Topic starter
23/06/2026 7:03 pm
TL;DR: DNS reliability determines whether digital services stay reachable, fast, and resilient, according to DigiCert, because provider infrastructure, redundancy, and DDoS protection directly shape outage exposure and user experience. For identity and access teams, DNS is part of the availability trust chain, not a background network detail.
Editorial analysis by NHI Mgmt Group, based on content published by DigiCert: “Top DNS Servers 2022”.
By the numbers:
- The average cost of downtime for the average business is $5,600 per minute or $300,000 per hour.
- A one-second delay in page load times can lead to a 7% reduction in conversions.
- Almost 70% of consumers' online buying decisions were greatly affected by website speeds, according to a recent study cited by DigiCert.
Key questions
Q: How do teams judge whether DNS resilience is adequate for identity services?
A: Teams should test whether authentication, certificate, and API flows remain available when resolution is delayed, degraded, or partially unreachable.
Q: Why does DNS downtime create a business risk even when the application itself is healthy?
A: DNS downtime can block users and systems from finding an otherwise healthy application, so the service becomes unreachable before the application layer even has a chance to respond.
Q: What breaks when DNS redundancy is weak?
A: Weak DNS redundancy means an outage, routing problem, or traffic surge can affect the entire access path instead of a single node.
Practitioner guidance
- Map DNS into critical service dependency reviews Document which identity portals, customer applications, workload endpoints, and federation paths depend on each DNS provider so outages can be evaluated by business impact rather than by network metrics alone.
- Test secondary DNS failover paths Validate that authoritative zones can still resolve when the primary provider or region is unavailable, and confirm that failover time meets the recovery expectations for business-critical services.
- Set resilience requirements for DNS suppliers Require evidence of distributed infrastructure, meaningful peering depth, and DDoS tolerance before accepting a DNS provider for externally exposed services.
Bottom line: DNS reliability is a governance issue because the resolution layer can determine whether digital services are reachable at all.
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25/06/2026 2:51 am
DNS reliability is now an identity governance dependency, not a network side issue. Modern identity programmes assume that users, workloads, and service integrations can reach the systems that resolve and route them. When DNS becomes unstable, the governance question shifts from access control to service reachability, because an authorised identity cannot use what it cannot resolve. Practitioners should treat DNS as part of the availability layer that identity depends on.
A few things that frame the scale:
- Only 5.7% of organisations have full visibility into their service accounts, according to the Ultimate Guide to NHIs.
A question worth separating out:
Q: What should security teams include in DNS supplier due diligence?
A: Security teams should look for network diversity, DDoS tolerance, operational history, secondary DNS support, and clear outage handling. They should also ask whether the provider's architecture can preserve resolution under stress, because availability is part of trust. If the provider cannot show resilience, the organisation inherits avoidable dependency risk.
👉 Read our full editorial: DNS infrastructure reliability is a governance issue for digital services