With active fingerprinting the network scanner sends several packets to the target with various settings. The responses to the settings are analyzed and compared to a list of known request/response values to find a match. Operating systems are all built with identifying characteristics within their TCP/IP stacks and configurations. This includes settings such as the TCP window size and TCP initial sequence numbers. Passive fingerprinting also looks at deviations in TCP/IP stack implementations; however it looks for these deviations by analyzing the traffic on the network. Passive fingerprinting does not send any packets to the target; it passively monitors the target’s communications.
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TrendMicroDLPSSucks
Highly Voted 11 months, 3 weeks ago