Managed DNS security and uptime: what IAM teams should consider

TL;DR: Managed DNS can improve website performance with load balancing, preserve availability through secondary DNS and failover, and strengthen DNS security with DNSSEC, according to DigiCert. The governance lesson is that DNS reliability and integrity are now part of broader identity and trust control design, not just network operations.

NHIMG editorial — based on content published by DigiCert: Best Managed DNS for San Jose, California

By the numbers:

• Studies have shown that a one-second delay in website loading time can result in a 7% reduction in conversions.
• When AWS credentials are exposed publicly, attackers attempt access within an average of 17 minutes and as quickly as 9 minutes in some cases.

Questions worth separating out

Q: How should security teams reduce the impact of DNS hijacking on identity and access paths?

A: Security teams should protect the DNS records that support sign-in, API access, and certificate validation first, because those zones carry the highest trust value.

Q: When does managed DNS become part of identity governance rather than network operations?

A: Managed DNS becomes an identity governance issue when it directly affects how users, workloads, and services reach trusted endpoints.

Q: What breaks when DNS integrity controls are missing?

A: When DNS integrity controls are missing, attackers can redirect traffic, intercept users, or disrupt service without changing the application itself.

Practitioner guidance

• Map DNS dependencies across identity and service flows Identify which login pages, API endpoints, certificate checks, and internal services rely on each authoritative DNS zone so outages do not surprise the identity team.
• Enable DNSSEC on trust-anchor domains Prioritise domains that support authentication, certificate validation, and customer access journeys.
• Test secondary DNS and failover paths under failure conditions Simulate primary DNS loss, regional interruption, and record corruption to confirm that alternate resolution behaves as intended and does not create stale or inconsistent answers.

What's in the full article

DigiCert's full blog covers the operational detail this post intentionally leaves for the source:

• Specific managed DNS configuration patterns for load balancing and failover across production domains
• Product-level guidance on DNSSEC setup and zone protection workflows for administrators
• Operational positioning for DigiCert DNS Trust Manager in relation to availability and trust controls

👉 Read DigiCert's blog on managed DNS security and performance for San Jose businesses →

Managed DNS security and uptime: what IAM teams should consider?

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