The Vormox blog
Guides, deep dives and product news on automating Proxmox VE at scale.
Blog posts
How to Change a VM's VMID in Proxmox VE (Renumber a Virtual Machine or Container Safely)
There's no button to change a VMID in Proxmox VE, but there is a safe workaround. Here's how to renumber a VM or container using a full clone or a backup-and-restore cycle.
How to Create an Additional Network Bridge in Proxmox VE (Isolated Internal Network for VMs and Containers)
Learn how to add a second Linux bridge in Proxmox VE for a fully isolated network — ideal for testing firewall VMs, sandboxing untrusted guests, or building a private backend network with no extra hardware.
How to Set Backup Retention Rules in Proxmox VE (Keep-Last, Keep-Daily, and More Explained)
Proxmox VE keeps every vzdump backup forever unless you tell it otherwise. Here's how to configure keep-last, keep-daily, and the other retention counters on local, NFS, or CIFS backup storage.
How to Import a QCOW2 or VMDK Disk Image Into a VM in Proxmox VE (qm importdisk Explained)
Got a cloud image or a VMware-exported disk instead of an installer ISO? Here's how to pull it into Proxmox VE with qm importdisk, attach it, and get it booting.
How to Boot an Older Kernel in Proxmox VE (And Pin It So It Sticks)
A new Proxmox VE kernel broke your GPU passthrough or NIC driver? Here's how to boot back into the kernel that worked, pin it with proxmox-boot-tool so updates stop switching you back, and safely remove the pin once the regression is fixed.
How to Install and Configure Fail2ban on Proxmox VE (Block Brute-Force Login Attempts)
Bots scan the internet around the clock looking for open logins. Here's how to install fail2ban on Proxmox VE and automatically ban IPs that hammer your web UI or SSH with failed login attempts.
How to Increase CPU Cores and RAM for an LXC Container in Proxmox VE (pct set Explained)
Your LXC container outgrew its original cores and memory? Here's how to safely add more of both using pct set or the web GUI, and why some app changes need a restart while others don't.
How to Install Home Assistant Container in an LXC on Proxmox VE (Docker-Based Setup)
Skip the dedicated VM. Here's how to run Home Assistant Container in Docker inside a Proxmox LXC, including the nesting and keyctl settings most guides leave out.
How to Uninstall Proxmox VE and Revert Your Server Back to Plain Debian
Tried Proxmox VE on an existing Debian box and want it back to plain Debian without a full wipe? Here's the safe, step-by-step way to remove it without breaking your kernel or losing your data.
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