Stateful Inspection™. FireWall-1™ intercepts packets at the network layer, then extracts relevant state information from all communication layers to verify compliance with the security policy.
Unlike other security solutions, FireWall-1's Stateful Inspection architecture intercepts, analyzes, and takes action on all communications before they enter the operating system of the gateway machine, ensuring the full security and integrity of the network and the gateway itself. The state information together with network configuration and security rules are used to generate an appropriate action, such as accepting, rejecting, authenticating or encrypting the communication. Any traffic not explicitly allowed by the security rules is dropped by default and real-time security alerts and logs are generated, providing the system manager with complete network status.

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