Proxmox VLAN — No Physical Switch Required
Your VMs are talking to each other. You didn't allow that.
By default, every VM on Proxmox lands on the same virtual bridge. Same segment. Same broadcast domain. No isolation — unless you configure it.
Most homelab guides don't tell you that. This one does.
In this episode we expose the flat network problem that ships with every default Proxmox install. We demonstrate it live — Kali VM pinging a Windows VM with no firewall rule allowing it — then fix it using Proxmox SDN (Software Defined Networking) without touching a single piece of hardware. We walk through creating an SDN zone and VNet, show the one step most people miss (the Apply button that actually pushes config to the host), and prove isolation works by running the same ping after the fix. No response. Same box. Different result. After watching this episode you can isolate VM traffic on your Proxmox host using nothing but software — no managed switch required.
00:00 — Cold Open
00:08 — Intro
00:10 — The Problem
01:11— The Proof
03:57 — The Reframe
04:48 — What's Next
SOFTWARE USED:
Proxmox VE (free) — proxmox.com/en/proxmox-virtual-environment/overview
OPNsense (free) — opnsense.org
Kali Linux (free) — kali.org
🔧 GEAR USED IN THIS VIDEO
Beelink EQ14 Mini PC — https://amzn.to/4bA4WGL
HDMI Capture Card — https://amzn.to/4bA4WGL
*Some links above are Amazon affiliate links. If you purchase through these links I may earn a small commission at no extra cost to you. I only recommend hardware I actually use in my lab.
// SUDOROB DISCLAIMER
The content provided in this video is for Educational and
Informational Purposes Only. All demonstrations were performed
on a private, controlled network owned by the creator. The
software and techniques demonstrated (Wireshark, Kali Linux,
Network Analysis) are standard industry tools used by
cybersecurity professionals.
Some links above are Amazon affiliate links. If you purchase through these links I may earn a small commission at no extra cost to you. I only recommend hardware I actually use in my lab.
#proxmox #proxmoxvlan #homelab #selfhosted #proxmoxsdn #networkisolation #homelabsecurity #virtualization #SudoRob #opnsense