ping -c3 10.8.3.0 > pingreport
result=`grep "0 received" pingreport`
truncresult="`echo "$result" | sed 's/^(.................................).*$/1/'`"
if [[ $truncresult == "3 packets transmitted, 0 received" ]]; then
  pon VPNname
fi

*/1 * * * * bash /root/vpn-check.sh > /root/cronlog.txt 2>&1

*/1 * * * * /root/vpn-check.sh > /root/cronlog.txt 2>&1

*/1 * * * * /usr/sbin/pppd call VPNname> /root/cronlog.txt 2>&1

crontab -e

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

#!/bin/bash
ping -c3 10.8.3.0 > pingreport
result=`grep "0 received" pingreport`
truncresult="`echo "$result" | sed 's/^(.................................).*$/1/'`"
if [[ $truncresult == "3 packets transmitted, 0 received" ]]; then
pon VPNname
fi

*/1 * * * * root bash /root/vpn.sh