lanmap

A live LAN scanner with a terminal dashboard. Shows all devices on your network with real-time ping, MAC addresses, and vendor identification.

Features

• Auto-detects your local subnet (/24)
• Parallel ICMP ping sweep — all 254 hosts concurrently
• Finds hosts that block ping but answer ARP (e.g. Windows firewalls)
• MAC address lookup via ARP cache (Windows and Linux)
• Vendor identification from OUI (Apple, Samsung, ASUS, TP-Link, and more)
• Detects MAC randomization (iOS / Android privacy MACs)
• Reverse DNS hostname resolution
• "★ new" badge for devices that join while lanmap is running
• Offline hosts show when they were last seen
• Sort by IP, latency, hostname, or last seen; filter to online-only
• Export the current scan to JSON
• Live ratatui TUI with animated scanning indicator
• Auto-rescan every 30 seconds

Usage

Requires Administrator / root for raw ICMP sockets.

lanmap

Override subnet manually (useful when on VPN; /16 is the maximum sweep size):

lanmap --subnet 192.168.1.0/24

Keybindings

Key	Action
r	Force rescan
e	Export scan to lanmap-<unixtime>.json
s	Cycle sort (IP → latency → hostname → last seen)
f	Toggle online-only filter
↑ / k	Navigate up
↓ / j	Navigate down
q / Esc	Quit

Build

cargo build --release
./target/release/lanmap

Stack

• surge-ping — async ICMP
• ratatui + crossterm — TUI
• network-interface — interface detection
• dns-lookup — reverse DNS
• tokio — async runtime