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Omnissa Horizon certificado en Proxmox VE: dos puestos de oficina vacíos con los monitores apagados y un cliente ligero detrás de la pantalla
6 min read

Proxmox VE is now Horizon Ready, but in manual mode: you create and power off the desktops yourself

On 4 September 2026 Proxmox announced that Proxmox VE has achieved Omnissa Horizon Ready Hypervisor certification. It is real and it removes a requirement, but it lands in "Manual Provisioning Mode": the program page states that provisioning and power policy are not supported. Meanwhile, Horizon has been integrating over the API with another non-vSphere hypervisor since December. Two different regimes, what Horizon stops doing for you, the RAM and GPU arithmetic nobody runs, and which estates this is a way out for today.

Virtualization Proxmox Workplace
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Memoria por niveles de VMware: NVMe local haciendo de RAM en un servidor ESX
9 min read

NVMe standing in for RAM: memory tiering works if half of yours is idle

VMware refines memory tiering in Cloud Foundation 9.1, available since 9.0: cold pages demoted from DRAM to a local NVMe drive so a host ends up with more memory than you bought. What almost nobody quotes is the recommendation VMware itself published on its blog on 6 August: keep active memory below 50% of physical memory. The requirements, the limits, what is known about the 25% of workloads that does not fit today, and why a memory reservation does not get you out of it.

VMware Virtualization Infrastructure
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Parte trasera de un rack abierto con servidores apilados y cables de red recogidos con bridas
11 min read

Migrating to Proxmox: the network is not held by the cluster, it is held by each node

In a VMware to Proxmox migration everybody watches the disks. Disks are the easy part: they either arrive or they do not, and you find out straight away. What gets left out of the luggage is the network configuration: in Proxmox VE it lives in a file on each node, outside the filesystem the cluster replicates. We go through the documentation sentence that says so, why the bridge is missing from the official list of live migration requirements, what the MAC change drags with it, the 10.0.2.x symptom that wastes hours, and how far SDN really takes you.

Proxmox Virtualization Networking
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Pasillo de un centro de datos con un rack abierto a medio poblar y un carro elevador con un servidor encima
8 min read

When NOT to migrate from VMware to Proxmox

Migrating from VMware to Proxmox is part of what we do, and there are cases where our answer is: not now. Two classic objections no longer hold — the scheduler's dynamic mode arrived with Proxmox VE 9.2 on 21 May, and Veeam 13.1 has shipped replication since 29 July. The one still standing is different: Proxmox's HA documentation describes nothing equivalent to vSphere's <em>admission control</em>, which flatly refuses to power on the machine that would break your N-1. And the <code>crs</code> factory settings decide more than people think: <code>ha=basic</code> balances by counting machines. The five cases where we tell clients to stay.

Proxmox VMware Virtualization
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Rack abierto en una sala de servidores con dos bandejas de disco a medio sacar
8 min read

10% of the VMDK is enough: the arithmetic that changes your recovery plan

The ESXi encryptor Rapid7 took apart carries a percentage parameter, and the value observed was 10: on a large VMDK it touches only a tenth of the file, and that is enough to stop it booting. Partial encryption is not new — LockFile was doing it in 2021 — but the numbers are. What it does to your response clock, why no EDR agent belongs on the hypervisor (Broadcom says in so many words that it is not supported), what the same actor does to backup services, and why swapping hypervisors is not a security control.

Ransomware Virtualization Disaster recovery
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Chasis de servidor de rack abierto sobre un banco de taller, con la tapa retirada y dos disipadores de procesador a la vista entre los bancos de memoria
8 min read

Azure stops including the VMware licence: the core count nobody does

Two weeks ago we wrote that 31 October 2026 is the end of Azure VMware Solution with the licence included. Microsoft has since published its portable licensing reference, and that is where the counting rules are: how many cores each node type has, why the distributed firewall counts every host in the private cloud even the ones you are not paying for, and which date actually governs your calendar, because it is not the August 2027 one.

VMware Licensing Azure
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Cronómetro deportivo: los cinco días entre el aviso VMSA-2026-0006 y las primeras conexiones de vCenter comprometidos a la infraestructura del atacante
6 min read

The vCenter advisory said there was no known exploitation. It held for five days

Broadcom published VMSA-2026-0006 on 29 July with no information suggesting exploitation, and that is how we quoted it here the next day. On 3 August the first compromised vCenters started connecting to attacker infrastructure, and on 12 August QUIRSO published the count: 361 victim IP addresses across 47 countries. What those numbers mean, what they do not, and the question that decides whether this concerns you: who can open a connection to your vCenter.

VMware Patching Zero Trust
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El 31 de octubre de 2026 se acaba el modelo de licencia de VMware incluida en los nodos de Azure VMware Solution: a partir del 1 de noviembre hay que aportar una suscripción portable de VMware Cloud Foundation comprada a Broadcom
8 min read

Plan B expires on 31 October: VMware with the licence included is ending in the cloud

On 31 October 2026 the Azure VMware Solution model in which the licence came bundled with the node comes to an end: from 1 November you must bring a VMware Cloud Foundation key bought directly from Broadcom. On Google Cloud VMware Engine it already happened on 1 November 2025. Eighty-nine days to go. For two years, "I will just lift my vSphere into the hyperscaler" has been the favourite plan B for not deciding; it was an extension, and extensions expire. The maths you can finish this week, and when staying put is the right call.

VMware Licensing Cloud
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VMSA-2026-0006: dos vulnerabilidades CVSS 9,8 en VMware vCenter y un escape de máquina virtual en ESX
8 min read

VMSA-2026-0006: two 9.8s in vCenter, a VM escape and the flaw nobody will look at

On 29 July 2026 Broadcom published VMSA-2026-0006: five flaws in VMware ESX, vCenter, Workstation and Fusion, two of them CVSS 9.8 in vCenter and one 9.3 that allows escaping from a virtual machine to the host. There are no workarounds. What to patch first according to the advisory itself (the order is no longer the one you knew), why updating vCenter does not stop your workloads, where the patches are if you hold a perpetual licence with no support, and why the lowest-scoring flaw — ESX may not record what an administrator does — is the one that hurts afterwards.

VMware Cybersecurity Virtualization
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