Prevent or stop the attack without signature or signature disabled

Hi IPS Expert,.

Our IPS is always set as based signature and anomaly detection is not enabled.

Is there a guideline that you can recommend to stop/prevent the attack without signature or signature is disabled.

I understand that if the signature is not enabled, it will also create event or alert.

This means that we will not have any idea when to stop.

Kind regards

Jhun

Jhun-

There are several reasons for which a signature can be disabled by default, but usually they are not active for a good reason.

Signatures have a natural life span, they are created, tuned to detect variants of the vulnerability / initial attack. Later in their lives, once that vulnerability has been mostly fixed or patched, they can be disabled. Once they become rather old to have little use for all they retired.

Other reasons a signature can be disabled, but that signature translates into a high rate of false positives. If you have someone perform analysis on the events that generates your IPS, you will waste their time and their talent with no productive events. It is the most common reason that a signature is disabled in an active sensor.

The last reason, maybe you want a signature (or a family of signatures) disabled, it is that they do not violate security policy you. If your organization allows peer-to-peer file sharing they that you wouldn't need signatures to stop this activity.

-Bob

Tags: Cisco Security

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