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 184.108.40.206, and what the future holds for DNS cache poisoning attacks....
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Unwrap the SERVFAIL
October 30, 2020 12:00PM
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
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
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....
Orange Clouding with Secondary DNS
August 20, 2020 12:00PM
Secondary DNS Override is a great option for any users that want to take advantage of the Cloudflare network, without transferring all of their zones to Cloudflare DNS as a primary provider....