A tool for resisting arp spoofing on networks.

emerge net-analyzer/arpon

# /etc/conf.d/arpon

LOGFILE="/var/log/arpon.log"
ARPON_OPTS="--harpi --iface-auto --log --log-file ${LOGFILE}"

In arch this file seems to be named /etc/arpon.conf.

# /etc/arpon.sarpi

10.13.37.1   04:18:d6:f1:0b:d2

rc-update add arpon default
service arpon start