Under the General Tab, Click the “Configure…” button, and then click on the Driver Tab > Update Driver. This will prompt the Hardware Update Wizard.


3. Select “Install from a list or specific location (Advanced)” and click Next. Select “Search for the best driver in these locations.”, include the location of your extracted driver files and click Next:


4. Windows will now search and install the Omnipeek driver. If you receive the following warning message, click “Continue Anyway”.


5.  The driver installation should complete and the adapter is now ready for capturing packets with ORA.




Running Omnipeek Remote Assistant


If the correct driver isn’t loaded, ORA may appear to work, but not provide the option to select the desired channel to monitor. The Channel cell will read ‘Ethernet’ or ‘Wireless’ and not offer the option to select a channel:




Capture Settings

Select the desired adapter(s) to perform the capture and indicate the desired channel. If you have multiple supported adapters installed you can capture on multiple channels simultaneously (but you cannot mix wired and wireless interfaces at the same time). You can select either an 802.11b/g channel or 802.11a channel in the dropdown. You can select 40 MHz 802.11n channels using the (n40l) or (n40h) options. The n40l will be the selected channel and adjacent lower channel, while n40h will be the selected channel and adjacent higher channel.



File Properties

Select the folder you would like to store the capture files in. You can then also specify the file rollover size. Each new filename will include a timestamp so data will not be overwritten.


Capture Control

If you have selected correct adapter/channel settings, you will now be able to click the Start/Stop buttons at the bottom. You will not be able to see the packets, but you will see the counters incrementing. Click Stop when finished.


Uploading the files to TAC

If the capture file(s) are too large for email, you can upload them to your TAC Service Request:


Enter your SR Number, and then click on File Upload.

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