Upgrade a VMware ESXi host that VCSA is running on

Sunday, 25 March 2018 / Published in Networking, Security
How do you upgrade a VMware ESXi host that VCSA is running on? well, you can not use VCSA VUM (vCenter Server Appliance, VMware Update Manager). In this case we have a chicken and the egg problem. This is due to maintenance mode required on the host prior to patching but maintenance mode requires VCSA

Using OpenSSL to generate CSR’s with Subject Alternative Name

Friday, 19 May 2017 / Published in Security
This post details how I’ve been using OpenSSL to generate CSR’s with Subject Alternative Name Extensions. You may have noticed that since Chrome 58, certificates that do not have Subject Alternative name extensions will show as invalid. Amazing, I must have missed the memo on that. Most of the certificates I use in my home

Wireshark Network Analysis (Second Edition)

Saturday, 29 August 2015 / Published in Networking, Security
Superbly written by Laura Chappell the Wireshark Network Analysis (Second Edition) is a must have book. Not only to learn the Wireshark tool in great depth but also protocol analysis in general. I’ve been eager to study for the WCNA (Wireshark Certified Network Analyst) for some time now so I made the purchase a few

The Art of Network Architecture

Sunday, 01 February 2015 / Published in Networking, Security
Written by Russ White and Denise Donohue.  This is one of the best Cisco Press books I’ve ever read.  To the point and very well written.  Buy it! More information here

Certified Ethical Hacker Cert Guide

Sunday, 01 February 2015 / Published in Networking, Security
Written by Michael Gregg this book is based on V8 of the exam.  This sits with pride on my book shelf and served me well to study for the exam.  Easy to understand explanations and exercises. Available from Amazon here