This feature lets you define filtering options for each proxy service. It helps in filtering out specified URLs from the ones audited as part of the URL Accessed audit event. These filtered out URLs are not displayed in the Audit Server. This is helpful where auditing every URL is not required and may increase the load on the Audit Server. Unnecessary URLs such as, public images, public javascripts, css, and favicons can be ignored from auditing. The option to set this feature is NAGFilteroutUrlForAudit <regular expression>. This option must be added to the Advanced options section of each service. The regular expression is standard perl based regular expressions. For more information about regular expressions, see perlre.
Each URL (path?querystring) is matched against this expression. If the match is successful, the URL will not be audited for URL access. For example, NAGFilteroutUrlForAudit ".*.jpg" and NAGFilteroutUrlForAudit ".*.gif". If these options are added to a service, all the *.jpg and *.gif files accessed will not be audited under the 'URL Accessed' audit event.
NOTE:Enable 'URL Accessed' audit events in Access Gateway can overload the Audit subsystem if the requests sent to Gateway per second is high. This might result in a delayed loading of web page. It is recommended to use the http common/extended logging option for this purpose.