Netdiscover

What it does

Netdiscover sweeps a LAN with ARP requests to enumerate live hosts and MAC addresses, even on networks without DHCP. A quick way to map an internal segment.

Common use cases

• •Map live hosts on an internal Ethernet segment during the first minutes of an engagement.
• •Identify rogue devices and unknown hardware by their MAC OUI on a corporate LAN.
• •Passively monitor ARP traffic over time to build a continuous inventory of network devices.

Key features

• •Uses ARP requests for fast local network discovery without port probes.
• •Displays live MAC addresses with vendor OUI lookup for hardware identification.
• •Supports both active sweeping and passive listening modes.
• •Lightweight and runs on any Linux system with raw socket access.

Source