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Fifty Years Ago

10/29/2019

History

On 29 October 2019, Professor Leonard (“Len”) Kleinrock is chairing a celebration at the University of California, Los Angeles (UCLA). The date is the fiftieth anniversary of the first full system test and remote host-to-host login over the Arpanet....

Cloudflare response to CPDoS exploits

10/24/2019

AttacksVulnerabilities

Three vulnerabilities were disclosed as Cache Poisoning Denial of Service attacks in a paper written by Hoai Viet Nguyen, Luigi Lo Iacono, and Hannes Federrath of TH Köln - University of Applied Sciences. These attacks are similar to the cache poisoning attacks presented last year at DEFCON....

It's crowded in here!

10/12/2019

eBPFLinuxUDP

We recently gave a presentation on Programming socket lookup with BPF at the Linux Plumbers Conference 2019 in Lisbon, Portugal. This blog post is a recap of the problem statement and proposed solution we presented....

Welcome to Birthday Week 2019

09/22/2019

Birthday WeekProduct News

September has always been a special month for Cloudflare. Nine years ago — on September 27th — we launched Cloudflare. And, each year since, we’ve celebrated our birthday with a week full of new products and innovations that support our mission of helping to build a better Internet....

When TCP sockets refuse to die

09/20/2019

SYNTCPSpectrumTech Talks

We noticed something weird - the TCP sockets which we thought should have been closed - were lingering around. We realized we don't really understand when TCP sockets are supposed to time out! We naively thought enabling TCP keepalives would be enough... but it isn't!...