Sourcefire RNA is a passive sensing technology that provides real-time network intelligence to the vendor's Sourcefire 3D System. Specifically, it offers the following capabilities:

- Impact Flag Assessments: Threat intelligence is automatically correlated against real-time target host intelligence to determine the relevance and impact of the attack

- RNA-Recommended Rules: Sourcefire RNA recommends which Snort rules to enable and disable based on the network it is protecting. Snort rules can be enabled and disabled with or without human intervention

- Adaptive Traffic Profiling: Enables the IPS to model segmented and fragmented traffic in the same manner the host OS would see it

- Non-Standard Port Handling: If a non-standard port is detected, the applicable Snort rules will automatically be re-configured to monitor related traffic using both standard and non-standard ports

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