Ubuntu - Domain on dynamic IP using DIR-300+no-ip+zoneedit (professionals)

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So being a pro tutorial we won't go in to details, you have :

1. Router DIR-300

2. No-IP account

3. Zoneedit account

4. Ubuntu Server with :
- noip2 installed and configured
- wget installed

You know how a domain can be hosted on a dynamic IP (to get an ideea just search the thread for the beginners) but you wan't to have an instant update when your IP changes, but at the same time you don't want to be banned for flooding.

For that after configuring your zones in zone edit lets say :

- example.com A 11.11.11.11

- www CNAME example.no-ip.org

- stats CNAME www.examle.com

You use this script to detect on your DIR-300 if the ip had changed, and if it has, only then you request an update to zoneedit and no-ip.

Please pay attention to passwords,users,domainnames,accounts that have to be changed in order to have the script full functional (marked in red).

Put this script in /var/ipdynamic

#!/bin/sh

DATA=$(date)

#get the WAN IP from DIR-300 Router
IP=$(wget "http://[COLOR="red"]your.dir300.local.ip[/COLOR]/st_device.php?LOGIN_USER=[COLOR="Red"]dir300username[/COLOR]&LOGIN_PASSWD=[COLOR="red"]dir300password[/COLOR]&ACTION_POST=LOGIN" -O - -q | grep '<td class="l_tb"><div id="wanipaddr">&nbsp;' | cut -d";" -f 2 | cut -d"<" -f 1)

# check the ip from no-ip.org
OLDIP=$(dig +short [COLOR="red"]examplecom.no-ip.org[/COLOR]|head -n 1)

# verify if the IP from DIR-300 is diffrent from that updated on no-ip
if [ "$IP" != "$OLDIP" ]; then

    echo "===========================================================================================" >> /var/ipdynamic/logip.txt

    echo "<<<<<<<<<<<<<< "$DATA" - New IP : "$IP" >>>>>>>>>>>>>>" >> /var/ipdynamic/logip.txt

    noip2 -i $IP >> /var/ipdynamic/logip.txt 2>&1 #Update the new IP to No-IP

    echo "===========================================================================================" >> /var/ipdynamic/logip.txt

    wget  --no-check-certificate -O - --http-user=[COLOR="red"]zoneedituser[/COLOR] --http-passwd=[COLOR="red"]zoneeditpass[/COLOR] 'https://dynamic.zoneedit.com/auth/dynamic.html?zones=[COLOR="Red"]domain.name[/COLOR]' >>/dev/null 2>&1 #update the new IP to zoneedit

fi

Then execute this script every minute using crontab

After that you enter nameservers provided by zoneedit to your registrar

The main ideea is that using this implementation you'll avoid flooding no-ip and zoneedit while having almost instant updates with your new IP