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learn wireshark

Zero-to-Hero on Wireshark Columns

When you first start using Wireshark you will find that the great folks at Wireshark provide us with a “Default” profile.  This is where we all started.  We will call this our Zero starting point.  Here is what it looks like: That default, whilst a great starting point leaves much to be desired as your

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Find and Display All Your Wi-Fi Passwords in Windows

If you have been to one of my Wireshark or Wi-Fi classes then you know I often criticize Microsoft Windows for some of its – well – inexplicable approaches to usage and security.  Here is yet another example.  Let’s say someone has a Rubber Ducky, or some Arduino device, that they want to plug into

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Troubleshooting The Internet Using Ping (a.k.a. ICMP)

In this article, I wanted to provide a guide to using ping – ICMP Echo – to troubleshoot your network.  Most people use ping on their platform to test if they can reach a given destination.  Just open up a terminal (Linux or MAC OSx) or command line (Windows: Start> Run> cmd) and enter the

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BGP Autonomous System (AS) Numbers

In a recent class I was asked for some details on BGP Autonomous System (AS or ASN) Numbers.  I thought I would document and provide a more complete answer here for others to learn from as well. What is the AS Number? Let’s begin with a definition.  An Autonomous System Number (AS number or simply

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