gistfile1.txt

<VirtualHost 1.1.1.1:80>
  ServerName example.com
  ServerAlias www.example.com
  DocumentRoot /home/www/example.com/web/web/version_1

  ## Logs
  CustomLog /home/www/example.com/log/apache/access.log combined env=!no_log
  ErrorLog /home/www/example.com/log/apache/error.log
  ## / Logs

  RewriteEngine on

  ## Redirection vers www
  RewriteCond %{HTTP_HOST} ^example.com$
  RewriteRule ^(.*) http://www.example.com [QSA,L,R=301]
  ## / Redirection vers www

#  ProxyVia On
#  ProxyRequests Off
  ProxyPreserveHost on
#  <Proxy *>
#    Order deny,allow
#    Allow from all
#  </Proxy>
#  ProxyPass / http://2.2.2.2
#  ProxyPassReverse / http://2.2.2.2

  ProxyPass / http://example.com
  ProxyPassReverse / http://example.com
</VirtualHost>