Marek Vavruša - The Cloudflare Blog

Now we’re happy to announce we will return more error code types and include additional helpful information to further improve your debugging experience....

November 13, 2020 7:06PM

SAD DNS Explained

DNS Security DNS Poisoning Vulnerabilities

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....

May 10, 2017 10:50PM

How Cloudflare analyzes 1M DNS queries per second

DNS Analytics Cap'n Proto Speed & Reliability

On Friday, we announced DNS analytics for all Cloudflare customers. Because of our scale –– by the time you’ve finished reading this, Cloudflare DNS will have handled millions of DNS queries –– we had to be creative in our implementation....

Marek Vavruša

February 14, 2017 6:04PM

Want to see your DNS analytics? We have a Grafana plugin for that

Analytics DNS Grafana DDoS Reliability Security Plugins

Curious where your DNS traffic is coming from, how much DNS traffic is on your domain, and what records people are querying for that don’t exist? We now have a Grafana plugin for you....

Marek Vavruša

February 29, 2016 1:42PM

A tale of a DNS exploit: CVE-2015-7547

Vulnerabilities OpenDNS DNS Reliability Programming

A buffer overflow error in GNU libc DNS stub resolver code was announced last week as CVE-2015-7547. While it doesn't have any nickname yet (last year's Ghost was more catchy), it is potentially disastrous....