Archive for the ‘VMware vSphere 6.7’ Category

Python ransomware script targets ESXi server for encryption – because configuration errors rapidly escalated to a ransomware attack inside a virtual machine hypervisor

Mittwoch, Oktober 6th, 2021

  Securing the ESXi Hypervisor – by default the ESXi Shell and SSH services are not running and only the root user can log in to the Direct Console User Interface (DCUI) if you decide to enable ESXi or SSH access you can set timeouts to limit the risk of unauthorized access

VMware has also published a list of best practices for administrators of their ESXi hypervisors on how to secure them and limit the attack surface on the hypervisor itself

RVTools 4.1.3 – Free VMware best practices and health analyzer

Donnerstag, Mai 13th, 2021

  RVTools – provides one of the easiest ways to get certain inventory information your VMware vSphere environment

 

RVTools 4.1.3 – Free VMware best practices and health analyzer

Donnerstag, April 15th, 2021

RVTools – provides one of the easiest ways to get certain inventory information your VMware vSphere environment

VMware vSphere 6.x/7.x – contain a use-after-free vulnerability in the XHCI USB controller

Freitag, November 20th, 2020

VMware vSphere – VMFS is a clustered file system that disables by default multiple virtual machines from opening and writing to the same virtual disk *.vmdk file

Samstag, Juli 4th, 2020

The VMware vSphere multi-writer option allows VMFS backed disks to be shared by multiple virtual machines this option is used to support VMware fault tolerance which allows a primary virtual machine and a standby virtual machine to simultaneously access a *.vmdk file

VMware Lifecycle Product Matrix – Supported Products, as of June 1, 2020

Freitag, Juni 12th, 2020

VMware vSphere – how to check NVMe Drives Total Bytes Written (TBW) with PowerCLI

Montag, März 16th, 2020

A maximum Total Bytes Written (TBW) guarantee is typically provided by the vendor in their specifications this value describes how data can be written to the entire device until the warranty expires and the current value can be checked with S.M.A.R.T.

 

Connect to the ESXi Host with SSH Identify NVMe drives

# esxcli nvme device list
HBA Name Status Signature
——– —— ———————
vmhba0 Online nvmeMgmt-nvme00610000

Get the „Data Units Written“ counter

# esxcli nvme device log smart get -A vmhba0 |grep Written
Data Units Written: 0xe1c78d

The counter is hexadecimal and convert it to decimal this can be done also from the command line

# printf „%d\n“ 0xe1c78d
14796685

VMware vSphere 6.7 – USB Network Native Driver

Montag, Februar 24th, 2020

USB Network Native Driver – the ASIX USB 2.0 gigabit network ASIX88178a, ASIX USB 3.0 gigabit network ASIX88179, Realtek USB 3.0 gigabit network RTL8152/RTL8153 and Aquantia AQC111U

VMware vSphere 6.7 – a NUMA deep dive

Samstag, Februar 22nd, 2020

VMware vSphere 6.7 – Virtual Machine vCPU and vNUMA Rightsizing

Samstag, Februar 22nd, 2020

VMware vSphere 6.7 – larger and more demanding workloads like databases on top of the latest generations of processors with up to 24 cores special care must be taken in vCPU and vNUMA configuration to ensure performance is optimized

This table outlines how a virtual machine should be configured on a dual socket 10 core physical host to ensure an optimal vNUMA topology and performance regardless of vSphere version where the assigned memory is less than or equal to a pNUMA node

This table outlines how a virtual machine should be configured on a dual socket 10 core physical host to ensure an optimal vNUMA topology and performance regardless of vSphere version where the assigned memory is greater than that of a pNUMA node

Nvidia Tesla P4 GPU – designed to optimize complex graphics operations and enable them to run at high performance without overloading the CPU

Mittwoch, Februar 19th, 2020

VMware vSphere 6.7 – Client IP Pools

Samstag, Februar 8th, 2020

VMware vSphere 6.7 – Client IP Pools

VMware vSphere 6.7 – if a CPU has more than 32 cores a additional CPU licenses will be required

Freitag, Februar 7th, 2020

Update to VMware’s per-CPU Pricing Model

VMware vSphere ESXi – host displays an error and fails to boot when two ESXi installations are on the same system

Donnerstag, Januar 23rd, 2020

VMware vSphere ESXi – host displays an error and fails to boot when two ESXi installations are on the same system

VMware Lifecycle Product Matrix – Supported Products, as of January 1, 2020

Samstag, Januar 4th, 2020