Secure64 LineGuard delivers a full spectrum of DNS-layer protection and policy control designed to meet the real-world demands of ISPs, enterprises, governments, and mission-critical infrastructure operators. Powered by AI, it rapidly identifies new and emerging threats, continuously updating its 500+ advanced filtering options to stay ahead of evolving risks. Every feature is purpose-built to outperform legacy filtering solutions while providing superior flexibility, robust security, and exceptional cost efficiency.
Secure64 LineGuard delivers unmatched granularity in content filtering, allowing organizations to exercise precise control over what users can access online. Administrators can block a wide range of content categories including adult material, gambling, gaming, streaming services, social media, VPNs and proxies, hate speech, violence, and more based on organizational needs and compliance requirements. With pre-configured policies designed for rapid deployment, LineGuard supports tailored filtering across diverse user groups such as children, teens, adults, and employees, ensuring both safety and productivity.
Secure64 LineGuard applies DNS filtering policies directly using EDNS client subnet data and source IP within the same DNS server, eliminating the need for additional infrastructure or complex policy routing. This streamlined approach enables accurate policy enforcement even across dynamic and distributed networks, making it ideal for ISP-scale and multi-site enterprise deployments. With built-in support for dynamic DNS (DDNS), LineGuard ensures flexible and responsive protection across constantly changing environments.
Secure64 LineGuard delivers real-time protection against a broad spectrum of threats, including malware, phishing, ransomware, botnets, crypto-mining, scams, fraud, and command-and-control (C2) attacks. Actively blocking over 100 million threats daily across live deployments, LineGuard combines AI-powered threat intelligence with expertly curated domain lists to deliver maximum accuracy and effectiveness. This dual-layered approach ensures organizations stay ahead of emerging threats with precision and speed.
Secure64 LineGuard offers complete API access to every function, including policy management, reporting, provisioning, and troubleshooting, enabling full automation and deep integration within existing IT ecosystems. Organizations can seamlessly connect LineGuard with customer portals, support tools, provisioning systems, and analytics platforms to streamline operations. This allows for efficient automation of user onboarding, policy updates, and reporting workflows, reducing administrative overhead and enhancing responsiveness to security and compliance needs.
Secure64 LineGuard is engineered to operate at ISP scale, supporting millions of active subscribers with high-performance DNS-layer security. Capable of processing over 5.8 billion DNS queries per day with full redundancy, LineGuard ensures uninterrupted service and robust threat protection even under massive loads. Its multi-tenant architecture is purpose-built for large-scale, multi-customer environments, enabling efficient policy management and security enforcement across diverse user bases.
Secure64 LineGuard delivers industry-leading DNS performance, with an average query response time of just 12.72 milliseconds according to DNSPerf global rankings. This ultra-fast resolution enhances the user experience by enabling quicker website loads, reduced buffering, and smoother online interactions. With all DNS processing handled in-network, LineGuard ensures consistently optimal performance for every customer, regardless of scale or location.
Secure64 LineGuard offers flexible deployment options to meet diverse operational needs. Organizations can deploy fully in-network to maximize privacy and achieve the lowest possible latency, while service providers can opt for cloud-based rollouts for speed and scalability. A hybrid model is also available, allowing policy management to reside in the cloud while enforcement remains on-premises, combining control with convenience. LineGuard supports global deployments with built-in geographic redundancy and failover, ensuring resilience, availability, and consistent protection across all regions.
Secure64 LineGuard enables a seamless and efficient transition from Cisco Umbrella by supporting direct import of existing policies, minimizing risk and accelerating deployment. Organizations benefit from the guidance of dedicated Customer Success Managers who oversee every stage of the migration process. This fully tested and scalable approach has already proven its effectiveness, successfully migrating 6 million users in just six weeks.
Secure64 LineGuard features an intuitive graphical user interface (GUI) that enables administrators to easily manage DNS security policies and monitor system status in real time. Automated, scheduled reports can be delivered via email to streamline compliance efforts, while customizable dashboards provide clear visibility into DNS activity, threat trends, and policy effectiveness. Full audit trails for all policy changes ensure transparency and accountability, supporting both operational oversight and regulatory compliance.
Secure64 LineGuard is entirely developed, supported, and maintained in the United States, ensuring trusted, secure software built to meet national standards. Every deployment includes full lifecycle support, with a dedicated Customer Success Manager to guide onboarding and long-term success. For mission-critical environments, 24/7 technical support is available, and unlike typical support models, many calls are answered directly by a product engineer who can immediately diagnose and resolve issues without delay.
Secure64 LineGuard is not just a filtering tool—it is a complete DNS-layer security platform built for organizations that demand:
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Discover how LineGuard by Secure64 protects 6 million users, blocks 100 million threats daily, and delivers lightning-fast results after switching from Cisco Umbrella in just 6 weeks.
