SonicWALL Content Filtering Service provides businesses and schools with greater control to transparently enforce acceptable use policies and block inappropriate and objectionable Web contentSonicWALL Content Filtering Service provides businesses and schools with greater control to transparently enforce acceptable use policies and block inappropriate and objectionable Web content. SonicWALL CFS reduces administrative overhead and extends protection by leveraging a dynamic database of millions of URLs, IP addresses and domains that is continuously updated and limitless in size. At the core of CFS is an innovative Web site caching and rating architecture that provides network administrators with greater control to automatically block entire categories of inappropriate and objectionable Web content such as porn, hate, violence, nudity and others. With the CFS caching feature, URL ratings are stored locally on the SonicWALL appliance, reducing response time to frequently-visited sites to a fraction of a second.