No-ip dynamic DNS for routers that won't accept no...

Question

For those of you who have abandoned the hopeless BT hub and have gone for another router that doesn't offer no-ip as a dynamic DNS server (e.g. the Netgear DGN1000 router) there is a simple solution. Go to http://no-ip-duc.software.informer.com/4.0/ and download the app. Set it up as per the help instructions and use the File menu to make it a server and also to operate when you log on to yoour PC. Make sure you select your free no-ip address (i.e. make sure all 3 items on its screen have green ticks). It will take care of updating your WAN IP address at no-ip. For no-ip free users you can't change the update rate to automatically update other than every 5 minutes but, for free, that's pretty good!
For those of you who don't know, BT change your WAN IP address at arbitrary intervals - a free account with no-ip allows you to access a PC, webcam, whatever on your home network from the internet despite the changes to your WAN IP address.

Answer 1

I currently use cloudflare as the DNS servers for my domain as it's free and allows to update certain records with their API. I only use it for IPv4, but since they support AAAA records, I assume it will work for IPv6 just as well. It should be quite simple for you to update the script to get the ip of a given interface instead of fetching it from the net.
#!/bin/sh
# modified by jfro from http://www.cnysupport.com/index.php/linode-dynamic-dns-ddns-update-script
# Uses curl to be compatible with machines that don't have wget by default
# modified by Ross Hosman for use with cloudflare.
cfkey=<your api key>
cfuser=<your username>
cfhost=<hostname you want to update>
WAN_IP=`curl -s http://icanhazip.com/`
if [ -f $HOME/.wan_ip-cf.txt ]; then
OLD_WAN_IP=`cat $HOME/.wan_ip-cf.txt`
else
OLD_WAN_IP=""
fi
perl -i -pe 'chomp if eof' /var/log/cfclient.log
if [ "$WAN_IP" = "$OLD_WAN_IP" ]; then
echo -ne "." >> /var/log/cfclient.log
else
echo $WAN_IP > $HOME/.wan_ip-cf.txt
echo -ne "\nUpdating IP to $WAN_IP\n" >> /var/log/cfclient.log
curl -s https://www.cloudflare.com/api.html?a=DIUP\&hosts="$cfhost"\&u="$cfuser"\&tkn="$cfkey"\&ip="$WAN_IP" >> /var/log/cfclient.log
fi
echo -ne "\n" >> /var/log/cfclient.log