Dynamic DNS Update Script

#!/bin/ksh

echo start >> update.log

date >> update.log

lynx -dump http://192.168.123.254/status.htm | grep 'IP Address' > new-ip.dat

cat new-ip.dat >> update.log

ip=`sed -e 's/IP Address//; s/ //g' new-ip.dat`

if [ $ip = "0.0.0.0" ]

then

        echo reviving connection >> update.log

        ping -c 1 www.google.com > /dev/null

        ping -c 1 www.paypal.com > /dev/null

        echo revival quick exit >> update.log

        rm new-ip.dat

        exit

fi

echo checking for change >> update.log

cmp new-ip.dat cur-ip.dat > /dev/null

if [ $? != 0 ]

then

        echo change detected >> update.log

        cp new-ip.dat cur-ip.dat

        echo change detected >> update.log

        cp new-ip.dat cur-ip.dat



        echo ------.fw.nu sitelutions.com

        lynx -dump "https://www.sitelutions.com/dnsup?user=xxxxx&pass=yyyyyy&id=zzzzzzz&ip=$ip" >> update.log



        echo check ok? for ae.dyndns.org >> update.log

        if [ "`sed -e 's/ .*$//' last-update.dat`" == "good" ]

        then

                echo go for update ae.dyndns.org >> update.log

                lynx -dump -auth=xxx:yyy "https://members.dyndns.org/nic/update?hostname=zzz.dyndns.org&myip=${ip}" > last-update.dat

        fi

fi

echo exiting >> update.log

rm new-ip.dat