Author: Piotr Tarnawski

Welcome to my blog! My name is Piotr Tarnawski and I am an experienced System Engineer with a demonstrated history of working in the information technology industry. Skilled in Linux, Windows, Virtualization (VMware), DNS, and Active Directory. I work for Salesforce however content is my own and does not represent Salesforce as a company Contact: Twitter @AngrySysOps Facebook: https://www.facebook.com/AngrySysOps Youtube: https://www.youtube.com/c/AngryAdmin
Posted in VxRail

vCenter preparation for VxRail deployment

Create the structure for VxRail: Login to vCenter Create if it is not done by now, Datacenter for our VxRail cluster  Prepare cluster name for…

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Posted in vCenter

STS certificate expiration – “Signing certificate is not valid” error in VCSA 6.5.x,6.7.x or vCenter Server 7.0.x

Once admin is getting notifications form (ab)users about issue with login to vCenter, there are few possibilities: PEBCAK – one of many terms used in…

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Posted in ESXi

How to Change the IP Address of an ESXi Host – vmk0 management network – NO DOWNTIME

NOTE: Although host should have connectivity via second NIC, should something happen to that NIC one will lose host and VMs, so proceed with caution….

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Posted in Just4Fun

Cookbook!

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Posted in vCenter

How to manage certificates in GUI in vSphere 7

vCenter Server 7.0 has done some interesting things to help make certificate management easier. To start, the solution certificates are deprecated, being replaced under the…

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Posted in vCenter

How to restore vCenter Server from a File-Based Backup

PREREQUISITES: Download ISO file from Vmware website Make entry in DNS for your new vCenter Place ISO somewhere close to location of your new VC…

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Posted in vCenter

How to backup your vCenter – vSphere 7

Procedure: In a Web browser, go to the vCenter Server Management Interface, https://appliance-IP-address-or-FQDN:5480 Log in as root In the vCenter Server Management Interface, click Backup Click Configure Provide backup location Provide…

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Posted in vCenter

How to deploy vCenter 7.0

PREREQUISITES: Download ISO file from Vmware website Make entry in DNS for your new vCenter Please  ISO somewhere close to location of your new VC…

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Posted in PowerShell

PowerShell – Disable SLP on ESXi firewall – VMSA-2019-0022 (CVE-2019-5544), VMSA-2020-0023 (CVE-2020-3992) and VMSA-2021-0002 (CVE-2021-21974).

OpenSLP vulnerabilities have been disclosed that affect ESXi. The possibility of exploitation can be removed by performing the steps detailed in this article I will…

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Posted in vCenter

vSphere 7 – Certificate Management

With vSphere 7 the management of certificates became much easier. For starters the solution certificates are deprecated, being replaced under the hood with a less…

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