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Gcore Stops Record 6 Tbps DDoS Attack Impacting Global Networks

By Jordan Grim • October 20, 2025 • 10:11 AM (ET)

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A massive ddos attack this week tested the limits of global internet infrastructure after striking a hosting provider in the gaming sector. The attack, mitigated by Gcore, reached a record peak of 6 terabits per second (Tbps) and a packet rate of 5.3 billion packets per second (Bpps), making it one of the largest ddos attacks 2025 has seen so far.

Table of Contents

A Rapid and Intense Disruption

The short-burst attack lasted less than a minute but generated overwhelming traffic across several regions. According to Gcore, most malicious traffic originated from Brazil (51 percent) and the United States (23.7 percent).
Security analysts linked the event to the AISURU botnet, a network already responsible for multiple large-scale ddos attacks today targeting tech and enterprise systems.

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A Growing Global Threat

Data from Gcore’s Radar report Q1-Q2 2025 shows a 41 percent rise in DDoS incidents compared with the previous quarter. Tech and hosting providers accounted for nearly one-third of all reported attacks, highlighting a wider pattern of coordinated digital disruption.

Experts say these incidents reflect an evolution in attacker tactics. Instead of prolonged attacks, many now use high-intensity bursts to test the resilience of network defenses or distract teams from other vulnerabilities.
Andrey Slastenov, Gcore’s Head of Security, noted that even a short outage can cause serious damage. “Uptime is currency. A few seconds of downtime can impact trust and revenue,” he said.

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Gcore’s Response and Prevention Strategy

Gcore’s global DDoS protection network absorbed the flood without service interruption. The company credits its defense capacity of over 200 Tbps and its 210-plus Points of Presence across six continents for the successful mitigation.

Its real-time traffic inspection system uses adaptive filtering and behavioral analytics to detect abnormal activity before it affects customers. These measures are part of Gcore’s broader focus on ddos attacks prevention as digital threats grow more complex.

What This Means for Businesses

The recent ddos attack highlights how essential layered security has become for organizations that depend on consistent connectivity. Hosting companies, gaming platforms, and online retailers are being urged to update mitigation systems and train teams to respond to ddos attacks right now, rather than after they occur.

While Gcore restored stability quickly, the event serves as a reminder that even brief disruptions can ripple through global operations.

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