Subject to warrants requested by the prosecutor all Belgian Internet providers have been filtering several websites at the DNS level since April 2009. This may be done when the websites are engaged in illegal activities or when they display information that is "contrary to public order or morality". People who browse the Internet using one of these providers and hit a blocked website are redirected to a page that claims that the content of the website is illegal under Belgian law and therefore blocked. In contrast to other countries, the Web sites were filtered not because of displaying pornographic content but in order to guarantee the privacy rights of suspects or criminals who committed sexual offenses against children and whose identity was accordingly revealed in the targeted Web sites.