Monatliche DynDNS-Anmeldung per Script

#! /bin/bash
# dyndnslogin
# DynDNS Settings
USERNAME="Username"
PASSWORD="Passwort"

# Variabeln
PROGNAME=dyndnslogin
COOKIE=/tmp/dyndnslogin_cookie
OUTPUT=/tmp/dyndnslogin_output
USERAGENT="Mozilla/5.0"

# Main
MULTIFORM=`curl -s -A $USERAGENT -c $COOKIE https://account.dyn.com \
  | awk -F\' '/multiform/{ print $6 }'`
curl -s --location -A "$USERAGENT" -b $COOKIE -c $COOKIE -o $OUTPUT \
  --data "username=$USERNAME&password=$PASSWORD&iov_id=&submit=Log+in&multiform=$MULTIFORM" \
  https://account.dyn.com/

if grep -E "Hi" $OUTPUT > /dev/null 2>&1
then
  echo Login successful
  date >> /var/log/dyndns.log
else
  echo Login failed
  FAILED="true"
fi

rm $COOKIE
rm $OUTPUT

if [ "$FAILED" = "true" ]
then
  exit 1
fi

# EOF

#! /bin/sh
#ddnsweblogin
#
#settings
USER="username"
PASS="passwort"
#
#variables
UA='Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6'
COOKIE=/tmp/ddnsweblogin_cookie
OUTPUT=/tmp/ddnsweblogin_output
PROG="ddnsweblogin"
LOGFILE="/tmp/$PROG.log"

MULTIFORM=$(wget -U "$UA" --save-cookies $COOKIE https://account.dyn.com/ -O - | grep -m1 multiform | tr '=' '\n' | tail -1 | cut -d "'" -f 2)
wget -O $OUTPUT -U "$UA" --load-cookies $COOKIE --save-cookies $COOKIE --post-data "username=$USER&password=$PASS&iov_id&multiform=$MULTIFORM" https://account.dyn.com/

TIMESTAMP=$(date +"%d.%m.%Y %H:%M:%S")

if grep -E "Welcome.*$USER" $OUTPUT > /dev/null 2>&1
then
  echo "$TIMESTAMP  Dyndns-Login successful" >> $LOGFILE
  echo Dyndns-Login successful
else
  echo "$TIMESTAMP  Dyndns-Login failed" >> $LOGFILE
  echo Dyndns-Login failed
  FAILED="true"
 fi
 
 rm $COOKIE
 rm $OUTPUT
 
 if [ "$FAILED" = "true" ]
then
  exit 1
fi

# EOF