The Belgian Anti-Phishing Shield (BAPS) is a Centre for Cyber Security Belgium (CCB) initiative to warn internet users about dangerous websites.
BAPS protection means that warnings about malicious websites can be issued at Belgian DNS level.
Whenever a user clicks on a link, a DNS request is sent to the Internet Service Provider (ISP). As a result of BAPS protection, the ISP's DNS server compares the website the user is trying to access with a list of malicious websites. If the website is on that list, the ISP's DNS server will redirect the user to a warning page.