January 06, 2021

Wireshark Display Filter Tip: Show Specific Frame Numbers

 

Try this Wireshark display filter
Wireshark’s features can really be a catch 22. In one way, they are very powerful but on another hand, many of them are difficult to find. Every so often I find a gem of a tip or trick which makes packet analysis a lot easier.

In this video I share a different kind of display filter that you may not be familiar with. I’m sure you have used MAC, IP address, TCP, UDP and maybe even some application layer display filters. I find that sometimes I need to display just a few packets that might not have MAC, IP, TCP or UDP port numbers in common.

As you will see in the video, one way to address this challenge is to simply Mark the packets and then apply a display filter for just marked packets. The other way is to use the following display filter syntax frame.number in {frame numbers} this will simply display any frame number you provide in the curly braces.

By focusing on a lesser‑known display filter, I demonstrate how to cut through noisy captures and quickly zero in on the traffic you actually need to inspect.

December 15, 2020

Wireshark Tutorial - Find TCP Delays (Chris Greer)

Wireshark Tutorial - Find TCP Delays (Chris Greer)
Chris Greer’s Wireshark Tutorial: Fixing Slow Applications is a sharp, practical walkthrough that shows you how to pinpoint performance bottlenecks within your  trace files. The video focuses on a clever filtering technique Greer uses to quickly isolate slow connections—an approach that saves time, cuts through noise, and helps you zero in on the real pain points. If you’ve ever stared at a huge capture file wondering where to begin, this tutorial gives you a clear, confident starting point.   

The Science of Pretty Much Anything (Paul W. Smith)

 

The Science of Pretty Much Anything (Paul W. Smith)
In the late sixties, I spent several summers working in a gas station. I learned how to rebuild brakes, mount and balance tires, and perform basic maintenance and repair tasks. I also pumped gas.

For those too young to remember, these were the days when you would pull into a gas station and someone would pump your gas, check your cars fluids, fill up your tires, and wash your windows. I was also taught to look for opportunities to sell tires, batteries, wiper blades and replacement fluids. Although it was essentially a sales job, it gave me an opportunity to learn some basic auto mechanics which probably saved me a lot of money with my own NCPO (non-certified pre-owned) cars.

December 14, 2020

NetAlly AirCheck G2 Review: Field Test for Wireless Site Surveys


aircheck - field test

I thought it would be helpful to cover 2 topics in the write up:

- Thoughts on the Aircheck G2/Air Mapper tool from Netally

- Share wireless site survey tips and tricks that you can use with any tool

NetAlly's Aircheck G2 is a very solid and capable tool that I enjoyed using but like all tools, there is always room for improvement and evolution. As I said in the video, I would give it an 8 out of 10 and quite happy with it.

December 07, 2020

The Complete Guide to Network Security Threats! (Chen Shem Tov)

 

The Complete Guide to Network Security Threats! (Chen Shem Tov)
What are Network Security Threats?


A network security threat attempts to perform unauthorized actions targeted against private, corporate, or governmental information technology (IT) assets. Typically, a network security attack is launched for the purpose of destroying, modifying, stealing data assets.

Network attacks are typically categorized into two main types:
Passive attacks—screen and monitor sensitive information, for the purpose of compromising enterprise security and any integrated customer.Active attacks—modify or completely destroy information found in the network.

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