I'm currently trying to configure apache 2 to handle subdomains. This is on a local machine (not tied to any domain names) and I'm only doing it to research how the final structure of a site 'could' be setup.

Basically I have a single install of Apache 2 running. The outcome eventually should be to have specific sub domains that all point to the same document root as the actual domain name. So eventually I will have:

http://www.mydomain.com
http://subdomain1.mydomain.com
http://subdomain2.mydomain.com

with both subdomains showing the content at mydomain.com (there is reasoning behind this but I'm not gonna go into that).

I have apache setup as follows:

NameVirtualHost *:80

<VirtualHost *:80>
ServerName daneastley
DocumentRoot "C:/Program Files/Apache Group/Apache2/htdocs"
</VirtualHost>


<VirtualHost *:80>
ServerName subdomain1.daneastley
DocumentRoot "C:/Program Files/Apache Group/Apache2/htdocs"
</VirtualHost>

<VirtualHost *:80>
ServerName subdomain2.daneastley
DocumentRoot "C:/Program Files/Apache Group/Apache2/htdocs"
</VirtualHost>

Now on my local machine, only the top one works - the subdomains dont. if I add the following into my hosts file in windows, they all work:
127.0.0.1 daneastley
127.0.0.1 subdomain1.daneastley
127.0.0.1 subdomain2.daneastley

the problem being, that I wish to test this enviroment on the local network. How would I go about having every computer being able to access this? I'm assuming it comes down to DNS stuff.

any ideas?