Always-On Availability with DNS & DDoS Resilience
Resilience Starts at the Foundation
The Hidden Backbone of the Internet (and its Weaknesses)
Every time someone sends an email, opens an app, or types your URL into an address bar, the Domain Name System (DNS) works quietly behind the scenes to resolve names into IP addresses. But DNS wasn’t built with security or resilience as its first priority. Over time, it’s become a powerful attack surface—one that threat actors exploit through flooding, spoofing, amplification, and enumeration attacks.
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Trends & Realities:
What the Data Shows
Today’s resilience challenges are shaped by an uncomfortable truth: The majority of modern outages begin with failures in DNS or traffic steering—not with the application itself. Threat actors understand this, which is why attacks are becoming more disruptive, targeted, and automated.
Industry data paints a consistent picture:
DNS-targeted DDoS is up year over year, with adversaries favoring techniques that blend small, distributed floods with reconnaissance.
Enumeration and probing activity have grown, enabling attackers to map weaknesses before launching full campaigns.
Organizations with a single DNS architecture or a single cloud dependency experience significantly higher downtime risk during global traffic surges.
Resilience is no longer about surviving “the big attack”; it’s about ensuring uptime during thousands of small ones. Modern digital businesses need systems designed for constant pressure—not occasional events.
What True Resilience Looks Like
Here are the foundational principles and best practices organizations should adopt to strengthen DNS and DDoS resilience:
Redundancy Across Layers
UltraDNS operates independent anycast networks with true multi-plane redundancy to eliminate single points of failure.
Layered Detection & Filtering
UltraDNS integrates UltraDDoS Protect to deliver layered threat detection and geographic-based traffic filtering.
Automated Failover & Dynamic Traffic Steering
UltraDNS uses more than 50 global nodes to enable automated failover and intelligent, policy-driven traffic steering.
Massive Capacity + Global Coverage
UltraDNS processes over 200 billion DNS transactions per day and more than 4 trillion queries per month across its global platform.
Operational Readiness & Expertise
UltraDNS brings 27 years of operational experience supporting mission-critical DNS for the world’s largest organizations.
Compliance & Resilience Alignment
UltraDNS meets and exceeds major global compliance and resilience mandates for DNS reliability and availability.
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Related Resources
DDos Report
DDoS attacks remain a fast and effective way to disrupt business operations. DigiCert’s Security Operations Center reviewed six months of real-world attack data to highlight key trends and defensive insights.
Holiday Resilience Webinar
As holiday traffic and cyber threats surge, eCommerce and digital platforms must be prepared to perform under pressure. This webinar explores real-world threat trends and practical DNS and DDoS strategies to help ensure uptime during the busiest shopping periods of the year.
Multi-CDN Webinar
Delivering fast, reliable digital experiences has never been more critical—or more complex. This webinar examines why organizations are adopting multi-CDN strategies and how DNS plays a key role in optimizing performance at scale.
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