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SAD DNS Explained

2020-11-13

DNSSecurityVulnerabilities

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....

Unwrap the SERVFAIL

2020-10-30

DNSResolver

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....