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World desk3 min

Find and Label LAN Devices with a Lightweight Self-Hosted Scanner

LAN Orangutan uses nmap to find network devices and preserves labels, groups, and notes across scans, with a web dashboard and CLI.
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If you want to see what is on your local network and keep track of which device is which, LAN Orangutan is a close fit: it uses nmap to discover devices, then lets you save labels, groups, and notes that carry across scans. It offers a web dashboard and command-line interface without expanding into a full security-monitoring suite. The assignment’s headline does not name a product, so LAN Orangutan is best treated as a well-supported example, not a confirmed identification.

What LAN Orangutan does

LAN Orangutan scans networks using nmap and gives you a persistent inventory of what it finds. You can label devices, group them, and add notes, so a later scan is easier to interpret than a list of unfamiliar IP addresses. The project provides a live web interface as well as a CLI, including JSON output and CSV export. The official repository describes its features and deployment options.

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The project’s stated philosophy is: “LAN Orangutan isn’t trying to be the most powerful scanner out there, and that’s the point.” That trade-off is useful to keep in mind: it is aimed at discovery and keeping track of devices, not at replacing a broader security-monitoring system.

How setup works

The project describes LAN Orangutan as a cross-platform, single-binary application with no application dependencies. Nmap is a separate prerequisite: install it, download and run the application, then open its local dashboard. The project site documents this basic flow. Raspberry Pi is shown as one possible host, but no particular model is required; a compatible Linux, macOS, or Windows computer can also serve.

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That small setup is not the same as zero configuration. You still need to install nmap and choose where the scanner can see the networks you want to inspect. If you want an always-on inventory, the host must remain available to run scans.

What to check before scanning

Multiple networks and Tailscale

LAN Orangutan supports scanning multiple networks and discovering Tailscale peers. The Tailscale integration requires the host’s Tailscale CLI. The project notes that its standard Docker setup cannot see a Tailscale installation on the host, so do not assume a container can use that integration without changing the deployment.

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  • EXCLUSIVE ONE-TO-ONE CONNECTION: Features a secure single-user access system to ensure data integrity and stable performance. While devices are visible to multiple users on the network, only one computer can connect and control a specific device at a time, preventing data conflicts. Ideal for sensitive hardware like license dongles and security keys.
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Docker and network visibility

Docker on macOS or Windows can return misleading results: the container runs inside a virtual machine, and its NAT may respond to probes. The project advises running LAN Orangutan directly on the host for this scenario. On routed networks, scans may not show MAC addresses or vendor names; those details are obtained through ARP on the same network segment, so they may be unavailable across a router.

Secure the dashboard

A network-accessible dashboard needs deliberate protection. LAN Orangutan requires initial password setup by default and stores the password as a bcrypt hash. It does not provide built-in HTTPS; for encrypted access, the project recommends using a reverse proxy or Tailscale. Disabling authentication while binding the dashboard to a network address is unsafe unless another access-control layer protects it. See the repository’s security notes before exposing the interface beyond the local machine.

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When a more capable tool may fit better

The right choice depends on whether you need a quick, labeled inventory or ongoing security and infrastructure context. The projects describe different scopes; these are feature descriptions, not results of independent comparative testing.

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Tool Emphasis described by its project Consider it when
LAN Orangutan Network discovery, persistent labels and notes, multiple networks, dashboard and CLI You want a lightweight way to find devices and remember what they are. Project repository
InSpectre Port-baseline and drift alerts, vulnerability scanning, and Docker/Proxmox integrations You need more security checks or infrastructure integrations. Project repository
LanLens Structured inventory fields, topology context, network-change awareness, notification rules, and CMDB/i-doit export You need richer documentation, topology signals, alerts, or inventory exports. Project repository

Pick based on the work you actually need done: a low-friction device list, deeper security monitoring, or a more structured inventory. Also consider where the scanner will run and whether that host can see the networks and peers you want to discover.

Quick Recap

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