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Virtual Geek

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

Blog posts July 2021

How to reset vCenter Server SSO administrator@vsphere.local password

Whenever I get a already configured VMware vSphere projects handover to optimization and modernization, Sometimes I received infrastructure vCenter server with forgotten passwords either root or administrator@vsphere.local. In my earlier blog I have already shows a procedure to Resetting root pass…

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vCenter Server Public Key Authentication configuration SSH error received disconnect Too many authentication failures

This article is a second part of vCenter Server SSH received disconnect Too many authentication failures. In ther earlier article I resolved error without touching or configuring the VCSA (vCenter Server Appliance Server) to skip public key authentication. In this article I will configure VCSA serv…

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VMware PowerCLI esxcli namespace command elements empty no output

This article is another part and related to this VMware PowerCLI Connect-VIServer Object reference not set to an instance of an object. The resolution used in the earlier blog is applied here in this article.

The problem description is, I connected to my vCenter server after I tried to connect…

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VMware PowerCLI Connect-VIServer Object reference not set to an instance of an object

While connecting to ESXi server with VMware PowerCLI from one of my server I was keep receiving below error. I wasn't able to connect to ESXi server directly from PowerCLI module. 

@SERVER01 ~ Connect-VIServer ironman.vcloud-lab.com
Connect-VIServer :  Object reference not set to an instanc…

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Automate Many-to-One client certificate mappings for IIS hardening using PowerShell

Recently while talking to one of my colleage from another department, he wanted help on PowerShell scripts to automate few IIS Webserver (Internet Information Services) advanced configuration where he was struggling setting few IIS settings of manyToOneMappings for hardning purpose, other setting…

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Configure a Azure VM with Desired State Configuration in Automation Account

While working on one of the Azure Automation Accounts project I had to test and provide a demo of Desired State Configuration (DSC) on the Azure Virtual Machine, how it can be useful. There was a client requirment to not to use Group Policy for hardening, but the configuration must be done through D…

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Writing and Using Terraform modules

This is a small example of Terraform module how to write and use it. A Terraform module is a folder/container for multiple resources that are used together. Every Terraform configuration has at least one module, known as its root module, which consists of the resources defined in the terraform .tf f…

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vCenter Server SSH received disconnect Too many authentication failures

While connecting to vCenter Server Appliance with ssh command I was facing error Too many authentication failures disconnect. I checked ssh settings on the VCSA photon os from VM console but didnt find any issue. 

Related Article: 
Resetting root password in VMware vCenter Server Appliance
v…

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Resetting root password in VMware vCenter Server Appliance

Recently I came accross vCenter server in my infrastructure where root password was not working. So I thought of resetting forgotten root password. Before starting reset process make sure to take the snapshot of  vcsa (VMware vCenter server appliance) virtual machine. This way it be can ensured ther…

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