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Portallion_1480's avatar
Portallion_1480
Icon for Nimbostratus rankNimbostratus
Sep 11, 2017

Issue Getting JSON Response Page to Present on ASM Block

Running 12.1.2 HF1 - ASM is configured to present a block response page when illegal requests are detected for a web application. I verified in the logs that illegal requests are being detected and d...
application delivery
ASM Advanced WAF
iRules
Hoang_Hung's avatar
Hoang_Hung
Icon for Cirrus rankCirrus
Nov 16, 2020

Hi  

I had same your error !

At this time, Do you know solution for issue?

 

Thanks

Hung Hoang

  • Simon_Blakely's avatar
    Simon_Blakely
    Icon for Employee rankEmployee
    Nov 16, 2020

    Again - if your application is using Ajax and JSON, you need to look at the framework itself to find out what options you have for inserting ASM response reporting into the application flow.

    I would have a discussion with the application developer to see how ASM can report errors back to the client in a user friendly way.

    • Hoang_Hung's avatar
      Hoang_Hung
      Icon for Cirrus rankCirrus
      Nov 16, 2020

      Hi  

      Did you not still search solution for issue!

      I had used your irule previous message. But it cant still display blocking request to my customer !

  • Ivan_Chernenkii's avatar
    Ivan_Chernenkii
    Icon for Employee rankEmployee
    Nov 17, 2020

    Hello Hoang,

     

    Do you see this issue for AJAX requests?

    If YES, then to correctly block AJAX requests you need to enable "AJAX Blocking Behavior (JavaScript Injection)" in your policy.

     

    Thanks, Ivan

    • Hoang_Hung's avatar
      Hoang_Hung
      Icon for Cirrus rankCirrus
      Nov 17, 2020

      Hi  

      Thanks you for response

      when we enbled AJAX response policy after we sent block page

      But when enable AJAX, Captcha can't reload. So we need disable AJAX.

      Do you know why it had error ?.

      Befor we have enable CSRF ( CSRF will javaScript Injection) >> same error when we enable AJAX.

      Thanks

      Hung Hoang

    • Ivan_Chernenkii's avatar
      Ivan_Chernenkii
      Icon for Employee rankEmployee
      Nov 17, 2020

      If AJAX requests are used in your application, then most probably this is single page application. If this is so, then you need to set single_page_application system variable on "Security ›› Options : Application Security : Advanced Configuration : System Variables" page to 1 - it should make java script functionality work correctly with AJAX