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cybersecurityidsintrusion-detection-systemintrusion-prevention-systemipsnetwork-monitornetwork-monitoringnsmsecuritysuricatathreat-hunting
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ba9d43cce5
The idea is: if mpm is negated, it's both on mpm and nonmpm sid lists and we can kick it out in that case during the merge sort. It only works for patterns that are 'independent'. This means that the rule doesn't need to only match if the negated mpm pattern is limited to the first 10 bytes for example. Or more generally, an negated mpm pattern that has depth, offset, distance or within settings can't be handled this way. These patterns are not added to the mpm at all, but just to to non-mpm list. This makes sense as they will *always* need manual inspection. Similarly, a pattern that is 'chopped' always needs validation. This is because in this case we only inspect a part of the final pattern. |
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