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karthicksankark's avatar
karthicksankark
Icon for Altostratus rankAltostratus
Jun 08, 2023

No Learning Suggestions But could see Violations in the event logs

Hi All,  In our environment we are in process of implementing the ASM policies. For few Policies we are not seeing any learning suggestions. But there are legal and illegal requests but no learning ...
ASM Learning Suggestions
security
  • Mohamed_Ahmed_Kansoh's avatar
    Mohamed_Ahmed_Kansoh
    Jun 08, 2023

    Hi karthicksankark , 

    >>> your Q : The Enforcement Readiness Period is 7 days. After 7 days ony I started looking into the learning suggestions will that be a cause. if so how can i see the current suggestions. ? 

    Answer : No , you should see suggestions, and let me explain. 

    First what is the Learning mode that you're using in each Entity ( Entity means >> File types , parameters , URLs ) Learn mode contains ( Never ( Wildcard only ) , selective , Always , and Compact ). 

    If you want to learn everything in your AWAF , you need to modify it to Always , to see suggestion from each request. and make sure you enable ( Learn Check box ) for each entity.

    Also Make sure to enable learn check box in ( Evasion Technique , http compliance and attack signatures ) 

    Till here I answered your Questions of how to get suggestions. 

    For more info about learning modes , Refer to this Article : 
    https://techdocs.f5.com/en-us/bigip-14-1-0/big-ip-asm-implementations-14-1-0/refining-security-policies-with-learning.html
    Specially this part : 


    Also Listen to this Video : 
    https://www.youtube.com/watch?v=6Qi6kX6iyJ0

    After that let me know , if you need anything. 

    I hope that helps you , GoodLuck 🙂 

Mohamed_Salah_'s avatar
Mohamed_Salah_
Icon for MVP rankMVP

Hello,

since you are using automatic learning mode, that's means when F5 generates a learning suggestion and its score reaches 100%, F5 will automatically accept this suggestion without waiting for your interception. you can check the policy history to check the changes that are made.

Also, there are some violations that are triggered as illegal requests in the event logs but F5 doesn't generate suggestions for them, you can check the below link for this point:

https://my.f5.com/manage/s/article/K17191923

last point, inside the policy building settings (learning and blocking settings), you can change the mode to advanced for "policy building process" and expand the options section. you will find " HTTP Response Status Codes used to learn traffic" and the default values are 1xx 2xx and 3xx. which means F5 will learn and generate a suggestion for these responses only. you can check the response code for the requests in the event logs, and add response codes in this box accordingly to see the suggestions.

 

Thanks,

Salah

karthicksankark's avatar
karthicksankark
Icon for Altostratus rankAltostratus
Jun 12, 2023

Hi Salah, 

Thanks for the information. Yes, I changed the learning mode to Manual and verified the suggestions that are waiting for my action to accept, delete or ignore. 

Thanks Again, 

Karthick