Does Microsoft KB5021131 break vCenter login?

Does Microsoft KB5021131 break vCenter login?

Microsoft published a security update for Windows. If you see my blog posts, you will see, I am no Microsoft-guy. But there are some rumors about KB5021131. Does it break VMware vCenter login? What is KB5021131 about Microsoft will enforce applications to use the more secure AES algorithm for Kerberos encryption instead of the unsecure RC4-HMAC. For sure a good idea! Statement from KB5021131: This […]

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VMware Security Hardening Guides and how to check compliance

VMware Security Hardening Guides and how to check compliance

In times of Ransomware , security breaches and exploits it is more and more important to harden every layer of IT infrastructure. This blog post is about hardening options of VMware layers. I will describe the concept of the VMware Security Hardening Guides and how to check compliance with VMware Operations Manager.

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How to isolate NBD backup traffic in vSphere

How to isolate NBD backup traffic in vSphere

A new feature in vSphere 7 is the ability to configure a VMkernel port used for backups in NBD (Network Block Device) respectively Network mode. This can be used to isolate backup traffic from other traffic types. Up to this release, there was no direct option to select VMkernel port for backup. In this post I show how to isolate NBD backup traffic in vSphere. […]

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Scripting Veeam SureBackup with tag-based backup jobs – Workaround

Scripting Veeam SureBackup with tag-based backup jobs – Workaround

This post might be interesting for anyone who scripts Veeam SureBackup in any form. In this case you probably use the script of Luca Dell’Oca: How can you test 1000 VMs with Veeam SureBackup? This script is great and works just fine! A limitation here is that it is not possible to change default timeouts for boot and application initialization. Honestly this was a limitation […]

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Analyze Veeam backup job selection with PowerShell

Analyze Veeam backup job selection with PowerShell

In this short post I show how to analyze Veeam backup job selection with PowerShell. I share two simple code snippets. The first will list all Veeam backup jobs with selected object types for VM backup. These can be Virtual Machines, Tags, Hosts and so on. Second part will show all jobs that use different object types. This can be very helpful to get an […]

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vCenter does not start after changing DNS servers

vCenter does not start after changing DNS servers

Recently I had to change DNS server in a VMware vSphere vCenter Appliance (VCSA). Normally this works without further issues. This time it was different. vCenter services did not start after changing DNS servers. I describe in this short post what went wrong and how I could fixed it.

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Comparison of vSphere Transport Modes

Comparison of vSphere Transport Modes

Each time I talk to customers at installation dates or health-checks, I spend some time talking about vSphere transport modes. These are: Direct Storage Access, Storage Integration (I take this as a separate mode), Virtual Appliance and Network mode. This is a topic with a lot of facets still not widely known. This comparison of vSphere transport modes is based on a few characteristics. I give some detailed information for Veeam […]

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Does ESXi host survive persistent boot device loss?

Does ESXi host survive persistent boot device loss?

In this post I investigate what happens when a VMware vSphere ESXi host loses its boot device. This device is meant to be a persistent device. For non-persistent devices like USB- and SD-card, behavior is quite clear: whole ESXi OS runs in memory, no mass-write operations should be directed to the device. When it breaks, ESXi isn’t missing it and keeps running.

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3 reasons why direct SAN restore failover to NBD with Veeam VBR

3 reasons why direct SAN restore failover to NBD with Veeam VBR

Backups of VMware vSphere VMs can be done with one of three transport modes. Each of these modes also provide the possibility to restore data. This post is about 3 reasons why direct SAN restore failover to NBD with Veeam Backup&Replication (VBR).

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New in Veeam VBR v11: Combine vSphere Tags

New in Veeam VBR v11: Combine vSphere Tags

In Veeam Backup & Replication (VBR) there are a few ways to select VMs for backup. One of this is to use VMware vSphere tags. New in v11 is the possibility to combine vSphere tags for VM selection. I want to show how this works.

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