Afraid ORG FreeDDNS IP Updater

ip_updater.sh

#!/bin/sh
#freedns.afraid.org updater script

# Get your update url at http://freedns.afraid.org/api/ and click XML
UPDATEURL="http://freedns.afraid.org/dynamic/update.php?"
DOMAIN="aaaa.mooo.com"

DDNS=$(nslookup $DOMAIN|tail -n2|grep A|sed s/[^0-9.]//g)
MYIP=$(curl -s "http://api.ip.pe.kr/")
echo "DDNS IP: $DDNS"
echo "Server IP: $MYIP"
if [ "$DDNS" != "$MYIP" ]; then
  echo "Server's IP Changed! Updating DDNS..."
  wget -q -O /dev/null $UPDATEURL
  echo "DNS Updated on "; date
else
  echo "IP not changed!"
fi