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IPS protection "TCP Off-Path Sequence Inference" drops TCP "RST" packets with "ACK" value 0
Symptoms
  • SmartView Tracker logs show that IPS protection "TCP Off-Path Sequence Inference" drops TCP "RST" packets:

    Blade: IPS
    Action: Drop
    Attack Name: Streaming Engine: TCP off-path sequence inference
    Attack Information: TCP off-path sequence inference.
    Protection Name: TCP off-path sequence inference
    Protection ID: tcp_off_path_enable
    
  • SecureXL status (enabled / disabled) is not relevant.

Solution
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