2026-05-07
When a critical Linux kernel privilege escalation was publicly disclosed, Cloudflare's security and engineering teams detected, investigated, and mitigated the threat across our global fleet, confirming zero customer impact and no malicious exploitation....
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...
2018-07-06
Internally our DDoS mitigation team is sometimes called "the packet droppers". When other teams build exciting products to do smart things with the traffic that passed through our network, we take joy in discovering novel ways of discarding it....
2018-06-01
Cloudflare is protected from attacks by the Gatebot DDoS mitigation pipeline. Gatebot performs hundreds of mitigations a day, shielding our infrastructure and our customers from L3 and L7 attacks. ...
2018-05-21
With more platforms adopting DDoS safeguards like integrating mitigation services and enhancing bandwidth at vulnerable points, Layer 3 and 4 attacks are becoming far less effective than before....
2018-02-27
Over last couple of days we've seen a big increase in an obscure amplification attack vector - using the memcached protocol, coming from UDP port 11211. In the past, we have talked a lot about amplification attacks happening on the internet. ...
2017-12-07
Cloudflare has been recognized as a leader in the “Forrester WaveTM: DDoS Mitigation Solutions, Q4 2017.”...
2017-11-23
News outlets and blogs will frequently compare DDoS attacks by the volume of traffic that a victim receives. Surely this makes some sense, right? The greater the volume of traffic a victim receives, the harder to mitigate an attack - right? ...
2017-09-25
When building a DDoS mitigation service it’s incredibly tempting to think that the solution is scrubbing centers or scrubbing servers. I, too, thought that was a good idea in the beginning, ...
2017-09-25
In the past, we’ve spoken about how Cloudflare is architected to sustain the largest DDoS attacks. During traffic surges we spread the traffic across a very large number of edge servers. ...
2017-09-25
This is the week of Cloudflare's seventh birthday. It's become a tradition for us to announce a series of products each day of this week and bring major new benefits to our customers. We're beginning with one I'm especially proud of: Unmetered Mitigation....
2017-04-13
Today, Cloudflare is extending its Rate Limiting service by allowing any of our customers to sign up. Our Enterprise customers have enjoyed the benefits of Cloudflare’s Rate Limiting offering for the past several months. ...
2016-12-02
In March 2015, we wrote about a Winter of Whopping Weekend DDoS Attacks where we were seeing 400Gbps attacks. We speculated that attackers were busy with something else during the week....
2016-11-08
The strength of the Internet is its ability to interconnect all sorts of networks — big data centers, e-commerce websites at small hosting companies, Internet Service Providers (ISP), and Content Delivery Networks (CDN) — just to name a few. ...
2016-10-26
The last few weeks have seen several high-profile outages in legacy DNS and DDoS-mitigation services due to large scale attacks. Cloudflare's customers have, understandably, asked how we are positioned to handle similar attacks....
2016-09-30
Cloudflare helps customers control their own traffic at the edge. One of two products that we introduced to empower customers to do so is Cloudflare Rate Limiting....
2016-03-03
Over the last month, we’ve been watching some of the largest distributed denial of service (DDoS) attacks ever seen unfold. As CloudFlare has grown we've brought on line systems capable of absorbing and accurately measuring attacks....
2015-03-10
It’s 9am and CloudFlare has already mitigated three billion malicious requests for our customers today. Six out of every one hundred requests we see are malicious, and increasingly, more of those bad requests are targeting DNS nameservers. ...
2014-01-09
Over the last couple of weeks you may have been hearing about a new tool in the DDoS arsenal: NTP-based attacks. These have become popular recently and caused trouble for some gaming web sites and service providers....
2013-03-27
The New York Times this morning published a story about the Spamhaus DDoS attack and how CloudFlare helped mitigate it and keep the site online. The Times calls the attack the largest known DDoS attack ever on the Internet....
