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
Host:
request header.
a2enmod proxy a2enmod proxy_http
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>