WatchYourLAN Network Scanner on Ubuntu 24.04 LTS | cloudimg
by cloudimg
Know every device on your network, and when that changes
WatchYourLAN is a lightweight, open source network IP scanner with a modern web dashboard. It periodically scans the network it is attached to, discovers every device it can see, and records each host's MAC address, IP address, name and hardware vendor along with a full online and offline history, so you always know what is connected.
It answers a question most networks cannot answer honestly: what is actually on this network right now, and what changed? New or unknown devices are surfaced immediately, and every host is queryable through a clean web interface and a REST API, so the inventory reads as equipment rather than as numbers and a running record builds up over time.
This cloudimg image runs the pinned WatchYourLAN 2.1.4 static binary, its checksum verified at build time, under systemd with a SQLite datastore. The scanner is driven by arp-scan on the VM's primary interface, resolved automatically on first boot, so it works the moment the instance starts.
Secure by default: WatchYourLAN ships no login of its own, so this image never exposes it directly. The application binds to the loopback interface only, an nginx reverse proxy fronts the web interface with HTTP Basic Auth, and a password unique to each VM is generated on first boot into a file only the root user can read, so no two deployments ever share a login. An unauthenticated health endpoint is provided for load balancer probes.
WatchYourLAN is MIT licensed and free to use; the cloudimg charge covers packaging, security patching, image maintenance and 24/7 support. This image is provided by cloudimg and is not affiliated with or endorsed by the WatchYourLAN project.