Ports, Protocols, and IP Address Ranges for Firewalls

Firewalls can be configured to block data from certain locations while allowing the relevant and necessary data through (see Understanding Denial-of-Service Attacks and Understanding Hidden Threats: Rootkits and Botnets for more information). They are especially important for users who rely on "always on" connections such as cable or DSL modems. Firewall and Proxy Server HOWTO: Understanding Firewalls A firewall is a structure intended to keep a fire from spreading. Building have firewalls made of brick walls completely dividing sections of the building. In a car a firewall is the metal wall separating the engine and passenger compartments. Internet firewalls are intended to keep the flames of Internet hell out of your private LAN. Understanding Firewalls for Home and Small Office Use | CISA Jun 17, 2009 Ch.9.4 Helpdesk: Understanding Firewalls Flashcards | Quizlet

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