Exclude ELMAH 404 errors reporting

                 
                                 Recently we have faced a situation that receiving lots of 404 errors for a xx\xx path not found due to vulnerabilities scan software run against our web application. Since these errors raised by vulnerabilities scan software , we no need to concern and not required to log . So we decided to stop ELMAH reporting this error.

 I have done some analysis to find the best way to exclude these types of errors from being reporting. Here is the working solution I made with simple configuration changes in the  <elmah> section of web.config as specified below