NxFilter is a free, lightweight DNS filtering solution designed to deliver excellent performance without causing latency issues in your network. It offers advanced features such as Active Directory integration, DNS over HTTPS support, screen time management, data caps, user-level reporting, remote user filtering, and clustering. NxFilter is suitable for various environments, including commercial enterprises, nonprofits, schools, hospitals, and family protection, providing multiple filtering policies based on users and groups. The software caches DNS responses from upstream servers, reducing DNS traffic and enhancing efficiency. It supports user authentication methods, including Active Directory integration, and offers URL keyword filtering to block specific search terms in search engines. NxFilter is known for its stability, often running for months without requiring restarts, and is scalable to accommodate several thousand users.