Zscaler DNS Security review
A focused DNS security service for enterprises needing threat analytics and policy control.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Zscaler DNS Security is a cloud-delivered DNS protection service for organizations securing users, IoT and OT devices, and cloud workloads. It filters risky and malicious domains, supports malware blocking and adult content filtering, and records DNS activity for investigation. Enterprises that need centralized DNS policy enforcement across locations and protocols are the clearest fit, particularly when DNS threat analytics is a primary requirement.
Its strongest area is visibility around DNS activity and threats. DNS tunneling detection and prevention, DNS over HTTPS inspection, context-rich DNS transaction logs, and DNS Insights logs and dashboards give security teams several ways to investigate and manage DNS behavior. Granular filtering rules support more specific policy control, while trusted DNS resolution and automatic DNS failover address continuity and error handling. The service also operates within Zscaler’s Zero Trust Exchange and Zero Trust Firewall offerings, making its platform context relevant for organizations already considering those products.
Pricing is handled through contact with sales rather than a published numeric price for this service. Zscaler presents DNS Security as part of broader platform and Zero Trust Firewall offerings, but the listed platform is web-based and integrations are not specified here. Support availability varies by support tier, with premium tiers providing 24x7x365 support. Choose Zscaler DNS Security when DNS-layer protection, tunneling detection, DoH inspection, and centralized analytics matter most. Organizations seeking a separately priced DNS service with a clearly defined integration catalog may prefer an alternative.
Zscaler DNS Security pros and cons
- Where it wins
- Detects DNS tunneling and inspects DNS over HTTPS traffic
- Provides granular rules, activity logs, and DNS Insights dashboards
- Includes automatic DNS failover and configurable error handling
- Where it doesn't
- Pricing requires contacting sales
- The listed platform is web-based
- Support availability varies by support tier
Zscaler DNS Security fact sheet, pricing and score →
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