Circumventing an IPS/IDS
An attacker has an objective, and it is likely that he does not want to be stopped or seen. So, if you have IPS/IDS in place, an attacker may try to evade detection of his activities by the IPS/IDS. Table 17-6 describes evasion methods an attacker may try to use and Cisco options to counter these evasion techniques.
Table 17-6 IPS/IDS Evasion Techniques
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