Firewall or wall - fire is a system or device that allows network traffic that is considered safe to pass through and prevent network traffic that is not safe. Generally, a wall - fire applied in a dedicated machine, running on the gateway ( gateway ) between the local network and other networks. Wall - fire is generally also used to control access to anyone who has access to a private network from outside parties. Today, the term firewall is a common term that refers to systems that regulate communication between two different networks. Given the many companies currently have access to the Internet and also of course incorporated in it a network, the protection of digital capital of the company from attack by hackers, or other data thieves, into nature.
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