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THE_BLUE's avatar
THE_BLUE
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Oct 11, 2021
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Attack Signature False Positive Mode

There is an option under learning and blocking settings for : Attack Signature False Positive Mode   Note: If a signature false-positive is allowed this signature will not block the request.   ...
  • Erik_Novak's avatar
    Oct 14, 2021

    Yes, it means F5 Advanced WAF will create the pattern and detect false positive attack signature violations based on traffic similarity. Numerous common requests are most likely benign. Requests similar to the majority of requests are most likely benign. When you enable "Potential False Positive Detection" the system will automatically develop multiple request similarity tests, and requests which pass the tests are considered safe. Real attack attempts almost always contain outliers such as strings or meta characters which are dissimilar to most traffic. These are detected and blocked if the signature is enforced. There's a lot of math going on behind the scenes.