[Reference: https://community.fortinet.com/t5/Support-Forum/Proxy-based-vs-Flow-based-Inspection-Mode-for-Web-Filter/m-p/19204, , , Flow-based inspection is a type of traffic inspection that is used by some firewall devices, including FortiGate, to analyze network traffic. It is designed to be more efficient and less resource-intensive than proxy-based inspection, and it offers several benefits over this approach., , Two benefits of flow-based inspection compared to proxy-based inspection are:, , FortiGate uses fewer resources: Flow-based inspection uses fewer resources than proxy-based inspection, which can help to improve the performance of the firewall device and reduce the impact on overall system performance., , FortiGate adds less latency to traffic: Flow-based inspection adds less latency to traffic than proxy-based inspection, which can be important for real-time applications or other types of traffic that require low latency., , , ]
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