#!/bin/sh

SERVER='10.10.10.1 10.10.10.2 10.10.10.3'

for IP in $SERVER
do
	echo "[ $IP ]"
	nmap -sT -p21-1024 $IP | egrep '^[0-9]' > $IP.status
	test -f $IP.oldstatus || touch $IP.oldstatus
	diff $IP.status $IP.oldstatus | tee risultato
	mv $IP.status $IP.oldstatus
	cat risultato >> differenze
done

if test -s differenze
then
	TESTO=`cat differenze`
	sendmail -t -f mail@dominio.it <<EOF
From: Checkup <mail@dominio.it>
To: Luca <cellulare@sms.omnitel.it>
Subject: checkup

$TESTO
EOF
fi
rm -f risultato differenze