====== Apache_2_Reverse_Proxying ======

This article will discuss using virtual hosts to allow multiple machines - each with their own domain name (or subdomain) - to be accessed externally on one public IP address, while remaining on port 80, by having one machine proxy requests to the rest by reading the HTTP <code>Host:</code> request header.

===== Ubuntu =====
==== Installation ====
 a2enmod proxy
 a2enmod proxy_http

==== Basic Configuration File ====
I recommend creating a new "site" (i.e. a file in /etc/apache2/sites-available/) for each machine that will be proxied.  This seems to be the new Ubuntu/Debian way of configuring Apache.  So start by creating and editing a new file, e.g. /etc/apache2/sites-available/foo
NameVirtualHost modsec.atuin.lorddeath.net
<VirtualHost modsec.atuin.lorddeath.net>
        ServerName modsec.atuin.lorddeath.net

        ErrorLog /var/log/apache2/error.atuinmodsec.log
        # Possible values include: debug, info, notice, warn, error, crit,
        # alert, emerg.
        LogLevel warn
        CustomLog /var/log/apache2/access.atuinmodsec.log combined
        ServerSignature On

        ProxyRequests Off
        ProxyPass / http://atuinmodsec/
        ProxyPassReverse / http://atuinmodsec/

        <Proxy *>
                Order deny,allow
                Allow from all
        </Proxy>
</VirtualHost>

==== Things To Note ====
  * On Ubuntu/Debian, there will