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Proxmox VE Post-Installation

Initial Configuration

Update system: 

apt update && apt full-upgrade -y
(Optional) Remove subscription nag:

sed -i.bak "s|data.status !== 'Active'|false|" /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js
systemctl restart pveproxy
Add no-subscription repo in /etc/apt/sources.list.d/pve-enterprise.list:

deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription
Add SSH key for secure login.

Set up storage — configure local-lvm or add additional disks via ZFS or ext4.

Setting Up a Linux Bridge in Proxmox

A Linux bridge is required to give your VMs and containers network access through your host’s physical NIC.

1. Log in to the Proxmox Web GUI: https://<proxmox-ip>:8006

2. Go to: Datacenter → Node Name → System → Network

3. Click: Create → Linux Bridge

4. Configure:

  • Name: vmbr0 (default bridge name)
  • IPv4/CIDR: Set if this bridge will have an IP (optional if only bridging traffic)
  • Gateway (IPv4): Your network gateway (only if assigning IP)
  • Bridge ports: Your physical NIC (e.g., eno1 or eth0)

5. Click: Create

6. Apply changes: Click Apply Configuration and confirm.

7. (Optional): Edit your VM or LXC container’s network settings to use vmbr0 as the bridge.