Defending the Internet: how Cloudflare blocked a monumental 7.3 Tbps DDoS attack
2025-06-19
In mid-May 2025, Cloudflare blocked the largest DDoS attack ever recorded: a staggering 7.3 terabits per second (Tbps)....
Targeted by 20.5 million DDoS attacks, up 358% year-over-year: Cloudflare’s 2025 Q1 DDoS Threat Report
2025-04-27
DDoS attacks are surging. In 2025 Q1, Cloudflare blocked +20M attacks (a 358% YoY spike) along with 5.6 Tbps and 4.8 Bpps record-breaking attacks....
Cloudflare thwarts over 47 million cyberthreats against Jewish and Holocaust educational websites
2025-01-27
January 27 marks the International Holocaust Remembrance Day — a solemn occasion to honor the memory of the six million Jews who perished in the Holocaust, along with countless others who fell victim...
Record-breaking 5.6 Tbps DDoS attack and global DDoS trends for 2024 Q4
2025-01-21
2024 ended with a bang. Cloudflare mitigated another record-breaking DDoS attack peaking at 5.6 Tbps....
4.2 Tbps of bad packets and a whole lot more: Cloudflare's Q3 DDoS report
2024-10-23
The number of DDoS attacks spiked in the third quarter of 2024. Cloudflare mitigated nearly 6 million DDoS attacks, representing a 49% increase QoQ and 55% increase YoY....
How Cloudflare auto-mitigated world record 3.8 Tbps DDoS attack
2024-10-02
Over the past couple of weeks, Cloudflare's DDoS protection systems have automatically and successfully mitigated multiple hyper-volumetric L3/4 DDoS attacks exceeding 3 billion packets per second (Bpps). Our systems also automatically mitigated multiple attacks exceeding 3 terabits per second (Tbps), with the largest ones exceeding 3.65 Tbps. The scale of these attacks is unprecedented....
DDoS threat report for 2024 Q2
2024-07-09
Welcome to the 18th edition of the Cloudflare DDoS Threat Report. Released quarterly, these reports provide an in-depth analysis of the DDoS threat landscape as observed across the Cloudflare network. This edition focuses on the second quarter of 2024...
DDoS threat report for 2024 Q1
2024-04-16
2024 started with a bang. Cloudflare’s autonomous systems mitigated over 4.5 million DDoS attacks in the first quarter of the year — a 50% increase compared to the previous year. Read the full coverage...
Advanced DNS Protection: mitigating sophisticated DNS DDoS attacks
2024-03-07
We're proud to introduce the Advanced DNS Protection system, a robust defense mechanism designed to protect against the most sophisticated DNS-based DDoS attacks...
Cyber attacks targeting Jewish and Holocaust educational websites surge by 872% in 2023
2024-01-26
In 2023, Cloudflare mitigated 35.7 million malicious requests that targeted Jewish and Holocaust educational websites. Today more than ever, it’s important to ensure these websites are protected and available...
DDoS threat report for 2023 Q4
2024-01-09
Welcome to the sixteenth edition of Cloudflare’s DDoS Threat Report. This edition covers DDoS trends and key findings for the fourth and final quarter of the year 2023, complete with a review of major trends throughout the year...
DDoS threat report for 2023 Q3
2023-10-26
In the past quarter, DDoS attacks surged by 65%. Gaming and Gambling companies were the most attacked and Cloudflare mitigated thousands of hyper-volumetric DDoS attacks. The largest attacks we saw peaked at 201 million rps and 2.6 Tbps....
DDoS threat report for 2023 Q2
2023-07-18
Q2 2023 saw an unprecedented escalation in DDoS attack sophistication. Pro-Russian hacktivists REvil, Killnet and Anonymous Sudan joined forces to attack Western sites. Mitel vulnerability exploits surged by a whopping 532%, and attacks on crypto rocketed up by 600%....
SLP: a new DDoS amplification vector in the wild
2023-04-25
Researchers have recently published the discovery of a new DDoS reflection/amplification attack vector leveraging the SLP protocol. Cloudflare expects the prevalence of SLP-based DDoS attacks to rise in the coming weeks...
Introducing Cloudflare’s new Network Analytics dashboard
2023-04-12
Learn how the new and improved Network Analytics dashboard provides security professionals insights into their DDoS attack and traffic landscape...
DDoS threat report for 2023 Q1
2023-04-11
Threat actors kicked off 2023 with a bang. The start of the year was characterized by a series of hacktivist campaigns against Western targets, and record-breaking hyper volumetric attacks...
Cloudflare mitigates record-breaking 71 million request-per-second DDoS attack
2023-02-13
This was a weekend of record-breaking DDoS attacks. Over the weekend, Cloudflare detected and mitigated dozens of hyper-volumetric DDoS attacks. The majority of attacks peaked in the ballpark of 50-70 million requests per second (rps) with the largest exceeding 71 million rps...
Uptick in healthcare organizations experiencing targeted DDoS attacks
2023-02-02
Over the past few days, Cloudflare, as well as other sources, have observed healthcare organizations targeted by a pro-Russian hacktivist group claiming to be Killnet. ...
Cyberattacks on Holocaust educational websites increased in 2022
2023-01-27
Today, 78 years after the liberation of the Auschwitz death camp, we mark the International Holocaust Remembrance Day. With Cloudflare’s Project Galileo, we protect Holocaust educational websites and at risk public interest groups. Read more to see how attacks on these groups increased in 2022....