A firewall is piece of hardware or software which functions in a networked environment to prevent some communications forbidden by the security policy, analogous to the function of firewalls in building construction. It has the basic task of controlling traffic between different zones of trust.
Software Firewalls versus Wormhole Tunnels Hardware and software firewalls promise to protect your system and your network from the dangers of the Internet, but how well do they really fare against cutting-edge attacks? This article presents some of the major differences between hardware and software firewalls and illustrates the real challenges faced by software firewall vendors.
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