You can use URL filtering to filter which Web content is accessible to users based on a set of criteria or template. Blocklisted URLs are maintained in a URL database file. These URLs are resolved by the URL filtering process (url-filterd) on the Routing Engine to a list of IP addresses that are downloaded to the URL Filter Plugin (jservices-urlf), which is added to the Multiservices PIC management process (mspmand) running on the service PIC.