A device or application for protecting a network or host against hostile network traffic.
A piece of software (or a combination of hardware and software) that isolates an intranet from the Internet, allowing only trusted traffic to travel between them.
A combination of hardware and software that separates a Network into two or more parts for security purposes.
A security system intended to protect an organization’s network against external threats, such as hackers, coming from another network, such as the Internet. Usually a combination of hardware and software, a firewall prevents computers in the organization’s network from communicating directly with computers external to the network and vice versa. Instead, all communication is routed through a proxy server outside of the organization’s network, and the proxy server decides whether it is safe to let a particular message or file pass through to the organization’s network. See also proxy server.
Bedem, zaštitna softverska zapreka koja onemogućava ostalim korisnicima Interneta da pristupaju osetljivim delovima vašeg računara. Reč "bedem" možda je malo preterana, ali ona naglašava važnost uređaja.