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gate# apt install arpwatch gate# man arpwatch gate# cat /etc/default/arpwatch
... ARGS="-N -p -Q" ...
gate# systemctl enable arpwatch@eth0 --now gate# journalctl -f | grep 'flip flop' ... Mar 29 10:33:15 gate.corp13.un arpwatch[992]: flip flop 192.168.13.111 08:00:27:9f:65:95 (08:00:27:d5:6c:15) eth0