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Background for this topic.
Denial of service (DoS) is an attack that makes a system, network, or application unavailable by exhausting resources or triggering failure. Floods can consume bandwidth, connection state, CPU, memory, or request-processing capacity; a software defect may instead be exploited to crash a service. A distributed denial-of-service (DDoS) attack generates traffic from many systems, increasing volume and complicating source-based blocking. The material security impact is loss of availability for users and dependent services, including websites, APIs, DNS, and operational systems.
Mitigation should match the bottleneck. Rate limits, request validation, connection protections, caching, and service isolation can reduce application and state-exhaustion attacks; volumetric traffic generally needs filtering or absorption upstream of the network. Monitoring should distinguish abnormal request patterns from ordinary load and alert on saturation, while tested failover, traffic diversion, and restoration procedures limit outage duration. Vulnerability management and timely patching reduce DoS caused by remotely triggerable crashes, but do not replace capacity planning and resilience testing.
This scale of this month's encrypted DDoS attack over HTTPS suggests a well-resourced operation, analysts say.
The Romanian national cyber security and incident response team, DNSC, has issued a statement about a series of distributed denial-of-service (DDoS) attacks targeting several public websites managed by the state entities. [...]
Ukraine's computer emergency response team (CERT-UA) has published an announcement warning of ongoing DDoS (distributed denial of service) attacks targeting pro-Ukraine sites and the government web portal. [...]
At 15.3 million requests per second, the assault was the largest HTTPS blitz on record lasting 15 seconds Cloudflare this month halted a massive distributed denial-of-service (DDoS) attack on a cryptocurrency platform that not only was unusual in its sheer size but also because it was launched over HTTPS and primarily originated from cloud datacenters rather than residential internet service providers (ISPs).…
Cloudflare on Wednesday disclosed that it acted to mitigate a 15.3 million request-per-second (RPS) distributed denial-of-service (DDoS) attack. The web infrastructure and website security company called it one of the "largest HTTPS DDoS attacks on record." "HTTPS DDoS attacks are more expensive in terms of required computational resources because of the higher cost of establishing a secure TLS
More attacks and more targeted attacks than ever before. What could have happened to cause that uptick? Kaspersky has released a report showing Distributed Denial of Service (DDoS) attacks hit an all-time-high in the first quarter of 2022.…
Unprecedented numbers of DDoS attacks since February are the result of hacktivists' cyberwar against Russian state interests, researchers say.