What do personal firewalls do?
Personal firewalls keep constant watch over your computer. They set up a checkpoint at every point of entry, and when traffic attempts to pass through, they inspect it. They grant access only when they’re satisfied with the result. Powerful firewalls like Norton Internet Security also cloak your computer and its ports to frustrate port scanning techniques. They identify and block known Trojan horses and malicious Web scripts. They monitor all outgoing traffic, alerting you when an unauthorized program attempts to access the Internet from your computer. Simply put, personal firewalls automatically identify and block undesirable and dangerous Internet traffic.
