Apache virtual servers

[Damien Hull]

I am trying to setup SquirrelMail. My main site should be something like 
www.example.com or example.com. To get to my webamil it should be 
something like webamil.example.com. I hope there is a way to do this.

Here's what I have so far.

Network

    * Ripcord
    * DMZ ( orange interface )
    * Web server
    * DNS server

Server

    * Gutsy Gibbon
    * LAMP install
    * Email
    * SquirrelMail
    * Webmin

Problem

    * I tried adding a virtual server for SquirrelMail
    * Didn't work
    * It all goes to /var/www
    * Or it gives me an error message

Here's what's in /etc/apache2/sites-available/default

    NameVirtualHost *

    <VirtualHost 192.168.2.3>
    ServerName www.testing-linux.com
    DocumentRoot /var/www
    </VirtualHost>

    <VirtualHost 192.168.2.3>
    ServerName webamil.testing-linux.com
    DocumentRoot /usr/share/squirrelmail
    </VirtualHost>

The above settings gave me an error message. I have also tried the 
following.

    NameVirtualHost *

    <VirtualHost *>
    ServerName www.testing-linux.com
    DocumentRoot /var/www
    </VirtualHost>

    <VirtualHost *>
    ServerName webamil.testing-linux.com
    DocumentRoot /usr/share/squirrelmail
    </VirtualHost>

It still didn't work. I hope someone out there can explain this to me. 
I'm lost.