Subdomain vhost_alias
* A <ip addr>
<VirtualHost *:80>
ServerAdmin youremail@domain.com
ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
<Directory /path/to/web/dir>
Options FollowSymLinks MultiViews
AllowOverride All
</Directory>
UseCanonicalName Off
VirtualDocumentRoot /path/to/web/dir/%1
</VirtualHost>
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteBase /
<rewrite rules here>
</IfModule>