To prevent attackers or insiders destroy your infrastructure backups, you must use something called an immutable backup repository. This rather stranger name means basically that even with admin credentials you cannot delete the backups from that backup repository during certain period of time. It’s hardened backup repository on Linux distro. If you’re a victim of […]
Free Recovery software for SD Cards, SSDs or HDDs called WinfrGUI
There is free software I want to highlight today. It’s called WinfrGUI and it is a Free recovery software for SD Cards, SSDs or HDDs. The software is able to recover files that are no longer in Recycle bin in Windows. When a file is permanently deleted from the Recycle Bin, it is invisible to […]
How to achieve Rightsizing of VMs
In this post, we’ll have a look at Rightsizing of VMs. When you have VMs with a lot of vCPUs or with not enough vCPUs configured, the performance is not optimal. Right-sizing is critical to get the best performance. Rightsizing is when you change the amount of resources allocated to a VM to match the […]
VMware ESXi 7.0 U3a update released
There is a new patch update ESXi 7.0 U3a that has been released by VMware. This patch fixes a PSOD issue that had been reported after the release of the original U3. The release notes can be found here. Update: As you may be aware, we have identified critical issues following the vSphere 7.0 U3 […]
Upgrade VMware ESXi to 7.0 U3 via command line
This is a quick VMware ESXi upgrade to ESXi 7.0 U3 via a command-line interface (CLI) that allows you to quickly download and upgrade your ESXi host in case you are NOT using a vCenter server AND your hosts are without internet access. Interesting fact as I was testing other methods, as usual, and one […]
VCP-DCV Explain shares, limits, and reservations (resource management) – Objective 5.1.1
When you do over-provisioning on ESXi host, on memory, and CPU, you basically need a tool that makes sure that the VMs get the correct amount of resources. Let’s say we have a VM that needs to get 3500MHZ (Reservation) and make sure that another VM for testing never gets more than 1000MHZ (Limit). The […]
VCP7-DCV – Objective 4.1 – Describe single sign-on (SSO) deployment topology
VMware vSphere 7 and higher only supports vCenter Server Appliance (VCSA) based architecture where a conversion utility is provided for Windows-based vCenter server and also for external Platform Service Controllers (PSC). Starting vCenter server 7 the deployment topology is fairly simpler than in previous releases as external PSCs are no longer supported. The services provided […]
VCP7-DCV Objective 1.6.1 – Describe Distributed Resource Scheduler (DRS)
VMware vSphere has a Distributed Resource Scheduler (DRS) allowing automatic VM placement and vMotion. The purpose of DRS is to make VMs “happy” so they run smoother. DRS can be set to automatically move VMs based on its algorithms, or be set to manual and give recommendations for manually moving VMs. This post is part […]
How to prevent Brute force attacks on Windows or Linux servers
When you have servers exposed to the internet with RDP or SSH, it won’t take long before they’ll be flooded with connection requests. The worst-case scenario is of course the complete flooded servers crawling under hundreds and hundreds of connections attempts launched at the same time, to gain access by using brute force dictionary attacks. […]
StarWind V2V Converter and P2V Migrator As a Hypervisor Switch
A Switch from one hypervisor to another needs special tools to convert virtual disks and layouts. There is a Free Tool from StarWind called V2V Converter / P2V Migrator. It’s kinda 2-in-1 tool which can do the conversion job, and it can also, if you need, convert some physical machine you might have left non-virtualized. […]
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