Most organizations used category filters. You can block categories of website using a checkbox option in the WebTitan UI. You may wish to supplement this with keyword filtering. You can blacklist certain keywords, so that if they are present in the URL or on the page, the content will be blocked. The third way of filtering Internet content is using blacklists and whitelists. Blacklists are often used to block known malicious URLs and illegal content. Whitelisting ensures a site or URL can always be accessed, even if it contravenes filtering policies.