Author Archives: Paul Stewart, CCIE 26009 (Security)

About Paul Stewart, CCIE 26009 (Security)

Paul is a Network and Security Engineer, Trainer and Blogger who enjoys understanding how things really work. With over 15 years of experience in the technology industry, Paul has helped many organizations build, maintain and secure their networks and systems.

Validating SGT Inline with Netflow and Embedded Packet Capture

In the last article, Learning TrustSec, An Introduction to Inline Tagging, we took a quick look at manual configuration of SGT Inline Tagging in a manual configuration. We also performed some validation with show commands and proved the operation by enabling … Continue reading

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Learning TrustSec – An Introduction to Inline Tagging

In my last article, Basic TrustSec – Implementing Manual SGTs and SGACLs, we talked about a basic TrustSec configuration. In that example, we shared the understanding of having two devices connected to a single switch and enforcing traffic policies via … Continue reading

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Basic Trustsec – Implementing Manual SGTs and SGACLs

Trustsec is a mature and interesting policy mechanism available in most Cisco gear. The features and capabilities vary depending on device type and class. One of the frustrations I have is that almost every Trustsec reference I find focuses on … Continue reading

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How Does Your Organization Value Technology?

Just a quick thought here today. Thinking about the organization you work for or the organizations you work with, how would you say they view technology? Key to Success – Technology is an enabler AND a primary differentiator Important – … Continue reading

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Viewing Cisco Proximity with SpectrumView

I wanted to share a quick trick for troubleshooting Cisco Proximity. For those that haven’t stumbled onto this particular technology, Proximity is a feature in Spark Connected and Traditional Cisco Video Endpoints that provides a pairing channel for screen sharing. … Continue reading

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Firepower FMC API – Initial Observations

As many of you know, I am not a developer but I do occasionally hack stuff together. This article is just some of the initial things I have learned working with the Firepower Management Console API. A good place to … Continue reading

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What’s Your Biggest Professional Challenge?

Now that we are in a new year (wow, it is hard to believe it is 2018), I want to ask a simple question. With what you are trying to accomplish at work or in your career, what is your … Continue reading

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Reading EEPROM – Obtaining the GE Concord Express Installer Code

One of the more frustrating things for me is when someone, or some company, attempts to control me. Typically having the desire for less responsibility, I have no desire to control individuals in this way. Recently, I started looking into … Continue reading

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Displaying Pi Output on an LCD

A few weeks ago, I shared an article about leveraging the Meraki API and a Raspberry Pi to create a Dummy Light for My Network. Today’s article expands on this slightly by adding a 16×2 LCD Display for additional output flexibility. For … Continue reading

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A Dummy Light for My Network

I’ve always heard the red lights in car dashboard referred to as Dummy Lights. One example might be the use of a light to indicate high temperature in lieu of a temperature gauge. Over the past few weeks, I’ve spent … Continue reading

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Back In The Future

There are several good nuggets that can be found in this Ted Talk. I particularly like the impetus on local communities and the idea of a Business Plan contest for high school students. Innovation: Five Steps to Get Your Local … Continue reading

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I Don’t Need a Car

You know, having conversations with teenagers can be a little annoying sometimes. One of mine (and I’ve heard others) keeps responding to my answers with “Why”. While this gets my blood circulating a little too fast in some contexts, getting … Continue reading

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