arpwatch: arpwatch (Monitoring tools for tracking IP addresses on a network) arpwatch: arpwatch: The arpwatch package contains arpwatch and arpsnmp. Arpwatch and arpwatch: arpsnmp are both network monitoring tools. Both utilities monitor arpwatch: Ethernet or FDDI network traffic and build databases of Ethernet/IP arpwatch: address pairs, and can report certain changes via email. arpwatch: arpwatch: Homepage: http://ee.lbl.gov/ arpwatch: arpwatch: arpwatch: