# NetAlertX

NetAlertX is a self-hosted network presence scanner and alert framework that monitors Wi-Fi or LAN devices, detects new, disconnected, or changed devices and IP changes, and sends notifications from scheduled scans for. It is open source and self-hosted, installable on Docker Hub and Unraid.

Canonical page: https://ourlocalhost.com/app/655/netalertx

## Description

NetAlertX is a self-hosted network presence scanner and alert framework that monitors Wi-Fi or LAN devices, detects new, disconnected, or changed devices and IP changes, and sends notifications from scheduled scans for homelab and home network visibility.

## Platform availability

Available on 2 of 9 platforms: Unraid, ZimaOS.

## Health score

31/100 (Low), based on 3 of 4 factors.
- Maintained: 0 (GitHub repository no longer exists)
- Easy to install: 45 (2 install platforms, install notes, Docker image)
- Light to run: 95 (512 MB minimum RAM, runs on ARM)

## Links

- Docker Hub: https://hub.docker.com/r/jokobsk/netalertx
- GitHub: https://github.com/jokob-sk/NetAlertX
- Unraid: https://ca.unraid.net/apps/netalertx-0mrpg4d1b8fz1t?q=NetAlertX

## Common questions

### Does NetAlertX need host networking in Docker to scan the network?

It may need host networking if the container must reach the network being scanned; one user had to set network:host in the Docker Compose file instead of using a bridge.

### Why can NetAlertX see devices in some VLANs but not others?

The container must be able to access the networks it scans. ARP scanning and ping use different protocols, so reachability can differ between VLANs.

### What PUID and PGID should I use for NetAlertX?

Set PUID and PGID to an account that can access the NetAlertX files. If they are wrong, the app may fail to save settings, write logs, or read its data.

### Why does a multi-NIC host get the same IP reported for several NICs?

On systems with multiple NICs, such as a Proxmox server, ARP responses handled by the OS can cause NetAlertX to incorrectly assign the same IP to all NICs. This creates false device mappings.

## Alternatives

- Angry IP Scanner: Open-source, cross-platform network scanner for fast, simple IP and port scanning.
- Cutware: Cutware is a free network management tool for Windows built to keep your network visible and secure.
- Fing: Network scanner discovers devices, monitors ISP performance, sets security checks.
- Koolyz
- LibreNMS: LibreNMS is a fully featured network monitoring system that discovers and monitors network devices, interfaces, and services.
- NETworkManager by BornToBeRoot
- Netdata: Netdata is a real-time performance and health monitoring solution that helps you visualize and understand the behavior of your systems.
- Nmap: Free, open-source utility for network security auditing and exploration with capabilities for OS detection, service identification, and lar…
- WatchYourLAN: Lightweight network IP scanner that tracks the devices connected to your local network and displays them in a self-hosted web dashboard.
- Zabbix: Zabbix is an enterprise-class, open-source distributed monitoring solution designed to monitor the performance and availability of network…

---
Source: Our Local Host (https://ourlocalhost.com/app/655/netalertx), the self-hosted and open-source app directory.