#!/bin/ksh

subnet=x.x.x.x/xx

mkdir -p $HOME/arp/
cd $HOME/arp/
nmap -sn $subnet >/dev/null
nmap -Pn -T4 -sU -p66 $subnet >/dev/null
arp -a | sort -V > `date +%s`
diff -bu `ls -1 | tail -2 | head -1` `ls -1 | tail -1`

#*/5 * * * * /root/bin/arpcheck.ksh