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23/06/2026 7:04 pm
TL;DR: Managed DNS is framed as a way for London organisations to improve website performance, DNS security and high availability, with the article citing a one-second page-load delay as capable of reducing conversions by 7% according to DigiCert. The underlying message is that DNS governance now sits at the intersection of user experience, attack resilience and service continuity, not just infrastructure housekeeping.
NHIMG editorial — based on content published by DigiCert: Driving Digital Excellence in London with Managed DNS
By the numbers:
- A one-second delay in website loading time can result in a 7% reduction in conversions.
Questions worth separating out
Q: How should security teams govern DNS for identity-critical services?
A: Security teams should treat DNS as part of the access path and apply the same governance discipline used for certificates, federation and workload identities.
Q: Why does DNS security matter to IAM programmes?
A: DNS security matters because users and workloads must reach the right endpoint before authentication, certificate validation or API trust can work.
Q: What breaks when DNS failover is not tested regularly?
A: When failover is not tested, organisations can discover during an outage that secondary DNS serves stale records, missing entries or inconsistent responses.
Practitioner guidance
- Classify DNS as an identity dependency Document which authentication portals, certificate services, APIs and workload endpoints depend on each critical domain or subdomain.
- Enable DNSSEC on identity-critical zones Sign public zones that support login, federation, certificate validation or workload connectivity, and alert on validation failures.
- Test failover for access-path services Run continuity tests for primary and secondary DNS on the domains that serve customer access, SSO flows and machine-to-machine integrations.
What's in the full article
DigiCert's full blog post covers the operational detail this post intentionally leaves for the source:
- How managed DNS architecture supports load balancing, CDN integration and intelligent routing across production environments.
- Why DNSSEC is positioned to protect against DNS hijacking and unauthorized record modification in real deployments.
- How secondary DNS and failover reduce the impact of server failures or network disruptions on service access.
- The article's London-specific business framing for performance, security and high availability in a competitive market.
👉 Read DigiCert's article on managed DNS for performance, security and high availability →
Managed DNS in London: are your performance and failover controls ready?
Explore further
25/06/2026 2:52 am
Managed DNS is a trust-control problem as much as an availability problem. The article correctly connects DNS to performance and continuity, but the deeper issue is that DNS is part of the trust chain for every user and workload that must reach an authenticated endpoint. If the lookup layer is unstable or tampered with, identity and access controls can be bypassed before they are even exercised. Practitioners should treat DNS governance as part of the access path, not a separate infrastructure afterthought.
A few things that frame the scale:
- The average estimated time to remediate a leaked secret is 27 days, despite 75% of organisations expressing strong confidence in their secrets management capabilities, according to The State of Secrets in AppSec.
- Only 44% of developers are reported to follow security best practices for secrets management, exposing a significant developer behaviour gap.
A question worth separating out:
Q: How do teams know whether DNS governance is actually working?
A: Teams know DNS governance is working when critical records are signed, changes are attributable, failover preserves intended destinations and identity-dependent services stay reachable during disruption. The clearest signal is that DNS incidents do not cascade into login failure, certificate errors or service discovery breakdowns.
👉 Read our full editorial: Managed DNS in London: why performance, security and uptime matter
