Cent OS: dynamically configured virtual hosts

The module mod_vhost_alias creates dynamically configured virtual hosts, by allowing the IP address and/or the Host: header of the HTTP request to be used as part of the pathname to determine what files to serve. This allows for easy use of a huge number of virtual hosts with similar configurations. In this example test.server1.com will resolve to /var/www/test

vim /etc/httpd/conf/httpd.conf
Uncomment: NameVirtualHost *:80
Add: UseCanonicalName Off
<VirtualHost *:80>
  ServerAlias *.server1.com
  VirtualDocumentRoot /var/www/%-3
  <Directory /var/www/%-3>
    Order allow,deny
    Allow from all
    Options Indexes FollowSymLinks MultiViews
    AllowOverride All
service httpd restart

Note: if you are running drupal: in your drupal .htaccess, uncomment the line that says # RewriteBase / so it says instead: RewriteBase /

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