Along with the boom in the use of computer networks in the modern world, while continuing increase access to services and the Internet, there is a problem with safety nets. To protect the data stored on computers linked in a corporate network, Server is always equipped with adequate security. The most common solution in this field are called. firewalls.

Firewalls, also known as network firewalls, to specialized equipment or software, whose job is to protect corporate networks from intruders. Since its performance depends on the security of the data collected at the company's hard drives, and for this reason firewalls are considered to be one of the most important elements of any computer network.

Features complete its dam monitoring traffic to and from a specific network, and within it. In addition, the firewall interprets - according to pre-established rules - each event and, depending on the said rule, blocking them, if it considers them to be ineligible, or permits for them, if it is consistent with the previously assigned to the norm. Any operation or action is recorded in the log (log), available from your network administrator.

In serwerowniach - as already mentioned at the outset - usually the firewall in the form of hardware, but not as a separate, specialized equipment, but as an additional module (mostly already pre-installed) to another network device. The most commonly used solution is to combine a firewall combined with a router.