I started using mod-security in my Ajax based web application. I am using jboss as my web server and apache/mod-security  is used for securing my web application in network based deployment.

When ajax calls come in to the apache server, my rules analyze the request and check input data for invalid/unacceptable texts. If the text is invalid, I want to log it , block the request and then send the user a message (response back to the client). I tried using ‘redirect’ action but it was not successful because of asynchronous mode (Ajax).


My question is .. how can I send a response back to the client after  blocking the request?  (with a  pop up message to the user with “The data you entered is not allowed. Please contact administrator” and then close the windows opened.