net/arp-scan 1.10.0p1 OpenBSD

arp-scan is a command-line tool for system discovery and fingerprinting. It constructs and sends ARP requests to the specified IP addresses, and displays any responses that are received.

arp-scan allows you to:

\* Send ARP packets to any number of destination hosts, using a
configurable output bandwidth or packet rate.

      This is useful for system discovery, where you may need
      to scan large address spaces.

\* Construct the outgoing ARP packet in a flexible way.

      arp-scan gives control of all of the fields in the ARP
      packet and the fields in the Ethernet frame header.

\* Decode and display any returned packets.

      arp-scan will decode and display any received ARP packets
      and lookup the vendor using the MAC address.

\* Fingerprint IP hosts using the arp-fingerprint tool.