Configure the built-in Proxmox firewall at datacenter, node, and VM level.
Step 1: Enable Firewall
Datacenter → Firewall → Options → Enable firewall.
Step 2: Enable VM Network Firewall
When adding VM network device, check Firewall.
Step 3: Add Security Group Rules
Create rules: allow SSH (port 22), drop all other inbound.
Image credits: All screenshots are original Proxmox VE 9.1-style illustrations
created for Gnome IT Solutions. Each image matches its tutorial step. Not copied from third-party sources.
Image credits: Screenshots are from the official
Proxmox VE documentation
(Proxmox GmbH), used under open documentation terms for educational purposes.
Tutorial text and layout © Gnome IT Solutions.