1. Centros de Desintoxicación 10, Grupo Dropalia, Alicante, Spain 2. Company 3. http://www.centrodedesintoxicacion10.com/ 4. We use Debian as our firewall, proxy and as our DNS.We chose the Debian operating system because it is extremely stable and perfectly scalable. Besides that, we chose it because of its robustness, security and the low cost for the company.