Tech Guide
Proxmox Home Lab Baseline Hardening
ProxmoxVirtualizationSecurity
A Proxmox home lab often becomes the foundation for critical infrastructure. Hardening from the start prevents security debt.
Network Isolation
Segment your lab with VLANs:
- Management network (isolated, direct access only)
- Guest network (restricted outbound, no lateral movement)
- DMZ network (for exposed services)
Configure firewall rules at the bridge level to enforce segmentation.
VM Template Security
Build minimal templates with:
- No default credentials
- SSH key-only authentication
- Automatic security updates enabled
- CloudInit for consistent provisioning
Store templates in a dedicated storage pool with backup snapshots.
Role-Based Access Control
Create operator roles with minimal privilege:
- Guests: view-only access to their own VMs
- Operators: VM start/stop, console access
- Admins: full cluster control
Never share root credentials; use token-based auth instead.
Storage Security
- Encrypt sensitive storage pools
- Use separate datastores for different trust levels
- Implement backup retention policies with off-site copies
Monitoring and Alerting
Set up Proxmox’s built-in alerting for:
- Node resource exhaustion
- Replication lag
- Failed job execution
- Unexpected cluster changes