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DNS

SAD DNS Explained

November 13, 2020 7:06PM

Researchers from UC Riverside and Tsinghua University found a new way to revive a decade-old DNS cache poisoning attack. Read our deep dive into how the SAD DNS attack on DNS resolvers works, how we protect against this attack in 1.1.1.1, and what the future holds for DNS cache poisoning attacks....

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Unwrap the SERVFAIL

October 30, 2020 12:00PM

DNS Resolver

We recently released a new version of Cloudflare Resolver, which adds a piece of information called “Extended DNS Errors” (EDE) along with the response code under certain circumstances. This will be helpful in tracing DNS resolution errors and figure out what went wrong behind the scenes....

DNS Flag Day 2020

October 02, 2020 8:35AM

DNS Reliability

October 1 is DNS Flag Day, an initiative by the DNS community to make DNS more secure, reliable and robust. This year the focus is on problems around IP fragmentation of DNS packets....

Secondary DNS - Deep Dive

September 15, 2020 12:00PM

DNS Speed Reliability Growth Kubernetes

The goal of Cloudflare operated Secondary DNS is to allow our customers with custom DNS solutions, be it on-premise or some other DNS provider, to be able to take advantage of Cloudflare's DNS performance and more recently, through Secondary Override, our proxying and security capabilities too....

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