Tag Archives: video

Wireless UI Walkthroughs

Recently I created two wireless vendor UI walkthroughs and thought they would be worth sharing with the NCI crowd.

The first walkthrough is of the Meraki Systems Manager. This feature is built-in to the Meraki Enterprise Cloud Controller and offers a fairly extensive set of MDM features to Meraki customers at no extra cost.


The second walkthrough is of the Aruba Instant Virtual Controller UI. The Instant architecture does away with hardware controllers, feature licensing, and even simplifies the administrative experience.


I hope you find the videos interesting. As always, if you have any questions, or would like a live demonstration please do not hesitate to contact us.


Bonus Marks: Did you spot the hidden surprise in one of the videos?

WPS Brute Force follow-up information

On January 1st we posted a little bit of information regarding the Wi-Fi Protected Setup (WPS) brute force vulnerability. As a follow-up, I have performed a bit more research and analysis on the vulnerability and the attack tools. Here is a list of resources you might want to check out for more information: 

No Strings Attached Podcast 

I was privileged enough to participate in the @NSAShow’s episode 2 podcast: Wi-Fi Protected Setup, Battered or Broken? I highly recommend giving the podcast a listen as it contains a lot of good information. I’d also like to thank the host @revolutionwifi and the other guest @matthewsgast for a fun and insightful 45 minutes. 

Simply Wi-Fi 

We’ve already shared my video demonstration of how a WPS brute force attack works. Since then, I’ve created another video, seen below, demonstrating the use of a tool that identifies vulnerable wireless routers. I’ve also taken some frame captures of an attack and provided an explanation of the frames at different stages of the attack. Sample frames have also been made available for anyone who wants to take a closer look in Wireshark.


United States Computer Response Team (US-Cert) 

Here is the original vulnerability note created on December 27, 2011. It details the basic purpose of WPS and describes the vulnerability. 

Dan C.

If you are aware of any additional resources, please share them in the comments section below.

WPS Brute Force Concerns and Solution

Recently, a white paper was written by Stefan Viehböck which documented a few implentation weaknesses in the Wi-Fi Alliance’s Wi-Fi Protected Setup (WPS). Immediately following the release of the whitepaper, a new tool (called Reaver) was released publicly that could be used to brute force the WPS PIN, and therefore, gain access to the WPA/WPA2 pre-shard key (PSK). The attack takes 4-10 hours on average and has an extremely high success rate.

What does this mean for you?

If you are a home user with a relatively new wireless router, you are probably susceptible to this attack. Basically, if your wireless router is WPS-capable you should assume you are vulnerable.

How do you defend against this attack?

The solution is quite simple: disable WPS on your wireless router. This renders the attack useless and it becomes a non-issue for you.

Hey, wait a minute. How come you only mentioned home users?

WPS is a system designed specifically for non-technical people. It is widely implemented in SOHO wireless routers but is generally not an enterprise wireless feature. If you happen to be running SOHO gear in the enterprise, then you will need to see if you are vulnerable as well.

Just how easy is it to perform the attack?

Easy. Here is a quick video demonstration showing how the attack works, and how to protect against it. This video was created using freely, and readily available how-to documentation on the reaver code page.

The Bottom Line

If you are running enterprise gear, you probably have nothing to worry about. If you are running SOHO gear, then you need to look into this a bit further. Increasing the length and complexity of your PSK does not protect against this attack. You need to disable WPS until the protocol can be strengthened.

Oh yeah, and Happy New Year!

The NCI Blogging Robot

Questions? Concerns? Comments? Get it in touch with us below.


DHCP Fingerprinting with ArubaOS

If you’ve read any of my previous blog posts, you have probably noticed that I make an effort to confine my posts to vendor-neutral topics. However, every now and then I come across vendor-specific technology implementations that are so cool that I just have to say something about them. In this case, it is DHCP fingerprinting by Aruba Networks.

Without getting into too much technical detail, this technology watches the DHCP requests of wireless clients and identifies the operating system based on the way each device asks for an address. This feature is really cool because it means you can allow a user to connect to the same ESSID (read: wireless network), using the same username/password, with a variety of different devices, and get different levels of access depending on the specific device type. For example, if the user connects to the WLAN with a company issued laptop then they get access to the internal network. However, if they connect using an iPad they get Internet access only. Didn’t I say this was cool?

Enough typing, I recorded a little demonstration of DHCP fingerprinting for your viewing enjoyment:

As BYOD becomes more prevalent, I think we are going to start seeing technologies like this popping up all over the place. This is a good thing since it gives administrators the ability to allow BYODs onto the network without having to give up on security and control.

Dan C.

How do you deal with BYODs in your environment? If you have thoughts or comments regarding the proper way of dealing with BYODs please share them in the comments section. Also, as usual, please share this post with others if you found it useful or interesting.

Wireless Hacking with Fruit

A while back I delivered a short wireless security presentation, at a Toastmasters meeting, designed to explain a technical subject to a non-technical audience. The presentation went well enough that I’ve decided to record a modified version to place here.

This video is a very high-level explanation of how wireless networks operate. This is by design as I want to keep the information accessible to everyone and not just to those individuals who already have a deep technical understanding of wireless networking and information security.

Dan C.

Do you have additional tips for protecting yourself from this type of wireless attack? Leave your tip in the comments section and, as always, please be sure to share this post with anybody you think would benefit from viewing it.