![]() An even more careful option would separate the web, email, and FTP servers from one another with further firewalls. The benefit of such a configuration is that the host that need to be accessible form the internet - and are therefore most at risk from outside attack - can only do limited damage to the internal hosts that do not need to be reachable from the internet. Demilitarized Zone (DMZ) - A DMZ is a form of network architecture in which a network enclave is dedicated to services that should be somewhat accessible from the outside. The firewall serves as a user's proxy to access the database on behalf of the outside user but limits the information returned from the query. Thus, each time the system is ready to display a product's page, the firewall queries the database and, according to the result obtained, adds a line saying "available now," "a few left" or "out of stock" The company maintains a protected database of products, including stock on hand, but the company does not want to release exactly how many units of a product are on hand. ![]() ![]() Example Firewall configs - A company has an internal web structure, with pages describing products, customers, and perhaps internal contact information.
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