Security Wizardry - Network Tap Information

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Network Tap Information
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Some Tap Terminology

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Fail-closed: the IDS Taps have proprietary circuitry pre-process that closes the circuit when power fails, maintaining the network link, Fail-open: where it is essential that all traffic is monitored some organisations prefer the Taps to fail-open, this is more usual for Intrusion Prevention Systems than Intrusion Detection Systems. MORE
Traffic Aggregation: the IDS Taps aggregate full-duplex traffic into a single stream so that a stateful intrusion detection system, can see both sides of the conversation and therefore provide the lowest incidence of false positives. Some Taps present dual outputs to combine the traffic externally, others combine the traffic internally presenting a single full duplex output.
Reset Injection: some IDS Taps allow the IDS to transparently inject TCP Resets into the stream, terminating offending sessions. MORE
Passive vs. Active: MORE

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