Comodo Secure DNS review
A no-install public DNS resolver for basic malicious-domain blocking.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Comodo Secure DNS is a free recursive DNS resolver for people and small organizations seeking an alternative to their internet service provider’s DNS service. It uses public DNS servers and requires users to configure a router or computer rather than install an application. The service is aimed at straightforward malicious-domain blocking, with support for Windows and macOS environments and cloud deployment. It is a focused resolver rather than a full authoritative DNS management platform or an enterprise DNS security suite.
Its main strength is the combination of recursive DNS resolution and malware-domain filtering. A real-time block list of harmful websites helps identify domains associated with malicious activity, while Anycast routing and redundant DNS infrastructure support the service’s network design. Comodo Secure DNS also provides nonexistent-domain search and guide pages, which can help explain certain failed lookups. The configuration model is direct: users point a router or computer to Comodo’s public DNS servers, with no installed software required.
The Free plan covers recursive DNS resolution, malware-domain filtering, and access to public DNS servers. The product remains narrow in scope, however. It does not provide authoritative DNS management for customer domains, and verified features do not include category policies, reporting, or encrypted DNS. Those looking for additional enterprise controls should consider Comodo Secure Internet Gateway, which is presented as a separate product. Comodo Secure DNS suits solo users and small organizations that want free, basic harmful-domain blocking with a configuration-based setup; organizations needing policy controls, visibility, or broader DNS administration should choose a different fit.
Comodo Secure DNS pros and cons
- Where it wins
- Free public DNS servers with no software installation required
- Malware-domain filtering uses a real-time harmful-site block list
- Anycast routing and redundant DNS infrastructure support DNS availability
- Where it doesn't
- Does not provide authoritative DNS management for customer domains
- No verified category policies, reporting, or encrypted DNS
- Configuration is limited to routers and computers
Comodo Secure DNS fact sheet, pricing and score →
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