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HOME LAB · LINUX · difficulty 5 · ~40 min · 18 steps
A doorbell camera reached the hypervisor's management interface. The VLAN was a label, not a wall.
One Proxmox host runs the lot: eleven VMs, nine containers, the firewall, the NAS front end and everything the house depends on. The IoT devices live on VLAN 30 — that is what the network diagram says, and the diagram has been right for three years. At 23:40 the web interface logged eleven hundred failed logins and then one that succeeded. The source address was on VLAN 30. If the hypervisor falls, everything inside it falls with it. Work fast, and find out what the word 'isolated' actually meant on this box.