Install ipwatchd by entering the following commands in the terminal:
sudo apt update sudo apt install ipwatchd
Description:
IP conflict detection tool
IPwatchD is a simple daemon that analyses all incoming ARP packets in order to detect IP conflicts on Linux. It can be configured to listen on one or more interfaces (alias interfaces are also supported) in active or passive mode. In active mode IPwatchD protects your host before IP takeover by answering Gratuitous ARP requests received from conflicting system. In passive mode it just records information about conflict through standard syslog interface.
Homepage: http://ipwatchd.sf.net
Version: 1.2.1-1build1
Section: universe/net