Tag Archives: Virtualization

Windows Server 2019/2022: Updates KB5031361/KB5031364 cause Hyper-V issues

[German]I got reports that update KB5031361 for Windows Server 2019 (and Windows 10 Enterprise 2019 LTSC) is causing issues with VMs running on Hyper-V. The same is reported for update KB5031364 for Windows Server 2022. The virtual machines cannot be … Continue reading

Posted in Update, Virtualization, Windows | Tagged , , , , , , | 1 Comment

Advertising

FSLogix blocks OneDrive synchronization in virtual machines

[German]Brief note for administrators who use FSLogix in the company on the one hand, but virtualize Windows instances on the other. In this combination, synchronization problems with OneDrive may occur. An error "FSLogix_unsupported_environment" is then reported. Microsoft confirmed this in … Continue reading

Posted in issue, Software, Virtualization, Windows | Tagged , , | Leave a comment

How to find weak passwords in Active Directory and eliminate them with PowerShell

[Sponsored Post]Weak or compromised passwords are a known gateway for attackers. If you are able to identify which users in Active Directory (AD) are threatened by this, then PowerShell can help to remedy it. However, PowerShell scripts cannot eliminate basic AD deficits, other tools are needed for this. More ...

KVM bug: Windows VMs can hang at boot after 11 days

[German]Over the past few months, some administrators have complained of Windows virtual machine boot issues in conjunction with the monthly security updates. In many cases, this could be traced back to VMware products such as ESXi – or turning off … Continue reading

Posted in Virtualization, Windows | Tagged , | Leave a comment

Advertising

Review of the VMware ESXi server cyberdebacle (Feb. 2023)

[German]A brief flashback to February 2023 – since the beginning of the year, numerous VMware ESXi servers have been hijacked via a known vulnerability that has long since been closed. This VMware ESXi vulnerability has a huge threat potential and … Continue reading

Posted in Security, Virtualization, Windows | Tagged , , | Leave a comment

Windows Server 2022: VMware ESXi 7.0 U3k Patch for Secure Boot Issue (Update KB5022842, Feb. 2023)

[German]VMware released VMware ESXi 7.0 U3k on Feb. 21, 2023, to address the Secure Boot issue of VMs. The background was that with the Feb. 14, 2023 patchday, an installed security update (KB5022842) for Windows Server 2022 prevented virtual machines … Continue reading

Posted in issue, Update, Virtualization, Windows | Tagged , , , , , | Leave a comment

Advertising

Parallels Desktop: Authorizes Windows 11 on Mac M1 processors

Microsoft has authorized Arm versions of Windows 11 Pro and Enterprise for the Mac with Apple silicon for use in a virtual machine hosted with Parallels Desktop for Mac. IT administrators can now allow their users to run Windows 11 … Continue reading

Posted in macOS, Virtualization, Windows | Tagged , , | 1 Comment

Do we need RDS licenses for Citrix Virtual App/Desktop environments?

Do we actually need Microsoft RDS licenses if we run an environment with Citrix Virtual App/Desktop? Citrix has discussed this in the article Do We Need RDS Licenses For Citrix Virtual App/Desktop Environment. Short answer: yes, you need both Citrix … Continue reading

Posted in General, Software, Virtualization, Windows | Tagged , , , | Leave a comment

How to log off disconnected Citrix sessions after 1 hour via power shell

[German]A short tip for administrators of Citrix solutions (Citrix Virtual Apps and Desktops Service). Sometimes administrators are need to log off users whose sessions have been in disconnected state for a long time. There is a PowerShell solution from Citrix … Continue reading

Posted in Virtualization, Windows | Tagged , , , | Leave a comment

Advertising

Mandiant, VMware and US-CERT warn of malware targeting VMware ESXi servers

[German]Google-acquired security vendor Mandiant has encountered a new malware family (VirtualPITA, VirtualPIE, and VirtualGATE) that targets virtualization solutions like VMware ESXi Server and uses specialized techniques to infiltrate. VMware has issued a security advisory to that effect, and US-CERT is … Continue reading

Posted in Security, Virtualization | Tagged , , | Leave a comment

VMware ESXi: Retbleed fixes cause 70% performance loss in Linux VMs running kernel 5.19

In performance regression testing, VMware testers found a severe performance drop for Linux guests when running kernel 5.19 in a VMware ESXi virtual machine with the Retbleed fixes installed. The degradation was up to 70% for computing, up to 30% … Continue reading

Posted in Linux | Tagged , | Leave a comment