In this firewall vs. antivirus comparison, grab a quick summary of what they do, their key differences, and when to use ...

A firewall technology that ensures that all inbound packets are the result of an outbound request. Also called "stateful packet inspection" (SPI), it was designed to prevent harmful or unrequested ...

The firewall built into Windows starting with Windows XP Service Pack 2. Windows Firewall provides a stateful inspection of packets that accepts only responses to requests originated by the user.

The Kerio WinRoute Firewall performs stateful packet inspection and protocol inspection on all outgoing and incoming traffic. Security is rules-based and governs the configuration of packet ...