What is stateful inspection and how does it enhance firewall security?

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What is stateful inspection and how does it enhance firewall security?

Stateful inspection is a firewall technology that examines the context and state of network connections. It keeps track of the ongoing sessions and inspects the data packets to ensure they are part of a legitimate and established connection. This enhances firewall security by allowing the firewall to make more informed decisions about which packets to allow or block based on the connection's state. It prevents unauthorized access by only allowing packets that are part of a valid session, thereby reducing the risk of various network attacks such as spoofing, session hijacking, and unauthorized access.