Virtual Geek

Tales from real IT system administrators world and non-production environment

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Azure automation account DSC for On-Premise Virtual Machine on boarding

In my earlier series on on-prem Powershell DSC server I shown how to configure DSC (Desired State configuration) server and its client on windows & linux. Enabling WinRm is one of the main prerequisite for all DSC operations. If I see DSC's future, Microsoft is more and more focusing on Azure DSC …

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Getting started with Powershell Desired State Configuration (DSC) on Linux

DSC is a (DevOps) management platform in PowerShell that enables you to manage your IT and development infrastructure with configuration as code. While writing Part 1: Configure PowerShell remoting between Windows and Linux my main motive was to configure push Desired State Configuration (DSC) on L…

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Configure PowerShell remoting between Windows and Linux

After opensource PowerShell core 6 for linux was available to download, I wrote an article on it - How to Install and Use Microsoft PowerShell on Linux. This is just an addition to same guide. Few of my linux servers were installed with PowerShell core and they were installed with few PS modul…

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Powershell Generate Self-signed certificate with Self-Signed Root CA Signer

While exploring options on creating self signed SSL certificate using PowerShell, I got to know one of the good New-SelfSignedCertificate parameter Signer. It can be used by developers for testing purpose or I can also use it to generate fake CA signed certificates for my lab experiments. All the …

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Enable Access to the VCSA Bash shell or Appliance Shell

Currently, the vCSA is bundled with below supported shells - BASH Shell & Appliance Shell. The appliance shell can be used to update the VCSA, using the software-packages command and has some other use cases. When you log in for first time by default it shows appliance shell, below is the method to …

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Powershell WinRM HTTPs CA signed certificate configuration

This guide is not specific to configuration but it also shows how I troubleshooted CA signed certificate issue while configuring WinRM listener. This is a third part of PowerShell remoting over HTTPS using self-signed SSL certificate, For security best practices instead of going with Self signed ce…

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Configure Powershell WinRM to use OpenSSL generated Self-Signed certificate

PowerShell remoting over HTTPS using self-signed SSL certificate

This is a step by step guide and will show you how to use HTTPS port  and self signed SSL certificate while using Powershell Remoting. On the PSRemoting regards I had already written one article in the past POWERSHELL PS REMOTING BETWEEN STANDALONE WORKGROUP COMPUTERS, When you use WinRM PSRemot…

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How to replace default vCenter VMCA certificate with Microsoft CA signed certificate

VMCA (VMware Certificate Authority) is a one of the components in PSC (Platform services controller) inbuilt into vCenter server 6.x. VMCA is Certificate Authority and works as same as Microsoft CA certificate. It can issue certificates to VMware components i.e. vCenter, ESXi servers. In my previous…

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How to import default vCenter server appliance VMCA root certificate and refresh CA certificate on ESXi

This is step by step guide on basic vmware certificate chain installation in the infrastructure, all the steps performed on development infra, Back from my previous project, I installed new VMware vCenter appliance 6.7 recently and few of my esxi server were already installed with self signed certif…

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Troubleshooting replacing a corrupted certificate on Esxi server

While deploying your own certificate on ESXi server you need to follow certain requirement to create it as shown here, if new generated certificate is not correct as per the standard and if they are replaced overwritten without proper backup, it can cause connection error on ESXi server and you wil…

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How to deploy vCenter server appliance on VMware Workstation

I keep experimenting in my vSphere lab environment, and this time wanted to Install fresh vCenter server appliance from scratch on VMware Workstation, with new version of VMware Workstation deploying OVF (open virtulization format) is very easy, although I already had written article previously D…

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vCenter server appliance 6.5 deployment Error The supplied system is not valid

I was setting up a new VMware vCenter server appliance for a new project. While in the middle of setup of vCenter post deployment configuration I was keep receiving below error as log.

Error: The supplied system name FQDN is not valid.
Resolution: If the supplied system name is a FQD…

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Replacing a default ESXi certificate with a CA-Signed certificate

Push SSL certificates to client computers using Group Policy

In my earlier article I shown how to Generate new self-signed certificates for ESXi using OpenSSL. Importing this certificate in local certificates store is good for single computer or 2-3 systems, but may be tedious task if you want to maintain it on more than 10 systems, think what happens if the…

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Generate new self-signed certificates for ESXi using OpenSSL

Powershell Active Directory 2: Check, enable and disable child OU protect object from accidental deletion

This script is second part of  article Powershell Active Directory 1: Check, enable and disable child OU protect object from accidental deletion, In this script I have added enable and disable option, Usage are the same as first script. here is my complete OU hierarchy, There are two newly added …

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Powershell Active Directory 1: Check, enable and disable child OU protect object from accidental deletion

This script can be used to check the OU (Organization Unit) protect object from accidental deletion status. it provides other OU related information for reporting and inventory purpose. Inventory is generated using ActiveDirectory powershell module.

Active Directory Users and Computers, dsa.msc, Ou, Orgnization Unit, Project Object from accidental deletion, Ou object Managed By tab, Ou report, inventory, hierarchy report, Active directory module powershell.png

This report includes parent OU and all it…

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PowerShell Active Directory: Sync group membership from one user to another user and move to OU

Again I received some good feedback from community, This article is just a next update to my existing script PowerShell: Copy group membership from one user to another user in Active Directory, whose purpose is adding groups on member of tab on destination users and not removing anything. Which was…

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PowerShell GUI: Copy group membership from one user to another user in Active Directory

This is a GUI part of my earlier written script PowerShell: Copy group membership from one user to another user in Active Directory. I converted same script to GUI written in WPF language for simplifying task. It requires Source User and Destination users list is loaded from text file. (Text file c…

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