Applying iRule to ASM policy - file upload form protection

First, go to Local Traffic >> Virtual Server List and click the VS that you would like to apply the iRule to. Then go the Resources tab of that VS, and add your iRule to the Enabled panel. That will add the iRule as a resource to the VS. The next step is to enable iRule processing on the application security policy. Go to the Properties page of your security policy, and select the Advanced menu option. This will reveal the "Trigger ASM iRule Events" option toward the bottom of the screen. Enable the option, click Save and then Apply Policy.