Recently, we've come across come.in and were wondering how they do that. So, we figured that an easy way to do that would be to use the Apache reverse-proxy module and to register subdomains for each website to proxy.

On Debian, after installing Apache, the proxy modules can be enabled with:

a2enmod proxy
a2enmod proxy_http

After that, a subdomain should be registered for every website you want to proxy. Then, you can create a virtual host with Apache, by placing a file in /etc/apache2/sites-available/ with the following contents:

k.grimore.org

<VirtualHost *:80>
        ServerAdmin mssnuggles@ted.ly
        ServerName k.grimore.org
 
        ProxyPreserveHost   Off
        ProxyPass       /   http://kickass.to/
        ProxyPassReverse       /   http://kickass.to/
</VirtualHost>