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Dynamic DNS via web server, vbScript and Task Scheduler

A couple scripts in php and vbScript along with a couple setup instructions to setup an automatic dynamic domain name server updating system.

This project contains:

  • php code
  • vbScript code
  • setup Instructions and references

Requirements

  • Webserver that runs php
  • API key that can access dns-* methods
  • host name for the domain name
  • windows OS that can run Visual Basic Scripts
  • Task Scheduler on Windows OS

Code Example

Once setup the vbScript makes an HTTP request to

http://mydomain.com/myscript.php?host=&passwd=&ip=

Motivation

Originally the Dynamic DNS updating was performed by DynDNS service which was free of charge. Since they moved onto a payment model the account associated to the address being updated was deleted. This motivated the creation of a self maintained Dynamic DNS service using web hosting at dreamhost that was being paid for anyway.

Installation

  • Create an API Key with Function Access ** dns-(asterix) ** this includes All dns functions
  • dns-add_record
  • dns-list_records
  • dns-remove_record
  • Add a custom DNS record with the hostname that you wish
  • Type: A
  • Value: any IP address as we will update this
  • Install and configure the php script on your webserver. Following instructions at Dreamhost Wiki
  • ssh into your webspace
  • goto a web accessible directory and download the php script dyndns.php
  • change the access rights and modify the script to include your
  • '$DH_API_KEY', setting the value to the API key given
  • '$HOSTS' to limit it to only the dns entries you wish to allow modification to
  • '$PASSWD' to protect this page

  • Download and configure the vbscript to the computer in the network you want to update the host domain name from

  • Setup a repetitive task with the windows task scheduler to call this script.

All done.

API Reference

Tests

  • Server Side setup only test

  • With the API Key, the hostname reserved and the php script downloaded and configured you can manually test the update.

  • Open a webbrowser and open the following url

  • http://mydomain.com/dyndns.php?host=&passwd=&ip=

  • You should see the result.

Contributors

Any suggestions to improvements are welcome. I must say this is just a quick mock up but works fine.

License

The php script is found through dreamhost wiki here. I only have a copy of it here for backup purposes and for completeness of the required scripts. Fell free to use the script as you wish.