#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 host.fw Location: /etc/pve/nodes/<nodename>/host.fw
See how node rules are loaded into the host firewall, why the datacenter enable flag matters, and which management ports cover SSH and the web UI.
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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.