aiRedirectWww is a native Joomla! 1.5.x plugin developed by Algis Info Grup.
You can use it to automatically redirect your Joomla site from the domain using www to the domain without www, or the other way around.
There are other solution to do this redirect ( like using .htaccess or 3rd party SEF extensions ) but I needed a simple way and this plugin is the result.
It's working only on Joomla! 1.5.x in native mode.
Download the last version of the plugin from http://www.algisinfo.com/download/joomla/joomla-1-5-x.html and install it using the default install procedure of Joomla!.
The upgrade is done by installing the new version of the extension over the old one.
The removal of the old version is not required and it's parameters will not be reseted.
A full back-up of the site is always recommended before the upgrade is done.
Here are the instructions for each it's parameters :Redirect to WWW