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Showing 227 results for the search term "John McDermott".


Could a Hand-held EMP Device Threaten Cyber Security?

The ability to disable computers, cars, or other machinery from a distance without being easily detected has fascinated me for a long time. Years ago I worked for defense cub-contractor founded by engineers who had worked on the Airborne LASER Laboratory (ALL). They successfully used a LASER on board an airplane to shoot down drones. […]



Using SSH for IoT Authentication

In a previous post, I wrote about attackers using default passwords in FTP and Telnet to compromise devices (especially IoT ones such as cameras). The compromised devices were then used to attack other devices on the Internet. I suggested users change passwords on the devices where possible but acknowledged that some were not changeable. I […]



Using the Wifi Analyzer App to Examine Networks

One of my favorite tools on my Kindle and phone is Wifi Analyzer. It is a tool that shows information about Wi-Fi networks in range of the device. I am scheduled to teach Learning Tree’s Introduction to Networking soon, and this is a tool I demonstrate to participants. Of course, neither this post nor my […]



How to Practice Linux Skills for Free

Colleagues and friends often ask me how they can learn or practice Linux when they only have Windows at work and a single family Windows computer at home, for free. That’s a good question, and there are a couple of different answers. Before we get to the free methods, I want to acknowledge that there […]



Improve Your Facilitation by Using the PO Technique

One of my favorite tools to use when I am facilitating a meeting is PO, which is short for provocation operation. Edward de Bono coined the word PO for use in the lateral thinking process. The idea of PO is to help move thinking or a discussion onward by allowing out-of-the-box thinking. It is used to introduce an […]


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