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NetAlertX
Self-hosted network visibility and presence scanner that discovers connected devices and alerts on new, unknown, or changed hosts across your LAN/Wi‑Fi.
NetAlertX is a network visibility and alerting service that scans your LAN/Wi‑Fi to discover connected devices and detect presence, reconnections, disconnects, and other changes. It helps you maintain an accurate device inventory and get notified when something unexpected appears on your network.
Key Features
- Scheduled network scans to detect new, unknown, or returning devices
- Change detection for device status and network attributes (for example IP changes)
- Multiple discovery/import methods (such as ARP scanning, DHCP lease import, Pi-hole imports, UniFi controller import, and SNMP router import)
- Extensible plugin system for custom scanners and integrations, with UI generation support
- Web UI for device inventory, status history, and network overview
- Notifications via multiple gateways (including NTFY, Pushover, Pushsafer, and Apprise-supported services)
- Integrations via API endpoints and webhooks, including smart-home workflows
Use Cases
- Detect and alert on unauthorized or unexpected devices joining a home or small-office network
- Presence detection to trigger automations when key devices arrive or leave
- Build and maintain a lightweight network source of truth and device inventory
Limitations and Considerations
- Some scan methods (notably ARP-based scanning) may not discover devices across different subnets without additional network setup
- Low-level scanning can require elevated network permissions depending on the deployment environment
NetAlertX is well-suited for homelabs and small networks where you want straightforward device discovery, change tracking, and actionable alerts. Its plugin and notification ecosystem makes it adaptable to different network setups and automation needs.
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