Hi r/selfhosted,

I have been building LanGuard, an open-source network visibility tool for home networks and homelabs.

I wanted something between a basic device list and a full enterprise monitoring stack: an interface that discovers devices, keeps their history, organizes them into rooms, and makes network changes easy to understand.

Current features include:

• Automatic LAN discovery using ARP, reverse DNS, mDNS, LLMNR, SSDP, and NetBIOS
• Online/offline tracking, scan comparison, common port monitoring, and device history
• Hostname, vendor, role, and identity-confidence detection
• A visual Home Map for organizing rooms and devices
• Discord and Telegram notifications
• AdGuard Home integration with per-device DNS activity and blocked-query totals
• Inventory import/export and WatchYourLAN migration
• Docker Compose deployment and a native macOS version

LanGuard does not capture packet contents or inspect application traffic. The AdGuard integration stores aggregated domain counters rather than raw DNS responses.

One deployment detail worth mentioning: the Docker scanner uses host networking and privileged access so it can perform ARP-based LAN discovery.

GitHub: https://github.com/hillaliy/LanGuard

I would appreciate feedback from the self-hosted community, particularly about device identification, DNS integrations, and which network-controller integration would be most useful next.