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Month: February 2018

IPS Evasion Techniques

IPS Evasion Techniques

Traffic Fragmentation One of the early network IPS evasion techniques used fragmentation of traffic to attempt to bypass the network IPS sensor. Fragmentation-based evasion refers to any evasion attempts where the attacker fragments the malicious traffic, hoping to avoid detection or filtering in the following ways: Bypassing the network IPS sensor if the IPS sensor does not perform any fragment reassembly Reordering the fragments, hoping the network IPS sensor does not correctly reorder the fragments Classic examples of fragmentation-based evasion…

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