Networking
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Proxmox Ports: Which Ones to Open, and for What
Every port Proxmox VE listens on: the 8006 web GUI, console and SPICE, corosync 5405-5412, migration 60000-60050, plus Ceph and Backup Server.
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Proxmox Firewall Not Working? host.fw & the Enable Chain
Why Proxmox VE firewall rules do nothing: the three enable switches, where host.fw lives, pve-firewall localnet, and defaults that avoid lockout.
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Proxmox Network Bridges and VLANs: vmbr0, Tags, and OVS
How Proxmox VE networking works: Linux bridge vs Open vSwitch, VLAN-aware bridges, tagging guests, and applying changes without locking yourself out.