From Wikipedia, the free encyclopedia
Original author(s)Craig Leres
Developer(s)Lawrence Berkeley National Laboratory Network Research Group
Initial releasev1.0 Tue Jun 16 3:05:31 PDT 1992
Stable release
3.3 / March 26, 2022; 23 months ago (2022-03-26)
Written inC
Operating systemCross-platform
Available inEnglish
TypeComputer security
License3-clause BSD source with autoconf parts under GNU General Public License

arpwatch is a computer software tool for monitoring Address Resolution Protocol traffic on a computer network.[1] It generates a log of observed pairing of IP addresses with MAC addresses along with a timestamp when the pairing appeared on the network. It also has the option of sending an email to an administrator when a pairing changes or is added.

Network administrators monitor ARP activity to detect ARP spoofing, network flip-flops, changed and new stations and address reuse.

arpwatch was developed by Lawrence Berkeley National Laboratory, Network Research Group, as open-source software and is released under the BSD license.

See also[edit]


  1. ^ "arpwatch(8) manual page". Retrieved 2015-01-07.

External links[edit]