Liam Keegan – Medium

Liam Keegan

If you run VMware vCenter Server, please patch against log4j. Now.

Overview

6 min readDec 19, 2021

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If you run VMware vCenter Server, please patch against log4j. Now.

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Liam Keegan

Securing Cisco Duo Secret Keys is Really, Really Important. Really.

If you accidently expose secret two-factor auth keys, you open yourself up to compromise. Here’s how you can take steps to prevent that!

5 min readDec 16, 2020

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Securing Cisco Duo Secret Keys is Really, Really Important. Really.

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Liam Keegan

Tech Note: ACI EPG Static Port Bindings — Never pick “untagged”

When you’re statically binding an EPG to a port, you have the option to choose one of three options. Here’s why you never want to never…

2 min readAug 14, 2020

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Tech Note: ACI EPG Static Port Bindings — Never pick “untagged”

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Liam Keegan

Cisco ACI: APIC Certificate Bug (it’s a nasty time-waster)

My team ran into a nasty ACI bug (CSCva68310) where your spine and leaf nodes stay Inactive, no matter what you do.

3 min readJun 27, 2020

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Cisco ACI: APIC Certificate Bug (it’s a nasty time-waster)

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Liam Keegan

Cisco Container Platform + HyperFlex = Stupid Easy Kubernetes

Cisco Container Platform (CCP) makes it brain-dead easy to deploy Kubernetes on HyperFlex (and UCS) — fully supported and pre-integrated!

5 min readJun 18, 2020

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Cisco Container Platform + HyperFlex = Stupid Easy Kubernetes

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Liam Keegan

The good, bad and ugly truths about purchasing technology in a demo-oriented world.

Everyone has a slick demo, but that demo might not become your reality. A look at setting realistic expectations in an era of shiny things.

7 min readMay 18, 2020

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The good, bad and ugly truths about purchasing technology in a demo-oriented world.

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Liam Keegan

Do this one weird trick to make VPN better for your employees

By sending specific cloud services directly to the provider instead of through your VPN, you can improve performance for everyone.

5 min readApr 6, 2020

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Do this one weird trick to make VPN better for your employees

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Liam Keegan

Are online gamers breaking the Internet? No, but the patches are.

The Daily Mail released an article claiming gamers were breaking the Internet. Not quite — let’s look at the reality behind the claim.

4 min readMar 22, 2020

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Are online gamers breaking the Internet? No, but the patches are.

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Liam Keegan

Online Conferencing during COVID-19? Use VoIP instead of Call-In or Call Me

By using your computer audio instead of your cell phone, you can help reduce the burden on the phone network at this unprecedented time.

3 min readMar 20, 2020

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Online Conferencing during COVID-19? Use VoIP instead of Call-In or Call Me

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Liam Keegan

WebEx and Larger Group Meetings — How to be Successful

A how-to on using WebEx to hold larger group meetings without disruptions. Lots of WebEx pro tips!

6 min readMar 18, 2020

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WebEx and Larger Group Meetings — How to be Successful

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Liam Keegan

Liam Keegan

Data center/security/collab hack, CCIE #5026, focusing on automation, programmability, operational efficiency and getting rid of technical debt.

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