FortiCarrier Order of operations: flood checking before duplicate checking

Order of operations: flood checking before duplicate checking

Although duplicate checking involves only examination and comparison of message contents and not the sender or recipient, and flood checking involves only totaling the number of messages sent by each subscriber regardless of the message content, there are times when a selection of messages exceed both flood and duplicate thresholds.

The Carrier-enabled FortiGate unit checks for message floods before checking for duplicate messages. Flood checking is less resource-intensive and if the flood threshold invokes a Block action, the blocked messages are stopped before duplicate checking occurs. This saves both time and FortiOS Carrier system resources.

The duplicate scanner will only scan content. It will not scan headers. Content must be exactly the same. If there is any difference at all in the content, it will not be considered a duplicate.

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