#!/bin/bash

FILE=/var/run/bind/named_test_$1

case $1 in
    192.*)
	HOST=myth.svh.merlins.org
	IP=192.168.205.61
	;;
    *)
    	fping -q -r4 -B3 $1 || exit
	HOST=www.merlins.org
	IP=209.81.13.136
	;;
esac

host $HOST $1 &> $FILE

if ! grep -q $IP $FILE; then
	cat $FILE | Mail -s "DNS server $1 does not work" mail_notice@209.81.13.136
fi