Cloudflare named a Leader in Forrester’s Q1 2021 DDoS Mitigation Wave
Cloudflare has been named a Leader in The Forrester Wave™: DDoS Mitigation Solutions, Q1 2021. The report, authored by Forrester Senior Analyst David Holmes, specifically calls out Cloudflare’s edge network as “a compelling way to protect and deliver applications,” noting that the company “protects against DDoS from the edge, and fast.”
The recognition reflects years of sustained investment in Cloudflare’s DDoS mitigation stack. Since 2017, the company has offered unmetered DDoS protection at no cost across every plan tier, including the Free plan. The decision to make mitigation free was tied directly to the architecture of Cloudflare’s own systems, which are designed to keep mitigation cost-efficient by design.
Cloudflare’s automated detection and mitigation systems continuously inspect traffic samples asynchronously across layers 3–7 of the OSI model. When an attack is identified, the system generates a real-time, ephemeral mitigation rule and deploys it to the most appropriate location in the edge — either in the Linux kernel’s eXpress Data Path (XDP), Linux userspace iptables, or the HTTP reverse-proxy. This approach enables Cloudflare to absorb the largest volumetric attacks without degrading performance.
The attack landscape is getting worse, not better
Despite advances in mitigation, DDoS attacks continue to grow in frequency, sophistication, and geographic distribution. Cloudflare’s own quarterly network-layer DDoS reports for 2020 document the trend, and the company has mitigated some of the largest and most novel attacks on record — including a 754 million packets-per-second assault and an “acoustics-inspired” attack that required a new class of defense.
The threats are no longer purely technical, either. In Q4 2020, 17% of surveyed Cloudflare customers reported a ransom threat or demand. By Q1 2021, that figure had climbed to 26% — roughly one in four respondents. Ransom DDoS attacks target organizations with the threat of disruption, often before any packets are sent.
The clear implication: organizations need always-on, automated DDoS protection that requires no human intervention during an attack. Cloudflare’s architecture delivers mitigation in an average of under three seconds for the most sophisticated L3/L4 attacks, with pattern-based detection handled by its autonomous dosd. That system runs independently in each of Cloudflare’s data centers, eliminating reliance on any centralized mitigation hub and adding resilience to the network itself.
For patternless attacks, Cloudflare relies on flowtrackd, a TCP state classification engine built in 2020 to defend Magic Transit customers.
Visibility and control improve alongside mitigation
Mitigation technology has evolved in parallel with observability tools. In 2019, Cloudflare shipped Firewall Analytics, giving L7 customers insights into HTTP application security and DDoS activity, with the ability to configure rules directly from the analytics dashboard. A year later, Network Analytics brought equivalent visibility to L3/4 packet-level traffic for enterprise Magic Transit and Spectrum customers, including periodic Insights and Trends reporting. Real-time DDoS alerts were also introduced, as well as emailed DDoS reports. Data can also feed external SIEM dashboards for those who prefer centralized logging.
Integration beyond DDoS
Cloudflare’s top score in the strategy category of the Forrester report, along with its highest-possible ratings across 15 criteria — spanning threat detection, burst attacks, response automation, speed of implementation, product vision, and performance — reflects a design in which every service runs on every server in every data center.
That architectural choice is the foundation of Cloudflare’s integrated approach. Customers manage DDoS, WAF, CDN, bot management, and even serverless compute from a single dashboard and API. Services share a data path, so there are no extra routing hops between them — whether that’s Bot Management rules integrated into the Application Firewall, or mitigating L7 attacks at L4 for cost efficiency via the iptables-leveraging “IP Jails” mechanism.
The practical benefits cited by customers include streamlined management across fewer vendors, a single point of contact for troubleshooting, and the operational simplicity of having security and performance delivered from one provider. For those dealing with attacks in progress, Cloudflare also maintains an under-attack hotline.
