web-nsupdate: A Lightweight Dynamic DNS Service
For instance, after my router renews its host address, it runs:
wget -q -O- "http://www.example.com/web-nsupdate.php?host=home-router.example.com&addr=111.222.333.444&key=xxxxxxxx"
(Sorry for long line above. Click on switch to printable format at the very bottom of the page to see better.)
This tells the web-nsupdate service running on www.example.com to set the host address of home-router.example.com. The key value is a secret password that authorizes the update.
The web-nsupdate package is posted here.
It is, unfortunately, not all that easy to get going. It isn't that tough to setup web-nsupdate itself. The difficulty is that the BIND dynamic DNS configuration is a pain. You have to generate a key, update configurations, and modify zone files. The README file in the distribution leads you through the process, so I hope that's some help to even DNS newbies.
Stay tuned ... in my next blog entry I'll provide some further information on deploying web-nsupdate.